hotend being annoying after pid tune | 3D Printing | Page 1

blazing arrow Oct 5, 2024, 7:30 PM

#

Help

daring moonBOT Oct 5, 2024, 7:30 PM

#

blazing arrow Help

#

AI Help

Of course, I'm here to help! What do you need assistance with regarding 3D printing?

blazing arrow Oct 5, 2024, 7:30 PM

#

E3v2 mriscoc custom fw

#

Tz v6 2.0 hotend with some customizations

#

Doing this after a pid tune

#

This is before pid tune

obsidian spruce Oct 5, 2024, 7:34 PM

#

blazing arrow This is before pid tune

Did you tune with the fan on or off

blazing arrow Oct 5, 2024, 7:37 PM

#

obsidian spruce Did you tune with the fan on or off

I have tried everything

#

Hitend fan on

#

Hotend fan off

#

Parts fan on/off

obsidian spruce Oct 5, 2024, 7:38 PM

#

Have you been doing M500 after

blazing arrow Oct 5, 2024, 7:38 PM

#

Yea

#

And it has an auto tune in the fw

obsidian spruce Oct 5, 2024, 7:38 PM

#

Is the thermistor the same one used in a stock printer?

blazing arrow Oct 5, 2024, 7:39 PM

#

No, but i updated it in the fw

obsidian spruce Oct 5, 2024, 7:39 PM

#

Or did you update it when you built the firmware I mea

#

Okay good

blazing arrow Oct 5, 2024, 7:39 PM

#

It's some random Chinese one lol

#

Put the thermistor in with thermal paste

obsidian spruce Oct 5, 2024, 7:39 PM

#

Honestly the speed it's heating seems too high to me

#

Almost like the thermistor is directly against the heater or something

blazing arrow Oct 5, 2024, 7:40 PM

#

It does heat rapidly at the start

blazing arrow Oct 5, 2024, 7:40 PM

#

obsidian spruce Almost like the thermistor is directly against the heater or something

I mean it's a bambu clone so it's close

obsidian spruce Oct 5, 2024, 7:40 PM

#

Yeah but even 220 to 240 showed an instantaneous response

#

It should have some amount of delay

blazing arrow Oct 5, 2024, 7:40 PM

#

Let me take pic

obsidian spruce Oct 5, 2024, 7:40 PM

#

But regardless, something is up with PID

#

Does Mrisoc have the option to use MPC temp control instead?

#

Wondering if it would be more stable with a higher powered hotend

blazing arrow Oct 5, 2024, 7:44 PM

#

obsidian spruce Wondering if it would be more stable with a higher powered hotend

I'm getting a 80w heater soon

#

It came with a 48w only

#

rn_image_picker_lib_temp_ee04088a-4d21-4dcd-8d7e-aa5d160af402.jpg

obsidian spruce Oct 5, 2024, 7:44 PM

#

That's an insane increase in temp for just 48W

blazing arrow Oct 5, 2024, 7:44 PM

#

blazing arrow Oct 5, 2024, 7:45 PM

#

obsidian spruce That's an insane increase in temp for just 48W

Like you said thermistor is close to the heater

obsidian spruce Oct 5, 2024, 7:45 PM

#

Too close imo

blazing arrow Oct 5, 2024, 7:45 PM

#

Should I swap the side that the heater is on

obsidian spruce Oct 5, 2024, 7:45 PM

#

If I knew much about that hotend I'd say yes but I really don't

#

But I bet that the thermistor location is hugely problematic

blazing arrow Oct 5, 2024, 7:46 PM

#

obsidian spruce Too close imo

#

The heater is on the back side

#

So it's like .5mm away

#

At most

blazing arrow Oct 5, 2024, 7:51 PM

#

blazing arrow

@half granite what side does the heater cart go on?

fierce minnow Oct 5, 2024, 7:55 PM

#

obsidian spruce Does Mrisoc have the option to use MPC temp control instead?

