Cupcake24; The first Cupcake in a decade.

[limpid jasper]

For a while now I've noticed you see many a RepRap, and many a Replicator, but where are the Cupcakes?
MakerBot only made a limited number of these - around three thousand, and there is a very small number of "Pirate CupCakes" - Cupcake-based machines heavily costcut and intended to be used as a RepStrap to print a Mendel.

Of these few machines, fewer still survive till today. I take issue with this, and wanna use my skills and access to equipment to build a new one.
While the resources to build one of these machines are spread amongst a million tiny archives, it /is/ out there. In this forum post, I plan to record relevent information and document what I do- Plus, considering there are varying versions of the machine, seek feedback on what specifically to focus on and build.

More to come, it's almost 2am as I type this.

[limpid jasper]

Links and Resources Shit that may be useful and important!

• Makerbot Wiki for the Cupcake Obvious.
• MakerBot Google Code Repo Downloads for a lot of files
• WORKING SVN archive
• Kieths Blog Lots of details and knowledge here, as recently as 2020. Need to make a list of all this, for a seperate post.

Thingiverse used to have sub-models as part of a single larger model, support for this has since been removed. Thus it is necessery to refer to an an archive of the site for these sub-parts of the CupCake: https://web.archive.org/web/20120312100714/http://www.thingiverse.com/thing:457

Original Makerbot Builds & Resources There's a lot of high-resolution builds on flickr and other sites, these could be useful for referencing

• Abellas Makerbot, April '10
• Assorted extras, Second Makerbot
• Makerbot Flickr Group
• Makerbot No. 9, May '10 Very detailed build breakdown
• Joels Makerbot, May '10 A few high-res hero shots
• Hero Shot, Dec '09
• Russian Review LOTS of detailed pictures of the build; This ones a bit later, for a very late Thingomatic model, but its ~very~ closely related.
• Makerbot Flickr Documentation images, exploded view!!!

Not necesserily useful, but neat!

• MakerBot behind the scenes, Sep '09

[limpid jasper]

https://docs.google.com/spreadsheets/d/11XP8X_XVbw7jFxVo0nWEHMgmYAYQNAdbke7tJSI9kLk/edit?usp=sharing Bill of Materials organised into a Spreadsheet

Managed to find some info on all the rods the machine uses, beyond just the quanity; So thats one thing down.

[eager vessel]

Gonna make it out of steel instead of wood?

[limpid jasper]

Nah, I wanna stick as close to original as possible.

[eager vessel]

Will you stick to standard metric screws for Z or you'll upgrade to trapezoidal?

[limpid jasper]

I think Makerbot themselves were experimenting with leadscrews themselves, so I could save myself a lot of pain and use those. Ill have to look at the archives

[limpid jasper]

Intermission post: Will continue more this weekend after college:

https://www.youtube.com/watch?v=VOYYWDUTZ1w
https://www.youtube.com/watch?v=t4pXxg0WZRw
https://www.youtube.com/watch?v=K2qrEAFYQBQ
https://www.youtube.com/watch?v=Z-VSbdm9_N0

[limpid jasper]

so! good news and bad news

https://downloads.makerbot.com/support/pdf/Cupcake/Docs/Cupcake Build Sequence - Batches 1-9.pdf
the good news is i found hella details on the makerbots

the bad news is i got reminded this was a project made in an imperial country.

[limpid jasper]

Interestingly despite its age the makerbot uses GT2 belts and pulleys, this makes the motion components easy rk source

[limpid jasper]

found a sick mod from the era

https://web.archive.org/web/20120202015812/http://www.tinkerin.gs/p/psmd-pololu-stepper-motor-driver-triple.html

A drop-in replacement for the MakerBot stepper drivers that contains all three axes on one board. This is a carrier board for three Pololu A4983 stepper drivers.

This board and the drivers make your stepper motors run at eight times higher resolution (1/16th steps instead of 1/2 steps), making it run smoother and way quieter.
https://www.thingiverse.com/thing:4526

https://www.flickr.com/photos/jabella/5590151175/in/album-72157623829152993

[eager vessel]

1/2 steps

[limpid jasper]

friend placed a digikey order and pikced me up some drivers

[limpid jasper]

oh my god the driver has blinkenlights

[eager vessel]

We need LED adapter board for steppers

[warm ivy]

@eager vessel you did swe the new custom driver modules from Fly and BTT? fully blinkenlights

[limpid jasper]

Just finished updating the schematic for the drivers.

