Low quality motors?
So i have very bad vibrations/resonance during some moves of the gantry during printing. Im pretty sure, the vibrations are coming from my back right x/y motor.
According to this video, Nathan/Ston-3D, creator of the Nextruder, said that Prusa switched from LDO made motors to some other manufacturer.
Im wondering, if those of us with noisy printers just are victims of bad QA from the motor manufacturer and if changing out the motors would maybe help with the noise. Do you think there is any chance that Prusa support might replace bad-performing motors as part of warranty?
RE: Low quality motors?
My guess is that support will refer you to a future firmware release which is hoped to provide smoother motor operation.
The firmware team is indeed working on "calibrated phase stepping", which has made the XL quieter before. But they have not been able to get it to work reliably on the Core One over the past three months
RE:
Yeah I've also been following the Github repo, but I dont like the idea of slapping on a firmware fix to suppress underlying issues of the hardware. And I know that there are good motors out there, since not everyone has this problem and my right motor is way worse than the left.
I'll try my luck with support later this week. If they are unhelpful, i'll look into getting another motor elsewhere maybe. I like my Core One all in all and almost have it where I want it, so not about to give up on it, yet.
P.S. new firmware 6.3.3 just dropped, still no phase stepping calibration option 🙁
RE: Low quality motors?
P.S. new firmware 6.3.3 just dropped, still no phase stepping calibration option 🙁
No improved robustness of Z or XY homing either. 🙄
RE: Low quality motors?
Yeah I've also been following the Github repo, but I dont like the idea of slapping on a firmware fix to suppress underlying issues of the hardware. And I know that there are good motors out there, since not everyone has this problem and my right motor is way worse than the left.
I'll try my luck with support later this week. If they are unhelpful, i'll look into getting another motor elsewhere maybe. I like my Core One all in all and almost have it where I want it, so not about to give up on it, yet.
P.S. new firmware 6.3.3 just dropped, still no phase stepping calibration option 🙁
The wizard now works, but still isn't in the menu. I ran the wizard by sending gcode M1977 from OctoPrint. At first observation, the printer sounds quieter. Will run a print over night to see if there is improvement..
RE: Low quality motors?
This is interesting. If true we would see something different from all of the conversion kit people, who would be upgrading with LDO motors, no? 🙂 (in fact the MK4S I'm converting has LDO branded .9 steppers due to the fact you couldn't get the Prusa branded ones early on in the MK4 release if you wanted to convert a 3.9 to a 4).
I've run the phase stepping calibration as well (showed over 80% improvement on both motors). Trying some prints now, as the other poster said, I do notice printing moves are quieter (similar to running it on the XL).
So i have very bad vibrations/resonance during some moves of the gantry during printing. Im pretty sure, the vibrations are coming from my back right x/y motor.
According to this video, Nathan/Ston-3D, creator of the Nextruder, said that Prusa switched from LDO made motors to some other manufacturer.
Im wondering, if those of us with noisy printers just are victims of bad QA from the motor manufacturer and if changing out the motors would maybe help with the noise. Do you think there is any chance that Prusa support might replace bad-performing motors as part of warranty?
RE: Low quality motors?
@baatbyggeren:
Thanks for trying. Have you tried going back to stock with the other gcode command?
@darksharpie:
That's what I'm wondering as well. We will have to see when more people have done the conversion, if any of them reports resonance or not. If not, I may just scour the Internet for genuine ldo motors to replace my crappy ones...
RE: Low quality motors?
@baatbyggeren:
Thanks for trying. Have you tried going back to stock with the other gcode command?
@darksharpie:
That's what I'm wondering as well. We will have to see when more people have done the conversion, if any of them reports resonance or not. If not, I may just scour the Internet for genuine ldo motors to replace my crappy ones...
Someone on Reddit seems to have proven that it was his X axis motor that produces resonance noises by unpluging X or Y motor one after the other. When unpluging X motor while printing (without filament) the resonance stopped.
I'm wondering if it's a common issue or if everybody is affected by this issue/bad motor... or if it's possible to have a printer with both good motors.
RE:
I'm wondering if it's a common issue or if everybody is affected by this issue/bad motor... or if it's possible to have a printer with both good motors.
I can personally vouch for the fact that it's possible to have a printer with both (all) good motors. Mine is smooth and quiet in all directions.
Kits versus factory-built perhaps? My kit-built printer had most of the motors in one box (the 'Motors set' box) and one elsewhere (one of the z-motors was in the 'electronics & chamber parts' box), and there was speculation that this is because those in the Motors set box were packed for the MK4/4S. Maybe those pre-date Prusa's switch from LDO? And maybe the factory builders take from an un-boxed supply of the new motors?
RE: Low quality motors?
My kit-built printer had most of the motors in one box (the 'Motors set' box) and one elsewhere (one of the z-motors was in the 'electronics & chamber parts' box), and there was speculation that this is because those in the Motors set box were packed for the MK4/4S. Maybe those pre-date Prusa's switch from LDO?
Going by photos I see on the internet, the LDO motors are labelled with the LDO brand. (In small print, besides the larger Prusa logo.) I don't see that on the stepper motors which came with my kit.