Mrisoc only uses MPC

#

They deprecated PID

hasty hound Oct 5, 2024, 7:58 PM

#

Pls help I am begging you

obsidian spruce Oct 5, 2024, 7:59 PM

#

fierce minnow Mrisoc only uses MPC

That's friggin awesome

obsidian spruce Oct 5, 2024, 7:59 PM

#

hasty hound Pls help I am begging you

This is not your help forum.

fierce minnow Oct 5, 2024, 7:59 PM

#

hasty hound Pls help I am begging you

That's the wrong post

blazing arrow Oct 5, 2024, 7:59 PM

#

obsidian spruce This is not your help forum.

I've been hijacked lol

obsidian spruce Oct 5, 2024, 8:00 PM

#

And Derra does not take kindly to it.

blazing arrow Oct 5, 2024, 8:00 PM

#

obsidian spruce That's friggin awesome

Wait what's the difference between mpc and pid

obsidian spruce Oct 5, 2024, 8:00 PM

#

One is dumb one is smart

blazing arrow Oct 5, 2024, 8:00 PM

#

obsidian spruce And Derra does not take kindly to it.

It's whatever I'm more confused

obsidian spruce Oct 5, 2024, 8:01 PM

#

Basically MPC is reactive to temperature fluctuations and does things based on a calculated model - it knows how much power the heater outputs, the heat capacity of the filament, the effects of cooling on the hotend when it's trying to heat

#

Model Predictive Control

#

If it doesn't have the right values for the heater it gets confused

blazing arrow Oct 5, 2024, 8:01 PM

#

Does it still use kp ki and kd values?

obsidian spruce Oct 5, 2024, 8:01 PM

#

I don't believe so, it has different ones

blazing arrow Oct 5, 2024, 8:02 PM

#

obsidian spruce If it doesn't have the right values for the heater it gets confused

Does that mean I need to update it in fw if I change the heater tpye?

obsidian spruce Oct 5, 2024, 8:02 PM

#

Should have a config menu for it

blazing arrow Oct 5, 2024, 8:02 PM

#

obsidian spruce I don't believe so, it has different ones

Odd, mine still shows the pid values

blazing arrow Oct 5, 2024, 8:02 PM

#

obsidian spruce Should have a config menu for it

Yep and it does auto tune with m303 commands

obsidian spruce Oct 5, 2024, 8:03 PM

#

blazing arrow Odd, mine still shows the pid values

Then you're on Pid not MPC

blazing arrow Oct 5, 2024, 8:03 PM

#

Hmm

obsidian spruce Oct 5, 2024, 8:03 PM

#

MPC autotune has its own menu

blazing arrow Oct 5, 2024, 8:03 PM

#

Let me scroll through fw in a bit

obsidian spruce Oct 5, 2024, 8:03 PM

#

You can only have one enabled

#

Marlin won't compile with both enabled

blazing arrow Oct 5, 2024, 8:03 PM

#

Odd I'm on mriscoc

#

Maybe it has both

obsidian spruce Oct 5, 2024, 8:03 PM

#

It can't

#

Well it can run PID for Bed I suppose

#

But MPC for hotend would remove your autotune menu for pid

fierce minnow Oct 5, 2024, 8:08 PM

#

blazing arrow Odd I'm on mriscoc

What version?

#

And for what board

#

I looked up and I think most if not all use MPC

blazing arrow Oct 5, 2024, 8:09 PM

#

fierce minnow What version?

Newest as far as I know, and skr

fierce minnow Oct 5, 2024, 8:09 PM

#

Latest release

#

I think the SKR might be the only one that doesn't have MPC

#

And the S1 maybe?

blazing arrow Oct 5, 2024, 8:10 PM

#

fierce minnow Latest release

I made custom

fierce minnow Oct 5, 2024, 8:10 PM

#

Aha

blazing arrow Oct 5, 2024, 8:10 PM

#

I'll see if I can enable it

blazing arrow Oct 5, 2024, 8:10 PM

#

fierce minnow Aha

I need to for my display type

fierce minnow Oct 5, 2024, 8:11 PM

#

blazing arrow I need to for my display type

You lost the display lottery?

blazing arrow Oct 5, 2024, 8:11 PM

#

fierce minnow You lost the display lottery?