[limpid jasper]

Finished porting forward the driver module

[limpid jasper]

Slight silkscreen tweaks, plus marking that its my own variant x3

[limpid jasper]

XY axis ready for lasercutting.

[limpid jasper]

God dammit.

I need to split the frame up into four seperate panels
It uses 4mm, not 3mm, so I need to order it myself rather than use what the space has in stock
these are £12.60/e from kitronix, £50 for four plus I need the acrylic too & a tenner shipping.

tfw the most expensive part of this isn't going to be making my own hotend, or building original electronics... it's the fuckin wood frame TwT

[limpid jasper]

Mayyybe I need to shoot E3D and some other 3DP shops some emails asking for help funding this in exchange for engraving their logos onto it

[warm ivy]

When you consider doing it all over, consider 6mm Alu dibond rather than wood for that Ultimakerish glow-up

or 4mm if you don't wanna redraw everything

[limpid jasper]

oooh that sounds silly, ill have to keep that in mind for when i make a second one to mod the hell outta x3

rn the goal is

• Build one to BoM spec
• Use what I learn from that, to build another one with mods and tinkering done to it

[limpid jasper]

https://www.flickr.com/photos/53678031@N00/albums/72157622751603163/with/4346151143

http://www.f15ijp.com/category/making/making-made-buildlog/
Stumbled across two more builds with good details while looking for info on the Mk4 Plastruder

skimming through ANCIENT videos for any notable details
https://www.youtube.com/watch?v=eZz2EXNvX7M

• ATX PSU was specced at 400w

https://www.youtube.com/watch?v=dUL6h88U0GM
fuck there's no specs label for the plastruder motor!

https://www.youtube.com/watch?v=NueRhgISweE o shit

[limpid jasper]

also of ancient note: i went and managed to find the original, not heavily compressed images of Kaz's Cupcake #2172; #3d-printing message
Not really much of note here, just interesting.
I was hoping there'd be a picture with a good angle of the DC extruder motor but there isnt sadly

I may actually have to pester a Cupcake owner to get the dimensions & specs on the thing, or just wing it and figure out from the lasercutting files x3

[warm ivy]

are you sure you want to build it with a brushless motor?

[limpid jasper]

Yeah! Mk4, absolute piece of shit.

I would do Mk3 buttt the files for that are missing

I'm planning to keep this as close to Batch 1 BoM I can, including the lasercut pulleys

[warm ivy]

Alright then (-;

[limpid jasper]

I crave pain I must have 8hrs MTBF

[warm ivy]

https://www.thingiverse.com/thing:419

[limpid jasper]

If I build a second Cupcake I'll probally stick a Stepstruder in it and run the motor off a fourth motor driver board

[limpid jasper]

If you compare it to the Mk4 there's stuff missing like the files for the acrylic mounts

[warm ivy]

Aren’t those compatible?

[limpid jasper]

Hmn. Maybe? I'd need to CAD it

TODO: Add this to BoM spreadsheet
17T GT2 Pulley, £1.10/e https://a.aliexpress.com/_Euatf9b

[warm ivy]

17T

[limpid jasper]

Yup. Makerbot were deranged, the Cupcake & Replicator use 17T instead of 16T or 20T

Was a real fucking headache figuring out why my rotation distance was Wrong when I klipperised ReBizer lmao

I could reuse ReBizers old 17Ts, but I want a set that's not the cheapest possible ones from a decade ago - Plus, nice complete BoM :>

[limpid jasper]

3x3x3 magnet source found, https://a.aliexpress.com/_EJWPWSh

[limpid jasper]

open up the drawings for the Mk3 hotend
no fucking dimensions, or indications of threading or w/e
god dammit ig i gottaw redraw the whole thing. may as well open it up in F360 and CAD it properly ig...

[limpid jasper]

https://www.flickr.com/photos/bre/albums/72157622069934618/
0.5 Mk3 nozzles

https://www.flickr.com/photos/bre/4407407369/in/album-72157622120790077
http://store.makerbot.com/toolheads/plastruder/makerbot-spare-parts-kit.html
https://web.archive.org/web/20100308044834/http://store.makerbot.com/toolheads/plastruder/makerbot-spare-parts-kit.html

"MakerBot Industries Spare Parts Kit", March 2010. For a Mk4

[limpid jasper]

went and found the CAD program they used, fuckin QCAD.

