Notifications
Clear all

Phantom Y Crashes  

  RSS
Dave G
(@dave-g)
Eminent Member
Phantom Y Crashes

Need some advice on this (unrelated to the Y axis issue I had a few days ago).

New printer, just assembled.  Self-test is fine, calibration is fine, and it prints fine.  Currently printing PETG on the textured sheet like a champ except that it reports Y crashes all the time.

I've watched it when this is happening, and the cable sleeves are not touching, bearings feel fine on the rods, resistance seems normal and consistent when moving the Y axis manually, belt status for the Y belt is 260.  It recovers from the error just fine, and prints are finishing, but I am getting 5 Y-crashes detected within the first two hours of printing.

What else should I check?

Posted : 03/03/2020 1:12 am
Epic Space Models
(@epic-space-models)
Active Member
RE: Phantom Y Crashes

Verify that the smooth rods are not damaged. This can happen even on new printers if you were unlucky. If you see any grinding on the smooth rods, contact Prusa support and ask them to send you new rods.

Damaged rods increase the friction between the rods and the bearings, and sometimes this  is enough to trigger the crash detection.

I had the problem on two brand new MK3S...

Posted : 03/03/2020 4:20 am
Dave G
(@dave-g)
Eminent Member
Topic starter answered:
RE: Phantom Y Crashes
Posted by: @epicspacemodels

Verify that the smooth rods are not damaged. This can happen even on new printers if you were unlucky. If you see any grinding on the smooth rods, contact Prusa support and ask them to send you new rods.

Damaged rods increase the friction between the rods and the bearings, and sometimes this  is enough to trigger the crash detection.

I had the problem on two brand new MK3S...

Didn't see anything when I had the heated bed off but I'll take another look.

Outside that I guess it's off to support.

Posted : 03/03/2020 10:42 pm
rmm200
(@rmm200)
Noble Member
RE: Phantom Y Crashes

Check your zip ties also. One out of position can catch the carriage.

Posted : 03/03/2020 11:26 pm
Dave G
(@dave-g)
Eminent Member
Topic starter answered:
RE: Phantom Y Crashes

Yeah no luck.  Support suggested a motor swap with the X-Axis but I have another machine down waiting for a new heatbreak so I can y-motor swap tonight instead 😀

Posted : 05/03/2020 5:54 pm
jeremyprops
(@jeremyprops)
New Member
RE: Phantom Y Crashes

Hello David, 

...did you ever solve this? Was it the motor? I'm having the issues...beautiful prints in PLA, PETG AND ABS (after some tweaks obviously).

* No tension on the y axis U-bolts

* Pulleys on right and snug

* Belt seems perfect to me (reads 260)

* Nothing is touching or rubbing anywhere

....However I'm trying to print some spare I3 parts and i get 15-25 crashes per print. 

Kinda aggravating but it still prints so nice. 

 

 

Posted : 17/04/2020 3:30 am
Dave G
(@dave-g)
Eminent Member
Topic starter answered:
RE: Phantom Y Crashes

@jeremyprops

Yeah actually I did.  Turns out there was a tiny bit of filament wrapped around the gear, under the belt where you'd never see it.  I guess it was messing with the tension enough or something that clearing it out fixed the issue.

Posted : 17/04/2020 4:00 am
Dave G
(@dave-g)
Eminent Member
Topic starter answered:
RE: Phantom Y Crashes

@jeremyprops

Yeah actually I did.  Turns out there was a tiny bit of filament wrapped around the gear, under the belt where you'd never see it.  I guess it was messing with the tension enough or something that clearing it out fixed the issue.

Posted : 17/04/2020 4:01 am
jeremyprops
(@jeremyprops)
New Member
RE: Phantom Y Crashes

Thanks for the reply !!! Tomorrow I'll tear it down and start again...

Cheers

Posted : 17/04/2020 4:14 am
Share: