Ah, thanks. I didn't assemble it, it was a ready-to-print purchase.

I've been trying unsuccessfully to calibrate an EZRstuder on a new Artemis (seemecnc) printer. I've measured out 60mm PLA filament,
Using the web interface, I tried to extrude 50mm at 30mm/sec and 205c and the extruder seemed to studder, extruding only about 1/3 of the requested amount.
I tried: 200c, 195c, same results.
I tried: all temps at 15mm/sec, same results.

Finally, I measured out 50mm of filament, marking it every 10 mm.
I then tried: 50mm at 5mm/sec. Here's what happened:
The machine seemed to operate correctly for the first 30mm of filament, then between 30-40mm the extruder reversed itself, going: reverse/forward/reverse/forward until it stopped completely having printed out approximately 38mm filament.

Does anyone have any idea what is causing the reversing behavior?

Electronics: DuetWifi 1.0
My firmware version is: 1.19.2
Web server version: 1.19
Web interface version: 1.19

thanks,

-sandy

Here's a new issue I haven't seen here, or with other firmware before.

Midway through a long print, sliced with Kisslicer (Pro) - the print halts and the extruder starts spinning very fast retracting the filament for 10 min and then ends the print. This has happened twice at the same layer (layer:57) in the code.

Just as a test, to see if the problem was the file, I edited the gcode, removed the layers up to 57 and restarted the print from that point and new weird behavior happens.
The printer starts by spurting out a lot of filament and then clogs the hot-end.

Understand, I've used this method many times with my rambo/repeier to fix prints that stopped in the middle, and this behavior has never happened. With the other firmware, the printer just starts printing at the height/XY positions and correct amount of filament.
More importantly, there is nothing in the code at LAYER:57 that is any different than layers 1-56. There's no fault or error message, nothing.

Does relative vs. exact extrusion play a role in the repair problem? It might explain the odd extrusion behavior when starting from E202+, but the default for repetier is absolute extrusion also and this weird stuff never happened.

Moreover, It doesn't explain why it stopped and starts retracting really, really fast for a long time.

For reference, here's the start of the file after editing:

G21
M107
T0
M104 S200
M190 S60
M109 S200
G28
G90
G92 E0
M82
G0 F18000 X16.726 Y-11.512 Z14.8
G0 ZZ17.096 Y-11.273
;TYPE:WALL-INNER
G1 F2400 X17.697 Y-12.178 E202.49996
G1 X18.337 Y-13.041 E202.59898

Here's the start of the file before editing:

G21
M107
T0
M104 S200
M190 S60
M109 S200
G28
G90
G92 E0
M82
G0 F18000 X37.246 Y-36.087 Z0.3
G1 Z0.3
G1 F6666 E0

And here's the part between the last working and the failed layers:

G1 F2400 X-35.2 Y-19.882 E9850.43843
G1 F2400 X-31.68 Y-20.745 E9850.49042
; LAYER:57
G0 F18000 X40.862 Y21.314 Z14.3
G0 X40.74 Y20.889
; TYPE:WALL-INNER
G1 F2400 X39.666 Y21.157 E9850.54145

So, it turns out one of the problems is that the onyx bed is way too shiny. I started from scratch - and redid the effector tilt corrections in the dark (the light of my laptop, and the paper test by feel)
most of the differences were much closer.
with two at -0.68 and two at -0.38 and the rest quite close.

Running auto calibration in the dark after 3 attempts my deviation was 0.072 - that's the first time I've been under .2

I'd still like it to be closer, though.

@kragar I know that my z-tower belt is tighter than x and y, but I haven't been able to get them the same. How does one fix this?

@jnofsinger: I'm using the recommended 6. I'll try the S8 - maybe I should check out the geckotek bed, too.

The best I can get is a deviation of 0.232
How is it people are getting such good calibration using the mini-IR? I've followed all the instructions, my delta is level (tricklaser max metal build)
my bed.g file is from Escher3d's bed wizard
and I used dc42's instructions to adjust the H value in my bed.g to make up for any effector tilt.

My mini IR measurements from Z0 at each test point are consistently repeatable.

No matter what I do, or where I start from I never get better than 0.232. Running auto calibration 6 times in a row gives me: Deviation before 0.232 after 0.232

I can't get my bed flat at all.

Okay, think I've fixed it. I removed the SDcard, wiped my /sys dir and copied the /sys_dc42Kossel to /sys

Now all the commands work again, though it's not configured for my printer.
I think there must be something wrong with my config.g file, so I'm going to reconfigure the config.g by hand instead of re-copying it.

Yes, I did, more than once.

Now I can't connect to it all except if I connect by USB to pronterface, stop/start the wifi and then connect to wifi - but the minute I try to edit the config.g or upload a new one, it disconnects and then I cannot connect again by wifi until I reboot and go through the pronterface procedure again.

FYI: Pronterface reads 'Macro file homeall.g not found.'

I'll try pressing the reset button again and see what happens.

I think I've managed to reset it to 1.17c using the sam-ba method - I won't have time to reconfigure and test until later this week.

Really strange problem. I upgraded to 1.17d and now I can't home the printer. I get 'homeall.g not found' errors.
But, I have a delta, and I can see (and open and edit) the homedelta.g file through the duet-wifi interface.

I reverted to 1.17.c and rebooted several times but the problem still exists.