[limpid jasper]

ill make proper drawings of everything once i finish doing all the parts in 3D :>

[limpid jasper]

no im not procrastinating on actually making the new drawings did a nice render of the complete hotside

[limpid jasper]

r u fucking kidding me
hobbyist fusion360 doesn't export PDF

[eager vessel]

What does it export then?

[limpid jasper]

You can't export drawings.

[eager vessel]

Man, that's terrible

[limpid jasper]

What the actual fuck Autodesk

BAHAHA THEY DIDNT DISABLE PRINT TO PDF

GET FUCKED

Not my finest work, but I'm not really used to dimensioning small round shit like this

[ionic oriole]

[limpid jasper]

Mk3 Plastruder; Nozzle

Mk3 Plastruder; Heater Barrel

Mk3 Plastruder; Thermal Insulator

[autumn crest]

how rich are you

is that catia

[warm ivy]

Looks like FreeCAD

[autumn crest]

oh

looks like catias background

[warm ivy]

I never saw Catia but the 3d nav cube looks like FreeCAD

[autumn crest]

yeah that would make sense

dollar value catia lol

[warm ivy]

Alright, now I understand why FreeCAD looks like that (-:

Back to cupcake

[limpid jasper]

Yeah, I assumed FreeCAD would be able to parse the funky dxfs of the original files. it could not. I had to go download fucking QCAD to be able to see dimensions n shit lmao

Tided up the modernised driver PCB a bit, adding in part values and such, akin to the original

[eager vessel]

This via here makes me unreasonably mad

[limpid jasper]

Since the rear of the board is entirely empty, I used it as space to add info about the board.
need to make that GH repo lol

[limpid jasper]

i would lower the text so the via passed through the center of the 0
BUT that would mean it isnt alligned anymore!!!

ill move the via xD

[eager vessel]

Thank you

[limpid jasper]

FUCK

just realised that when my friend was making their bulk digikey order & got me the drivers, i forgot to send them the trimpot the board uses.
Aliex don't have it, and the UK ebay sellers want £5.60/e instead of the £1.47/e @ digikey ._.

hmn i think i found a compatible part

Original: Vishay T73YE103KT20
https://www.digikey.com/en/products/detail/vishay-sfernice/T73YE103KT20/1587805
Compatible?: BOURNS 3362P-1-103LF
https://www.lcsc.com/product-detail/Potentiometers-Variable-Resistors_BOURNS-3362P-1-103LF_C58159.html

Same footprint, Same resistance & tolerance, Same no of turns.... Ehhh fuck it ill go w/ it

[limpid jasper]

Someone on eBay is selling a cupcake for $1500. Nothing of much note, it does show the full PSU specs tho
https://www.ebay.com/itm/326327189177?itmmeta=01JC1224BNYS10JZ41SZP5EHYR

30A of +5v, 11A of +12v. Most of the gen3 boards regulate 5v down from 12v.
3V3, -5V, -12V, +5VSB Are unused

https://web.archive.org/web/20100112044122/http://store.makerbot.com/cupcake-cnc/cupcake-cnc-drive-system-kit.html part details!!!

https://web.archive.org/web/20100110221128/http://store.makerbot.com/cupcake-cnc/laserless-makerbot-industries-cupcake-cnc.html
wtf makerbot lmao

"you dont need endstops" make an already hard to use machine hard eh?

[limpid jasper]

Just finished putting together the LCSC BoM for these

$10 for the parts for three 2.3 drivers from LCSC, plus $17 for 3x A3982s from Digikey
$29 total in parts when you add on $2 for PCBs from JLCPCB; thats $9.66 per driver.

Compare that with the price of an assembled board on the MakerBot store in July 2010, they were charging $35 for one driver - Adjusting for inflation, that's $50!

[warm ivy]

single motor quad z and a hand wheel

[warm ivy]

looks like an ATX PSU?

[warm ivy]

you can be pretty sure their part and production cost was higher back in 2010, 35$ probably had very little margin

[limpid jasper]

Oh for sure!

Just interesting to see how much cheaper this has gotten in the 14 years since!

[limpid jasper]

yeah its fuckin weird what setup they had then isnt it? xD

[limpid jasper]

Yup, All I knew was its "400w" per the spec shee... Didnt have how much 12v rail needed listed tho!

