Low torque extruder

[Chownki]

@t3p3tony Yep its skipping steps. looks to me like its not the getting the right amount of current..
I got a bondtech prusa i3 mk3 extruder
STEPPER MOTOR
Lightweight 25 mm pancake stepper with 18 N/m torque.
Max Input Current : 0.8A
Max chamber working temperature : 80℃

[o_lampe]

@chownki You can try 0.8A, but keep an eye on the stepper temperature.
These pancake steppers with geared extruders are sensitive to idler pressure . When you clamp the filament too much, the stepper looses a lot of it's energy to deform the filament.
There is also the chance you have a partially clogged nozzle.

[Chownki]

@o_lampe Have tried upping the amps but no difference - have checked the nozzle and tried replacing, can manuel push the filament through the nozzle with little to no force, when gears are not engaged.
Im sure its not a hardware problem, but some where its not loading the config.g right on start up - when i do M98 pconfig.g all problems are gone

[o_lampe]

@chownki said in Low torque extruder:

; Motor remapping for dual Z and axis Limits
M584 X0 Y1 Z2:4 E3 ; two Z motors connected to driver outputs Z and E1

This motor mapping should come before the other motor settings (microstepping, accel, jerk, etc.)

[T3P3Tony]

@chownki said in Low torque extruder:

but some where its not loading the config.g right on start up - when i do M98 pconfig.g all problems are gone

Before you do the config.g reload does the mtor move at all? I would make the change that @o_lampe mentions.

[engikeneer]

@chownki also, if you send the commands ( e.g. M906) with no parameters via the console in DWC, it will report back what settings are currently applied so you can see what's going on

[Gixxerfast]

@chownki said in Low torque extruder:

M308 S1 P"e0_temp" Y"PT1000" T100000 B4725 R4700 ; Set thermistor + ADC parameters for heater 1 HotEnd

This makes no sense to me. The type is PT1000 and then you have thermistor values.

I guess you don't have a pt1000 and therefore should have Y"thermistor"

Correct?

Here's my config before and after switching to a pt1000:

;M308 S1 P"121.temp0" Y"thermistor" T100000 B4267 ; configure sensor 1 as thermistor on pin 121.temp0
M308 S1 P"121.temp0" Y"pt1000"                   ; configure sensor 1 as pt1000 on pin 121.temp0

[Chownki]

@o_lampe Thats all i needed - Thanks!

[Chownki]

@t3p3tony Yep all other steppers moved fine - did what @o_lampe told and now problem is gone

[Chownki]

@gixxerfast Looks like i had a brain fart! got a pt1000 so just stole your config - old one worked tho

[T3P3Tony]

@chownki thanks for confirming that!