That does not rule out the possibility that Prusa may still have sourced motors from LDO after implementing the new QR-coded prints, without the LDO designation, of course. But I am not sure whether they ever sourced 0.9° motors from LDO or whether that design change coincided with a supplier change?
RE: Low quality motors?
I can personally vouch for the fact that it's possible to have a printer with both (all) good motors. Mine is smooth and quiet in all directions.
Quiet in 0.2 structural profile? My printer and many others hit bad resonance noises at 80mm/s on straight X/Y movements (80mm/s is standard inner wall speed).
RE: Low quality motors?
Yeah, there's no sign of LDO branding on my CORE One motors. But the same goes for the motors on my MK4 and MK4S. The MK4S started life as a MK3S+, I'll have to dig out the motors that I removed from the 3S+ to check, but I don't recall ever seeing LDO branding on them - could be wrong though.
RE: Low quality motors?
I can personally vouch for the fact that it's possible to have a printer with both (all) good motors. Mine is smooth and quiet in all directions.
Quiet in 0.2 structural profile? My printer and many others hit bad resonance noises at 80mm/s on straight X/Y movements (80mm/s is standard inner wall speed).
Yes, quiet on 0.2mm Structural.
RE: Low quality motors?
I’m really glad to see that it’s possible hahaha!
Now to find a supplier to buy good motors that’s are compatible out of the box without having to change anything else… (if the kit I will get in a month has indeed bad motors).
I returned my preassembled printer back because of resonance noises I couldn’t accept and really bad VFA.
RE: Low quality motors?
That's my experience as well. My Prusa branded motors (assembled MK4, and MK3->MK4 upgrade kit) do not have LDO on them.
I was one of the people who got the "free" 3.9 upgrade after the delayed release of the 3.5. And I wanted to just go ahead and order .9 steppers since they weren't yet available from Prusa as parts. So I found some LDO's with similar specs on Printed Solid and ordered them. They ran in my MK4 -> MK4S for many months. No noticeable difference from my Prusa assembled MK4. Also did something similar at work (two MK4s, one with these motors, one with Prusa steppers) - no noticeable difference. Now they're in my CORE One conversion kit printer.
Result? Much louder than my Prusa brand motors in my Assembled CORE One. 😀 And the pre-release phase stepping fails on them (not sure if it's some difference it detects vs. the Prusa motors, or if it's just because the calibration is still in alpha so it's just still buggy).
Just an anecdote, getting seemingly less desirable performance from my actual LDO branded motors 😉
Yeah, there's no sign of LDO branding on my CORE One motors. But the same goes for the motors on my MK4 and MK4S. The MK4S started life as a MK3S+, I'll have to dig out the motors that I removed from the 3S+ to check, but I don't recall ever seeing LDO branding on them - could be wrong though.
RE: Low quality motors?
Do you know what to check to be sure it’s compatible with Prusa?
If my CORE One kit seem to have bad motors I will try to buy some.
RE: Low quality motors?
The one of the motors is in the electronics box is a MK4S to CoreOne conversion kit. As the CoreOne has 1 more z motor, it is supplied in the box.
I'm wondering if it's a common issue or if everybody is affected by this issue/bad motor... or if it's possible to have a printer with both good motors.
I can personally vouch for the fact that it's possible to have a printer with both (all) good motors. Mine is smooth and quiet in all directions.
Kits versus factory-built perhaps? My kit-built printer had most of the motors in one box (the 'Motors set' box) and one elsewhere (one of the z-motors was in the 'electronics & chamber parts' box), and there was speculation that this is because those in the Motors set box were packed for the MK4/4S. Maybe those pre-date Prusa's switch from LDO? And maybe the factory builders take from an un-boxed supply of the new motors?
RE: Low quality motors?
I'm waiting for someone to grab a couple of LDO NEMA 17 Motor LDO-42STH48-2504MAC(F)s, whack them in, and see what happens.
I heard the accusation, but have not heard a response. Going for yumcha over LDO would be pretty disappointing, especially from a premium EU manufacturer.
Would also be nice to see the two motors go head to hear, the LDO and the yumcha. For the sake of saving a few bucks on a $1200 printer, seems stingy AF.
RE: Low quality motors?
Prusa should be resolving this - whether that's by firmware or by replacing motors. Customers should NOT need to replace motors or any other parts from their own pocket, and I simply refuse to do so.
I have a H2D sitting, still boxed, at home at the moment. Will be checking that for noise/VFAs with a couple of test prints. If a relative newcomer can do this, I'd expect the same, if not more, from Prusa, who are in comparison, veterans to the 3D Printing market.....
RE: Low quality motors?
Some motors are defective and Prusa should take more care about the motors checking... It's not a 300€ printer...
I contacted the support team for a X motor replacement because this one was so hard to turn by hand and created lot of bad vibrations.
After 3 days of "fight", they finally sent to me a new X motor.
I let you see the result:
Before: https://www.youtube.com/shorts/kEIA9auzH8Q
After: https://www.youtube.com/shorts/JOt_KkPB_lw
And the remaining vibrations went aways by increasing the belt tension (85hz to 105hz).