[warm ivy]

We can now claim that Voron 2.4 is a cupcake derivative

[limpid jasper]

pfff

[eager vessel]

Get a 2.4 serial

[limpid jasper]

this reminds me that at some point i wanna make a version of the v0 that has a cupcake-style wooden frame xD

[eager vessel]

I wonder if DICE could be serialized as V0

[warm ivy]

Take ultimaker2go plans

[limpid jasper]

what the fuck

[eager vessel]

I love it

[warm ivy]

@limpid jasper you haven’t seen the water cooled version yet

(Those plans never got published)

[limpid jasper]

omg

[warm ivy]

https://rene-jurack.de/dice-watercooled-this-time-not-a-teaser/

I lied

This has fusion plans including water cooled drivers

But let’s not distract you from cupcake

[tawny crypt]

krupcake

[limpid jasper]

Spent the past hour writing up and documenting the electronics changes to upload to GH :>

https://github.com/comradef191/Cupcake24

Currently only uploaded the Electronics, will add more as time goes on. I still need to write up readmes for each of the boards to document any changes plus the new BoM

[limpid jasper]

£3.88 for 10 blanks ($5), £0.39 ($0.51) each :>
I plan to giveaway the 7 extra @ SMRRF

[tawny crypt]

Niceeeee!!!!

[limpid jasper]

Placed a fuckoff big LCSC & JLCPCB order

Ordered 10 driver PCBs and parts to assemble 3 (+ like 100 MoQ smd parts lol)

[tawny crypt]

Yooooo!!!!

[limpid jasper]

because Dead reminded me Resolves are a thing, i think im going to have a re-do of this- going off of how (old) V6 nozzles chamfer down to the small bore

[limpid jasper]

Im also going to adjust this to be 13mm long instead of 12.803, will be easier to make and the added length shouldnt really effect much - just need to set my height higher!

[warm ivy]

yes, de-imperialize whatever you can

[limpid jasper]

Looking through orphaned pages on the old wiki
http://makerbot.wikidot.com/preparing-for-the-makerbot Suggests tools to use, and test prints - plus some earrrlly mods

[warm ivy]

the internet never forgets

[limpid jasper]

one of the pagers suggested using 3-in-1 oil for rod lubrication also so
i guess....

[limpid jasper]

While i wait on my boards to ship, ive been filling in more of the BoM, looking at the pulleys

Referencing one blog, there seems to be two seperate styles of pulleys/idlers for the Z-Axis

We have seemingly five identical 36T pulleys - which have a brass insert?
Plus two smooth idlers- Made of lasercut wood on the Batch 1.

[warm ivy]

the center and left/right inserts are different?

[limpid jasper]

https://www.aliexpress.com/item/32994788405.html
I was able to find Powge sell 36T pulleys, in varying sizes. Though these dont have an insert

The issue Im seeing, looking at these, is welll
The shaft on the motor is going to be a fair bit smaller than the M8 threadded rods.

I can only find info about makerbot printing/lasering the idlers, so they must've been purchasing the pulleys. main issue is they dont specify any details beyond "Large 36T Pulley"

[warm ivy]

just get 8mm shaft steppers SMH

[eager vessel]

https://www.walmart.com/ip/3DMakerWorld-GT2-Timing-Pulley-36-Tooth/800981021

[limpid jasper]

the fuck lmao

[eager vessel]

RS Pro has these but with alu hub
https://sg.rs-online.com/web/p/belt-pulleys/7784733

[limpid jasper]

fucking hell

i think what I might do is just get 8mm Powge pulleys and then plug the gap between pulley & motor shaft with a printed spacer

[eager vessel]

Will introduce runout. Can't you just get different pulleys for steppers?

[limpid jasper]

hmn. Iiiii assummeee the different size of powge pulleys just changes the ID, and nought else?

Probally best to just go w/ that

By the looks of things the Powge 36T pulleys do seem have a smaller diameter, so i'll probally need to swap the Z belt

[eager vessel]

Why would you have to? Pitch diameter depends only on the tooth count and belt pitch

[limpid jasper]

oh? sick, i was just eyeballing it

[eager vessel]

Pitch diameter is literally "if we replace the timing belt with a flat belt relying on friction, what diameter would everything have to be to keep all of the movement identical"

[tawny crypt]

Those are some interesting pulleys (and cantilevered ugh)

[limpid jasper]

? Z axis very much is not cantilevered - though that was an upgrade mfs made x3

its single-motor quad-z lol

[tawny crypt]

Oh god lmao

[ionic oriole]

What the

[warm ivy]

with a hand crank

hey, this is ... 2011 tech?

[limpid jasper]

2009!

[autumn crest]

…hand crank??

[eager vessel]

Why would you use a fiddly screen to move Z axis

[tawny crypt]

Or just, use a keyboard, and type it in....

