Prusa upgraded to duet, weird extrusion

Phaedrux

@Murloc992 said in Prusa upgraded to duet, weird extrusion:

M566 X600.00 Y600.00 Z12.00 E150.00 ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z360.00 E7200.00 ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z200.00 E10000.00 ; set accelerations (mm/s^2)

Yes your Z and E axis settings are very conservative. this will make for slow retractions and layer changes / zhops.

The low XY jerk and acceleration don't seem to match up with the large amount of ringing you are seeing. Are your belts a little loose?

Here's what I use on my i3

M566 X800 Y800 Z60 E3000 P1				; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z900 E6000				; Set maximum speeds (mm/min)
M201 X6000 Y6000 Z200 E5000				; Set accelerations (mm/s^2)
M204 P600 T3000						; Set accelerations (mm/s^2) for print and travel moves

JamesM

The pauses you speak of are most likely due to the jerk setting you have for your z-axis and extruder. If you are using pressure advance I would change the extruder instantaneous speed change (jerk) to something around 2000 and the Z somewhere in the 150-300 range.

Murloc992

@Phaedrux said in Prusa upgraded to duet, weird extrusion:

@Murloc992 said in Prusa upgraded to duet, weird extrusion:

M566 X600.00 Y600.00 Z12.00 E150.00 ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z360.00 E7200.00 ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z200.00 E10000.00 ; set accelerations (mm/s^2)

Yes your Z and E axis settings are very conservative. this will make for slow retractions and layer changes / zhops.

The low XY jerk and acceleration don't seem to match up with the large amount of ringing you are seeing. Are your belts a little loose?

Here's what I use on my i3
M566 X800 Y800 Z60 E3000 P1				; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z900 E6000				; Set maximum speeds (mm/min)
M201 X6000 Y6000 Z200 E5000				; Set accelerations (mm/s^2)
M204 P600 T3000						; Set accelerations (mm/s^2) for print and travel moves

I will try your settings. My belts are not loose, just the right tension, printer moves more smoothly and silently with these motors I put on. Hopefully it's just a setting issue.

I will take a video of it printing in the evening.

No other variables except for the motors have changed.

Murloc992

@Phaedrux

So I used your settings, prints look identical, just that it printed WAY faster. Weird..

I just noticed that my X idler might be bigger than Y one.. I will investigate shortly..

Murloc992

Nope, seems identical. I am out of what I can do. Every axis seems to move extremely smoothly and fast. The frame is as rigid as it gets..

T3P3Tony

@Murloc992 if you are still seeing the weird pulsing with @Phaedrux 's config then it might be worth swapping that motor with one of the other ones you bought to confirm that the problem is not with the motor.

Another bit of elimination is to try using E1 for the extruder to rule out some weird failure mode of the driver (highly unlikely but you never know). You can use M584 to switch between E0 and E1

Murloc992

@T3P3Tony I already tried switching the motor, same pulsing. I haven't tried switching the driver yet, but I use dual Z, can I set Z as E0?

T3P3Tony

@Murloc992 yes remap as you like. Also another option for this test you can connect two Z in series to the Z motor connector

Murloc992

@T3P3Tony I am printing another single wall cube and notice something new with new acceleration/jerk settings. I will post soon. I still hear the pulsing though, but it looks a bit different than before.