joseph.r12
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Joined: Oct 07, 2017 8:31 pm
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Strange behavior in estep calibration

Jul 24, 2018 11:12 pm

I had a project that didn't work out. I wanted to extrude 100mm of filament to start a re-calibration of the printer. Using pronterface I brought the hot end up to temperature and when I selected extrude it made a grinding/skipping sound and then a bunch of filament came out and then it just dribbled out of the nozzle. OK, I had PET-G loaded and if the filament sensor doesn't like PET-G lets load up some ABS. Same behavior.

I'm running the July firmware, I believe 3.3.1.

Did the same procedure on my other two Monoprice printers (well, calibrate one might as well calibrate them all) and it extruded nicely. And after updating their EPROMs and restarting they were spot on. I even used G code and put the Mk3 in relative mode and told it to extrude 100mm and the behavior was the same as with the Pronterface extrude command.

I've done the extruder calibration on the Mk3 before and it was a success. I was under extruding by 2%. However I recently had a PSU failure. Has anyone else seen the same behavior when running the extrusion calibration, or is this a possible issue with the RAMBo as a result of the PSU failure. Subsequent to the PSU failure I was able to flash the newest firmware. So I'm kind of stumped.

Ideas, thoughts, similar experiences?

Best Answer by joseph.r12 » Jul 26, 2018 9:51 pm
Thanks again!

I tried your workaround and it worked. Appreciate you sharing your workaround.

Joe

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stephan.k
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Re: Strange behavior in estep calibration

Jul 26, 2018 1:15 pm

Just FYI, i have the same problem when trying to extrude 100mm via Pronterface. My workaround is to do it manually in the terminal box and to
send a G1 F100 first..

i.e. this is what I do:

G1 F100
G92 E0
G1 E100 F100

once its done, another G92 E0 to reset the extruder "counter".. Might not be the best way to do it, but this is what worked last nite when i had the same issue

joseph.r12
Posts: 11
Joined: Oct 07, 2017 8:31 pm
Answers: 1
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Re: Strange behavior in estep calibration

Jul 26, 2018 3:38 pm

Thanks! I'll try it when I get home tonight.

joseph.r12
Posts: 11
Joined: Oct 07, 2017 8:31 pm
Answers: 1
Contact: Send private message

Re: Strange behavior in estep calibration

Jul 26, 2018 9:51 pm

Thanks again!

I tried your workaround and it worked. Appreciate you sharing your workaround.

Joe

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