[autumn crest]

boring, telekenisis is better

[warm ivy]

@autumn crest ^

How else would you precisely zero out the bed especially on the later revision kits that left out end stops (and no, sensor less homing was not a thing back in the day, and the Allen key z probe had yet to be invented I believe)

[limpid jasper]

I still find the absence of ends tops on later kits ridiculous
they even actually increased the price when they took them out lol

The original electronics kit was $175 and included endstops and some other bits

When they took those out they bumped it to $199.99

[limpid jasper]

driver PCB blanks arrivied

[tawny crypt]

YAYYYYY!!!!

[warm ivy]

aaaactuallly

those large driver PCBs probably are better heatsinks than the blue find stuck onto the plastic housing

[tawny crypt]

They are designed to dissipate heat through the copper fill of the PCB, not the epoxy layer lmao.

[warm ivy]

exactly

[tawny crypt]

It's also why I really hate the design of stepsticks

Nowhere near enough copper fill to cool down the drivers

[warm ivy]

there were bigfoots but nobody ever used them. And its one of the things I like about Duet hardware: Proper thermal vias and high copper content in the PCBs

[limpid jasper]

stepstick design being shit is why im so excited for Corvus being semi-sorta-almost-v1.0

they're large enough i could port the cupcake driver to them lmao

meridi thinking their TMC2209 driver is the lowest-end module when i arrive with a tape of A3982s

[tawny crypt]

Ooooh!

[eager vessel]

You can build discrete drivers

[warm ivy]

now that's thinking outside the box.

[limpid jasper]

once the board they're designed for isn't in Beta i'm probally going to be looking at getting my own boards using them
(The footprint & pinout of the drivers have changed a few times over the development of the board, so I want to wait for 1.0 where it absolutely will not be changed)

[tawny crypt]

Nyoomies TMC 4671!!??

[limpid jasper]

https://www.youtube.com/watch?v=Y290puFwcR4&list=PLE9905B35BE5C7DB7 more useful potentially info

Plastruder Mk4 motor

1GB known-good for original FW on mainboard

[limpid jasper]

good lord its a complete guide

[limpid jasper]

JLCPCB componets arrivied

i may now assembled the drivers :D

[eager vessel]

Time yourself

[limpid jasper]

ah balls

i forgot to order the trimpots & red LEDs

[limpid jasper]

Was talking to a rep for one of the filament companies at SMRRF who I met last year

He said he may be able to get production to make some of the funky extra-large unspooled cupcake filament for me for this

[limpid jasper]

I was told their spooling machines just spool onto anything cylindrical, I think I could design a printed spool that's then removed so it spools neatly to the right size
They even do 2.85 stuff lol!

can't wait to horrify them as I ask for filament to be made in pounds not kilos bahahah

[limpid jasper]

There was some interest from some folks at SMRRF who aren't here, so I'm going to posting a lot of my progress to a dedicated server from now-on for the most part, DM me for links on that

nobody joined lmao

[maiden ether]

and no one heard anything ever again

[limpid jasper]

working on PCBs again!

Apart from the motherboard & extruder drivers needing to be finished being modernised, the Endstops have been left entirely unaccounted for!

The easist option would be to use a Mechanical endstop like on modern machines and the Rep1, but these only got released in June 2009
https://www.thingiverse.com/thing:762

Opto Endstop v2.1, circa October 2008 per Hoekens flickr page is what I assume shipped stock w/ batch 1
https://www.thingiverse.com/thing:940
https://reprap.org/wiki/OptoEndstop_2.1

there is an issue though with this design, v2.1 is designed for the H21LOB or ZD1901 optoswitches, neither of which are made or sold anymore

I could remedy this by adapting the Gen7 v1.3.1 https://reprap.org/wiki/Gen7_Endstop_1.3.1
Its designed for the TCST2103, still made and sold - $1.31/e @ LCSC

Does mean I wont be able to straight use an original PCB sadly

[limpid jasper]

Basically ported across the Gen7 design to the Gen3 PCB, rather than attempting to locate a H21LOB
Maintains a very visually similar board while having the Gen3 connector needed

original schematics

[limpid jasper]

figured out the specific motor used

https://www.kysanelectronics.com/Products/cat_pro_rev.php?recordID=2055

Data Group: 915
SKU: 1156006
Weight (Kg): 1.5000
Decsription: A37RE-12V2RPM
HS Code: 8501.31.6000
Applications: Electric-drive curtain, Stage illumination, Airbrake switch.

Ideal for extruder motor for Makerbot thing o matic & Cup Cakes. Directioin of Rotation: Clockwise CW
https://www.kysanelectronics.com/Products/cat_pro_specs.php?recordID=2055

[limpid jasper]

assholes.

that complicates things A Lot

[autumn crest]

https://kysanelectronics-com.3dcartstores.com/A37RE-12V2RPM_p_1199.html

oh

whoops

was about to say "this is a different site" but it is not

could you not just find an identical 12v motor

looks like any other regular dc motor

[eager vessel]

Well, send an email

[limpid jasper]

i willl, just eating rn

Oh yeah lmao i found out what Makerbot used as the "gear" for the extruder

its a fucking 17tooth 3mm-wide GT2 pulley.

[eager vessel]

1,3% efficient motor

[limpid jasper]

i cant imagine 16 years on warehouse shelves has helped lol

[limpid jasper]

• very specific specs
• a new one will prolly be better lol, i want equally shit x3

[limpid jasper]

Request for Single Motor Order for Makerbot Cupcake Project

Dear Kysan Electronics,

I am working on building a brand-new Makerbot Cupcake 3D printer following the original BoM as closely as possible, this BoM specifies the use of a Kysan 1156006 (A37RE-12V2RPM) DC motor, which is priced at $15.50 on your site and makes mention of being "ideal" for this very task.

I understand your minimum order value is $100, but as this is a personal project, I’m hoping to place an order for just this one motor.
Would it be possible to accommodate this request?


Thank you for your time and assistance.

Best regards,
Sophie

thoughts on this before I send it?

[warm ivy]

looks good

[limpid jasper]

sent! will keep everyone updated :>

[limpid jasper]

ah feck

ill try from my not nearly as fancy email

[warm ivy]

well the error is that the server can't deliver to those addresses, not that yours is rejected

it may just be graylisting

[limpid jasper]

LETS FUCKIN GOOOOOOOOOOOOO

https://tenor.com/view/cr1tikal-penguinz0-meme-woo-yeah-baby-gif-19316511

[burnt cobalt]

insane

[limpid jasper]

also i just noticed they havent mentioned billing info like

at all

so uhhh maybe kysan are chill as fuck and are sending me it free?

[autumn crest]

they'll probably send an invoice or quote

[limpid jasper]

maybe
maybe not
we'll see

i budgeted $30 for this though so w/e it is im fine

[burnt cobalt]

lights

[warm ivy]

stepper phase disco?

[limpid jasper]

Yup, the result of wiring one up to an arduino running klipper and attempting to run a motor over the step/dir pins

unnnnfortunately something is ~funky~, I can get stepper_buzz blinkenlights but the motor doesnt actually get energised or move, and the one I had to bodge is entirely unresponsible
Dead & another friend are suggesting osilloscope em, but that'll have to wait until college next week

[limpid jasper]

Re-wired things, seems to be acting normal on the LEDs when stepper buzzing now?

[eager vessel]

Yeah, looks like a normal sequence now

[limpid jasper]

Oh interesting, when I turn the ATX PSU off, just before totally losing power all four LEDs briefly blink on and I can feel&hear a slight activation of the motor.

[mental pasture]

Sounds like maybe mcu turned off and then caps discharged

[limpid jasper]

Located the potential culprit of the non-bodged driver being funky

[warm ivy]

wooo

[limpid jasper]

Pin 10, VCP for Reservoir capacitor, entirely unsoldered!

[warm ivy]

the left most one and the right most one also look sketchy

[mental pasture]

yeeeep

[limpid jasper]

HOH

HOHOHOHOH

ITS ALIVE

ITS ALIIIIVE

[limpid jasper]

I think I'm going to call the broken-bodged driver a write-off and a reminder to fuck up less, and just use the two A3982s for XY
For Z, an A4988 set to half micro-stepping should perform virtually the same as the A3982 with the sole difference being it sounding different.

[limpid jasper]

Quick n' simple adapter in the same footprint as the original driver, but for an A4988. Decided to drop the on-board 12v->5v LDO, zero point since im using an ATX supply.

[limpid jasper]

oh yeah i love this way too much, im gunna make a little board that I can wire either of the motors on my V0 into to have blinkenlights on the front

[burnt cobalt]

the lights are so neat

[burnt cobalt]

hell yeah

[eager vessel]

Don't you want 2 ports so you don't have to make a weird splice in the motor wiring?

