Prusa MK4S acceleration
Hello,
I am writing to this forum as a last beam of hope; my friend and I built an interface that lets us play music by sending G-code messages from Max/MSP in real time through a serial port. We absolutely love the musical results! However, one major terrifying issue is that our printer's (Prusa MK4s) printhead stops immediately when executing some G0 commands, especially when moving diagonally on XY axes. The frustrating part is that we made it work with random trials of various commands and factory resets, but we were unable to find a sequence of tasks to do in order to put the printer in a state that is usable. Here are some of our findings:
- after countless tests we found out it might have to do with acceleration settings;
- commands like (M201 X90000 Y90000 Z5000 E500), (M203 X60000 Y60000 Z30000 E10000) and (M205...) with combinations of M500 were tested - some arbitrary high numbers were used, we don't know if there are upper bounds to these;
- factory reset helped once, it didn't the next time;
- the angle at which the printhead moves plays a role, I believe this is because it is the motor on Y axis causing this;
The issue is that there are simply countless variables on what could be set and tested and given the time it takes to test the XYZ axes each time the printer halts (and therefore thinks "home" is at a completely different position), combined with ~6 minutes it takes to make the factory reset, it has felt like a complete waste of many hours over the span of several days.
We would absolutely appreciate if someone has had an experience with this issue previously and could at least hint on a direction we could take.
RE: Prusa MK4S acceleration
I'm a bit confused. How is the music related to the printer problem?
Can you upload a zip compressed 3mf project that displays the problem you're having so we can check your settings?
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE:
I'm a bit confused. How is the music related to the printer problem?
Can you upload a zip compressed 3mf project that displays the problem you're having so we can check your settings?
That's simple. The user doesn't want to print anything, he just uses the printer for crap it's not designed for. It uses the sound that motors make when moving. The greater the speed of movement and acceleration, the higher the tone the engines emit. Well, at certain moments, it overcomes the limitations that the machine is equipped with in the machine's firmware and it understandably stops. And since this has nothing to do with the press, I don't think it's worth giving any advice.
RE: Prusa MK4S acceleration
I'm a bit confused. How is the music related to the printer problem?
Can you upload a zip compressed 3mf project that displays the problem you're having so we can check your settings?
Thank you both for your replies; Indeed, exactly as miroslav mentioned, apart from general printing (which works perfectly fine and we have already printed several objects with it), we are intentionally trying to use the printer for what it isn't designed to, and to simply use series of G0 commands in order to use the 3d printer as a musical instrument.
This, naturally, means that people might be angered by this because we are trying to overcome something inherent to the printer (and for a valid reason), but the musical results have been absolutely amazing (and we have already published an album) to the point we're willing to try all the options in order to make it work.
Because this isn't directly related to printing (which, as said, works just fine), we're expecting that it's quite unlikely somebody would be able to at least give directions, but we thought to give it a shot anyway. The unfortunate part is that we actually did manage to overcome the printer's limitations several times, but because we always managed to make it work after hours of testing and resetting, it is difficult to tell what the exact ingredients to make it work are - and that is, unfortunately, frustrating.
I will be likely making further tests tomorrow and again try out commands M201, M203 and M204 with values that closely resemble the mechanical limits of the motors.
RE: Prusa MK4S acceleration
“It’s not a bug - it’s a feature!”
😉
MK4S/MMU3