Hash Printer

[alpine nest]

some stupid idea that ive had floating around for a while
its pretty much a Money sink from just specing it
Planned specs:
330x330x400 build Volume
Cross Gantry setup
3 point Bed
each side of the Cross rails independent driven to allow for automatic unracking when homing
running RRF
entire bed covered by each toolhead

https://www.youtube.com/watch?v=tzf8903FvCs This video explains the hash motionsystem implementation for people that dont know about it

[vagrant meadow]

the quad mirrored print is genius

[alpine nest]

i hope this tensioner works, where annoying enough to get a idea on how to route 2 pair of belts next to each other and how to tighten them somehow

and thats the easy axis, the X axis will be fun

[vagrant meadow]

i can see you've been thinking about this for a while 👍

[sterile briar]

Whoooow

[alpine nest]

looks like i have to add spacers to the sides if i want to enclose the printer and keep double shear mounts for the Stepper

[alpine nest]

in the progress of redesigning the entire beltpath to have a easier time overall with routing belts

[alpine nest]

got half the X Axis Motionsystem now drawn up, changed a few bits here and there

i try to keep stuff reuseable where possible, the 4 bearing blocks and stepper mounts for the X axis are the same on each corner, just the stacking of the Pulleys for the Active idler and Stepper change

[hard gorge]

yaaaaaaas

[solemn aspen]

ballscrew2s?

[alpine nest]

No

[solemn aspen]

aw

[alpine nest]

im not made of money and i expect to spend on the mainboards alone close to 500€

[solemn aspen]

Is it a pc?

[alpine nest]

no

just duet hardware

[hard gorge]

How many steppers do you need?

Should get by with two Duet 3 mini+ with the 2+ expansion, one in can-fd expansion mode

That’ll provide 14 steppers

Which is not enough you need 15

So three duet 3 mini (that would be less than 500)

Unless you want toolboards for the print head

Then two duet 3 mini, one with 2+ expansion, and 4 roto tool heads

(That would be more than 500)

[alpine nest]

15, plan where to grab a 6HC with 2 3HC and 4 1LC

just endstops will probably maxout the IO pins on the 6hc...

[hard gorge]

Unless you need the 2160s, take one mini 5 instead of the 3HCs

You know you can use some of the outputs as inputs right?

Also how many endstops will there be? One per axis?

If you use the 1LCs put the endstops on the toolheads

[alpine nest]

One per stepper

[hard gorge]

That ain’t working with RRF

Only one endstop per axis

You can have extra endstops if you want them to trigger events to stop the machine later during operation when they get triggered

(Also you can use out pins als inputs)

[alpine nest]

I run 2 endstops on my idex rn and it works? Or does it not support it outside of z axis? Because sensorless it also works

(on the k3)

[hard gorge]

the idex has one for X and one for U axis

its just a single physical rail

oh wait

you have four heads

each needs to home individually in global X and Y

but it will be one each for

XYUVWABC

(you could use dual endstops on ome physical rail for auto squaring , and then pair the axis homing per pair of extruders, still eight endstops)

[alpine nest]

That where the plan auto squaring.
Also the dual endstops on my idex are in z for the same purpose

[hard gorge]

Yeah but those are combined for one end

[alpine nest]

Will postpone the headache to figure that out to the day i get around building it

[alpine nest]

@desert sun ^above is a reason for RRF to remap Axis during a print

[hard gorge]

still unconvinced that axis remapping is needed

[alpine nest]

so i didnt liked the X axis stepper mounting solution.
since i can order parts from laserhub over my workplace im considering to get 2 10mm steel Halos made

now the challenge is to figure out how to get bearings securely installed onto that, cant machine fitments for them at work because the plate is to large for our current mills

(also it has been a year lol)

[final flare]

holy shit this is insane

[alpine nest]

hmm i like this a lot better than the original implementation
not sure if tossing 200€ worth of igus stuff on it will be the way tho

also opted for a bit beefier linear rods, the original ones might have worked but i like this better, fits the look of the machine a bit more too

[alpine nest]

we will see if it will be insane

[desert sun]

Its most definitely insane, in the best possible way

[alpine nest]

getting the halo plates made is a lot cheaper than expected.
might have to make the lower plate 2mm thinner but then i can get it lasercut for 165€ (considering its rn 660x660x8mm thats really good)

[vast mural]

Holy shit.

I'll finish Splenda just so I can call u out if u don't finish this I love it

[alpine nest]

Idk if it ever will be finished

[vast mural]

Coward

[alpine nest]

My folk is known to be slow, it took them 632 years to finish a single building

[alpine nest]

@lapis bone got a smart idea in how to secure a Bearing inside a lasercut stainless plate?
rn i would go with a printed holder that gets pressed into the holt to make it a somewhat tight fit.

[lapis bone]

I'd laser cut a pilot and drill it out (optimally ream, but that's effort) so I can glue the bearing in, that's the lowest effort solution that should still give you full performance

[alpine nest]

reaming would be a bit annoying, also a 20mm reamer is quite a bit of a ask tbh

drilling that would be already annoying in stainless.

sadly the lasercut parts are to large for the mills at work, otherwise that would be the obvious solution

[lapis bone]

I'm afraid that plastic is just too squishy and compliant

[alpine nest]

yea thats my concern too

maybe i just make it match in CAD and hope the laser is reasonable accurate enough to get some sort of fitment

[lapis bone]

I assume they don't list tolerances?

[alpine nest]

they do +-0.3

a tad to loose for just gluing it imo

[lapis bone]

Way too loose, you don't want a 0,3 mm gap to be bridged

[alpine nest]

making it 26mm and installing a brass bushing might work

its soft enough to drill it open again i guess

[lapis bone]

Tbf I don't have any experience with reaming on my own, especially reaming stainless, so I just don't know how bad it is

[alpine nest]

reaming stainless is annoying
and a 20mm one will need some beefy drillpress

sadly i cant find any flange bearings with a 5mm bore, otherwise that would be one way to go i guess

[lapis bone]

F625?

[alpine nest]

i think thats badly translated, a bearing with a housing and a screw on flange

[lapis bone]

I wonder if you could machine your own bearing blocks at work, that's the preem solution

[lapis bone]

Ah, bearing block

[alpine nest]

hmm maybe i can just take the printed holder i have designed rn but get it SLM printed out of alu and open up the hole it sits in a bit

the holder is screwed onto the plate ive wanted to fit it in so the plate would take the load

[lapis bone]

AliX has these, but dunno if they're any good
https://a.aliexpress.com/_EJffmTa

[alpine nest]

yea thats about what i would also get printed,

i do prefer to buy something that exists, makes it easier to source in case it ever gets on the internet

ahh yes the rotary voltage regulator