[warm ivy]

and while you are at it add some connectors for an oscilloscope

[limpid jasper]

My idea here was make a second PCB that acts as a Y-splitter since it simplifies wiring somewhat

but it was 2:30am when i posted that so called it a night x3

[limpid jasper]

https://www.mouser.co.uk/ProductDetail/517-SD-RSMT-2-MQ?R=517-SD-RSMT-2-MQ hmn

https://www.lcsc.com/product-detail/SD-Card-Memory-Card-Connector_XUNPU-SD-106M_C266603.html
this oughta do the job, requires adjusting the mainboard some but I expected that.

[limpid jasper]

Working on the lasercutting files in qcad and oh no i actually kind of like this software lol

[autumn crest]

3M… makes SMT parts??

[limpid jasper]

what doesnt 3M make...

[autumn crest]

drugs, probably

[limpid jasper]

BoM now stands at £200
£70 of which comes from Laserply & Acrylic

Yet to be accounted for:

• Kaisan motor cost
• Motherboard cost
• Extruderboard cost
• Endstop cost
• A4988 Adapter cost

[burnt cobalt]

are they charging you for that extruder?

[limpid jasper]

Haven't heard back from them yet.

[burnt cobalt]

rip

[limpid jasper]

To be fair i cant imagine they have the 16 year-old motors easily on hand, and I replied to them mid-day friday their-time and its CNY

I imagine I'll hear back later this week about if they even actually have any still and if so how much I should expect to pay having it shipped from China

[limpid jasper]

Cabled managed the Lenovo PSU, partially

I bundled-up the 3V3 & 5V wiring inside rather than having it flopping around uselessly with SATA on the end outside

Plus sleeved the ATX24 cable- need to buy some smaller diameter sleeve for the other cables

I'll splice the 12v & GND wires with molex connectors to the length I need when I build the Cupcake, I want cleaner wiring than contemporary examples.

[limpid jasper]

holy fuck kysan

£51.60 motor

ouch.

UK Ship Via USPS By Air

AMERICANS HELP
can you sanitycheck if $48 shipping is absurd for US->UK

[autumn crest]

for a motor? yes unless its like, next day priority

lol ship it to my place, i can send it out for you cheapwr @limpid jasper

[limpid jasper]

any specific shipping i should ask them to use?

[autumn crest]

the slowest if you want the cheapest

im not too sure about the speicifcs but that price is insane for a little motor

theyre def tryna make up the cost of just selling one

[limpid jasper]

Sam,

Would it be possible to request the use of a slower-but-cheaper shipping method rather than USPS Air?
I don't require this specific component for some time yet, and the current by-air shipping cost would make this component cost 1/4th of my entire project, which is unfortunately beyond the budget I've set aside for this.

If an alternative shipping method isn't possible, I have a US friend willing to accept delivery of the motor to send over to me later this year.

[autumn crest]

sounds good

[limpid jasper]

asking around in multiple spots the other shipping methods aint really any cheaper

Talking on AHI we have concoted a brilliant plan

i

send it to an american whos going to SMRRF and just have them hold onto it until the event.

[mental pasture]

That works

[limpid jasper]

i ended up just asking around and found a nerd whos in canda whos already shipping shit to a friend here in the UK, whos just gunna ship it to me uk-side

now this does potentially mean US->CAN import plus CAN->UK

[burnt cobalt]

cheaper to get a flight over here

[autumn crest]

ship it to me dawg

[limpid jasper]

https://bsky.app/profile/foosel.net/post/3lgnhorwhk22y
https://fxbsky.app/profile/patrick-ohlson.ms-dot.net/post/3lgnqgapgrc2i
Insane to me how... pristine this dudes ThingOMatic looks

Gina Häußge (@foosel.net)

I've now mounted the front plate and electronics of my first 3d printer into a frame and given it a place of honour in my office. The printer with which everything #OctoPrint started. The printer that literally changed my life.

I think that's a good way to keep it in memory.

Likes

109

Bluesky · Jan 26, 2025, 12:51 PM

I need to look into doing that red colouring for my bot....

[limpid jasper]

my panic'd "OH SHIT THATS A LOT" has reduced the price to $50.5, ~£40
Which is a lot more resonable

[burnt cobalt]

thats a pretty good discount

[limpid jasper]

working more on the electronics today

weeeeee have a problem.

NOBODY stocks the A3949 PWM H-Bridges anymore. They've been discontinued since 2014.

