Skip to main content

Issues that may arise when printing and how to address them.

3 Questions View all
Discussion Topic

I am getting error code 121

I have replaced the switch at the top of the loop.

That didnt seem to help, any ideas?

Reply to discussion Subscribe to discussion

Is this a worthwhile discussion?

Score 1
Add a comment

4 Replies

Hey @wpt7308, thanks for reaching out and sorry for the trouble. Error 121 usually means there is a piece of filament stuck somewhere in the path, or the filament is wrapped around the buffer because no more buffer is being made. Could you let us know which of these happened, and if it happens continuously, or for a particular print? Thanks for your patience.

Was this reply helpful?

Score 0
Add a comment

I’ve had this happen more then 10 times in the last two weeks. I keep getting an Error 121 because the filament is wrapped around the buffer (never for a clogged path). It always happens in the beginning of the print. Before this happens, the buffer switch is usually actuated 1 or 2 times during the print and works fine as more filament is advanced. Then the buffer switch will be triggered and no more filament is advanced and the error is triggered. I’m not printing fast and it’s not happening during a color change. What is the solution to fix this? I’m so frustrated and have wasted so much filament. I’ve tried everything. re-slicing, adjusting print speeds, resetting power on everything. Nothing works.

Was this reply helpful?

Score 0
Add a comment

@fijibubba Hey Peter, could you tell me what your SPC/PPM values are, found under “About” on Palette? After you jot these down, could you do a quick reinstall of your current encoder/scroll wheel by following the instructions here (mm3d.co/replaceencoder)? Please remove the wheel, clean it with rubbing alcohol, and place it back. Following this, please recalibrate your SPC/PPM by following the instructions here (mm3d.co/spcppm). Let me know what your new values end up being and if you have any questions about these steps - it should help the buffer issue you are having.

Was this reply helpful?

Score 0

Comments:

Alina,

The video you attached was for encoder replacement. Not scroll wheel replacement. I imagine the single screw holding the metal scroll wheel on will do the trick. The plastic one I assume will remain in place.

So removed the metal scroll wheel, cleaned it with rubbing alcohol and used a Q-tip with rubbing alcohol to clean the grooved area of the black plastic scroll wheel (in place with out removing it). I ran the recalibration and the numbers are as follows:

Old SPC: 2.50

New SPC: 2.49

Old PPM: 40.03

New PPM: 39.60

The numbers seemed very close....

by

@fijibubba Hey Peter, apologies for the confusion - the encoder wheel is the scroll wheel, it's the wheel covered by black rubber. You would have to pop it out of the substructure to fully remove and clean it. Could you try the steps once more with this wheel, and then try to run a print? Let me know if you still get the buffer issue following this. If you could also please share the print project with me, that would be very helpful as well (instructions here: mm3d.co/canvas-sharing).

by

Ok will do.

by

Alina,

I've completed about 10 prints (100+ splices) since removing, and reinstalling the encoder and cleaning the scroll wheel. It seems to be working. Thank you.

by

No problem! I'm happy that helped. Let me know if you run into any other issues.

by

Add a comment

Alina,

It did it again. There are no obstructions in the path. The pictures were taken before I cleared out the palette, after the switch was triggered.

Block Image

Block Image

Was this reply helpful?

Score 0
Add a comment

Join the discussion

Bill Talmage will be eternally grateful.
View Statistics:

Past 24 Hours: 3

Past 7 Days: 5

Past 30 Days: 58

All Time: 70

Send our support team a message

© 2020 Mosaic Manufacturing Ltd.