devon.b3
Posts: 4
Joined: Fri Dec 22, 2017 4:17 am
Contact: Send private message

Multimaterial Upgrade - Extruder Calibration Per Extruder

Mon Feb 12, 2018 3:53 pm

Hi Guys/Gals,

So i'm trying to get started with HIPS as a support material and have been having some issues with it clogging in the multiplexer. The HIPS doesn't retract fully and sits there until it mushrooms on the end which means it can't be unloaded since it's jammed in the multiplexer. So my first thought of course was to check that E4 is calibrated and extruding/retracting correctly so I started on Extruder 1 using this guide (https://mattshub.com/2017/04/19/extruder-calibration/) and all was well. I was able to save the correct E-step value using M500 and reset the machine to confirm it stuck for Extruder 1.

My question for you Gurus is how do I check and calibrate the rest of the extruders? I've changed extruders in the printer settings but my M503 just spits back the setting that were saved for E1.

I've cruised around the forums and found one post that basically came down to "check your extruder screw tension"....which of course I have and didn't seem to answer the OP's original question that was similar to mine.

Thanks for the help!

User avatar
PJR
Posts: 4504
Joined: Mon Jun 01, 2015 6:37 am
Topics answered: 19
Location: Kamnik, Slovenija
Contact: Send private message Website

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Mon Feb 12, 2018 7:17 pm

The Bondtech drive pulleys should be pretty much spot on for all 4 extruders; basically there should be very little difference (if any).

If you find there is a significant difference, there is not a lot you can do other than to run KISS + post-processor which does allow individual extruder calibration.

Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss.

devon.b3
Posts: 4
Joined: Fri Dec 22, 2017 4:17 am
Contact: Send private message

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Mon Feb 12, 2018 8:18 pm

Thanks for the reply Peter!

So in theory if E1 is calibrated then the rest should be as well? It was close, but not quite spot on...extruded 98.4mm in a 100mm run.

paul.p13
Posts: 18
Joined: Thu Jul 27, 2017 3:54 pm
Contact: Send private message

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Mon Feb 12, 2018 8:36 pm

PJR wrote:
Mon Feb 12, 2018 7:17 pm
If you find there is a significant difference, there is not a lot you can do other than to run KISS + post-processor which does allow individual extruder
You could also do this with Simplify3D and filaswitch post-processor by adding appropriate e-steps gcode to the tool change script. Just for completeness. :)

jean-marc.t
Posts: 15
Joined: Sat Nov 25, 2017 8:12 pm
Contact: Send private message

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Tue Feb 13, 2018 7:59 am

Imho, each "extruder" have to be calibrated since filament feed is unlikely to be exactly the same for every motor.

That being said, I'm not sure you can set a per extruder stepping.

morten.e2
Posts: 6
Joined: Mon Oct 16, 2017 10:43 pm
Contact: Send private message

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Tue Feb 13, 2018 1:21 pm

What is the actual default E steppes for the bondtech MMU setup, 140 ?
Tried to look at the the sourcecode, but there seems to be so many version of it :/

jean-marc.t
Posts: 15
Joined: Sat Nov 25, 2017 8:12 pm
Contact: Send private message

Re: Multimaterial Upgrade - Extruder Calibration Per Extruder

Tue Feb 13, 2018 2:03 pm

Mine was indeed 140, not sure it is the default value for everybody. I use Hyperfine modded firmware, maybe this is different here.

Return to “Original Prusa i3 MK2 Multi Material”

Who is online

Users browsing this forum: No registered users and 4 guests