Allegro reccomends the A3950 for subsitution, but it comes in TSSOP as opposed to SOIC

A3949 deets
https://www.allegromicro.com/~/media/Files/Datasheets/A3949-Datasheet.ashx

A3950 deets
https://www.allegromicro.com/-/media/files/datasheets/a3950-datasheet.pdf

seeeeems close enough....

• Change to TSSOP package
• Pinout basically identcal bar addition of NFAULT on Pin 1
• Addition of NFAULT which is to remain NC,
• SLEEP now needs an external pull-up (Might already be provided, have yet to inspect PCB)
• Control logic seems the same

[limpid jasper]

slowly taking shape!

well thats annoying lol

i forgot TSSOP is WAAAAAAAY smaller than SOIC lmao

[limpid jasper]

hmn. just under two weeks now since Kysan last replied to me and I sent money for my motor
worth waiting any longer, sending a "wtf where my motor" email, or should I just open a claim with PayPal

[analog mirage]

I would ask them if they shipped it yet and have a tracking number for you

[limpid jasper]

re: kysan motor mystery
i poked them and they finally gave me the tracking code
the shipping address has the wrong postcode so when they tried delivering it yesterday shit was Borked™️

truly evil for almost-nocturnal nerds like I that the world stops at 6pm,,,,,....

[limpid jasper]

In other news, i was inspecting the "dead" driver and noticed something

[mental pasture]

Hmm

[mental pasture]

Bulging a tad

[limpid jasper]

not really, thats just light

Loooook at the silkscreen and the polarity marking...

the 3D model...

[mental pasture]

Oh.

?bitofanissue

[limpid jasper]

cleaner removal than most retro PC recappers are apparantly capable of lol

[mental pasture]

Oh i didnt even notice, silkscreen trace is right lmfao

[limpid jasper]

installed the cap backwards in my stress to finish the board lol

[mental pasture]

Fair

[limpid jasper]

it didnt revive the driver 😔

[limpid jasper]

the motors here!

It's only 10 years old!

[limpid jasper]

lol annoying issue

The extruder uses a GT2 17T 3mm pulley
Everything I can find is 6mm because who the fuck uses GT2 3mm lol

[autumn crest]

cut 6mm in half

[analog mirage]

https://github.com/lhndo/LH-Stinger/tree/main/User_Mods/MMU/PICO MMU MODS/4mm Belt Cutting Jig- %40zwirbel %40Rigattoni

Pico has a nice little belt cutting jig to turn wider belts to smaller ones

[limpid jasper]

the issue ain't belts!

It's the pulley itself

[autumn crest]

cut it in half

ez

[limpid jasper]

I have Lathe access now at a Makerspace and will be going there tomorrow with some Brass & PTFE to make a start

Re-Did all of mye models & drawings

[burnt cobalt]

omg

[limpid jasper]

ill be posting pictures n shit tomorrow to #subtractive-manufacturing

[eager vessel]

I still don't think that this nozzle will seal tbf

[limpid jasper]

ahah thats where you're wrong

for!

makerbot has an INNOVATIVE solution!!!!

...

Teflon tape.

You were supposed to Teflon tape your hotend in 2008,

lmfao

[maiden ether]

ah, the good ol drill and file approach

and also, deadly neurotoxin

https://www.thingiverse.com/thing:9234 never not relevant

[limpid jasper]

hmn lets see, another visit to the makerspace, another visit coming home without a nozzle for the cupcake
Costs about £20 per visit

And i need one or two visits to make a single part with my current familiarity with their equipment

• i need numerous trips to practice with their equipment more to actually make the hotend

According to JLCNC it'd cost about £65 GBP to have them CNC the nozzle & heaterbarrel

so.. 3 trips to the makerspace.

i thiiiiiiiiiiiiiiiiiiiiiiink

i might just pay JLCNC

oh shit i can make it cheaper if i use alu

Heater Barrel, H59 Brass: $42.06
Heater Barrel, 6061 Aluminium: $35.62

eeh that only drops it down to £59.67

[maiden ether]

i mean, how historically accurate are you thinking anyway?

[limpid jasper]

@odd depot

Going to be doing more work on this after college finishes for summer this week

[odd depot]

[robust coyote]

good luck

[limpid jasper]

Just ordered PCBs

Didn't originally want an A4988 adapter but I broke one of the boards that has the original ICs and theyre expensive

[burnt cobalt]

um pera

don’t dox yourself

@limpid jasper

[limpid jasper]

oop

[burnt cobalt]

i’m gonna go around telling everyone you live on 🟥 🟥 🟥 🟥 street now