Tjc display

#

Legit the e3v2 website says "not much is known about this display type"

topaz depot Oct 5, 2024, 8:21 PM

#

Still don't know why everyone can't pid tune these hotends🤷. Use isolation and be done with it.

obsidian spruce Oct 5, 2024, 8:21 PM

#

I think it's because of the proximity of thermistor to the heater

#

It heats the thermistor up way faster than it does the actual hotend

topaz depot Oct 5, 2024, 8:29 PM

#

🤷

obsidian spruce Oct 5, 2024, 8:42 PM

#

topaz depot 🤷

Is yours the $3 version? Wondering if it's just this one that is weird

topaz depot Oct 5, 2024, 8:42 PM

#

obsidian spruce Is yours the $3 version? Wondering if it's just this one that is weird

I think it was 8€ with everything

#

the literal bambu hotend clone

#

black square heatsink

blazing arrow Oct 5, 2024, 8:47 PM

#

Ok @obsidian spruce i can enable mpc should i?

obsidian spruce Oct 5, 2024, 8:47 PM

#

I would.

blazing arrow Oct 5, 2024, 8:48 PM

#

Do I need to update my heater type anywhere?

#

rn_image_picker_lib_temp_4b9737f6-c0f4-4c20-b6fe-003460131f3e.jpg

blazing arrow Oct 5, 2024, 8:54 PM

#

blazing arrow

@obsidian spruce can you decipher some of this lol

obsidian spruce Oct 5, 2024, 9:04 PM

#

blazing arrow

Enable the autotune menu and then run the autotune

#

It so update those values

#

I have no idea what they would be for that hotend

blazing arrow Oct 5, 2024, 9:05 PM

#

obsidian spruce Enable the autotune menu and then run the autotune

I mean do I need to edit the mpc max or heater power

obsidian spruce Oct 5, 2024, 9:05 PM

#

But basically heat capacity is how much heat the whole holds, the transfer coefficient is how fast it cools, responsiveness is the speed of which turning on the heater causes a change at the thermistor iirc

blazing arrow Oct 5, 2024, 9:05 PM

#

Oh no, 255 means max

obsidian spruce Oct 5, 2024, 9:06 PM

#

blazing arrow I mean do I need to edit the mpc max or heater power

Heater power yes

blazing arrow Oct 5, 2024, 9:06 PM

#

For the heater power do I change that to 48f

obsidian spruce Oct 5, 2024, 9:06 PM

#

You know you have a 48W hotend

#

Yes

#

And then you'd have to update for an 80W

blazing arrow Oct 5, 2024, 9:07 PM

#

Cool

obsidian spruce Oct 5, 2024, 9:07 PM

#

Unless the menu has the option to change after build, can't remember

#

Either way the other values will be calculated with an autotune

blazing arrow Oct 5, 2024, 9:07 PM

#

Do I want to run it with fans

rn_image_picker_lib_temp_72a719de-5ec7-4a78-b08b-073a91dcf4a4.jpg

obsidian spruce Oct 5, 2024, 9:08 PM

#

I believe so, sorry I have not built it in a while

blazing arrow Oct 5, 2024, 9:17 PM

#

obsidian spruce I believe so, sorry I have not built it in a while

That's alright, I swapped the heater sode and it's heating a lot slower

#

So that's good

#

Still hits 285

blazing arrow Oct 5, 2024, 9:41 PM

#

obsidian spruce I believe so, sorry I have not built it in a while

Thank you so much, it heats smoothly and hits the temp I need

obsidian spruce Oct 5, 2024, 9:41 PM

#

Sweet! Awesome to hear

blazing arrow Oct 5, 2024, 9:42 PM

#

Uhhh how do I close this

obsidian spruce Oct 5, 2024, 10:23 PM

#

?solved

daring moonBOT Oct 5, 2024, 10:23 PM

#

Permission Denied

@obsidian spruce either you dont have permission to use ?solved or you're in the wrong channel!
Use ?help for a list of commands for which you have permission to use.

obsidian spruce Oct 5, 2024, 10:23 PM

#

@blazing arrow

blazing arrow Oct 5, 2024, 10:23 PM

#

?solved

#hotend being annoying after pid tune