Hey,
thank you so much for your guide. I followed and upgraded my printer with the Sherpa. I have some questions about it.
Is it right that the Klipper ignore my start gcode from prusa slicer (purge line)?
What do you change after swap to the Sherpa extruder in your slicer? Retraction? Something else?
Kind regards
Benni
You need to share your start G-Code so we can have a look.
After upgrading to the Sherpa, I updated retraction. But you need to fine tune your profile again, if you want the best results.
My startcode:
;STARTGCODE
M117 Initializing
M83 ; extruder relative mode
M107
G28 ;Home
M900 K0.05
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M104 S[first_layer_temperature] ; set extruder temp
M109 S[first_layer_temperature] ; wait for extruder temp
G92 E0
G1 X-98 Y0 Z0.2 F4000 ; move to arc start
G3 X0 Y-98 I98 Z0.2 E40 F400 ; lay arc stripe 90deg
G0 Z1
G92 E0.0
Yeah my first testprint doesnt looks good 
there must be a lot of fine tuning.
I did this this weekend and it looks pretty bad. did you ever get a answer or figure out what you needed to tweek?
Please share some pictures/results so we can check.
Have you performed the extruder and flow rate calibration after the upgrade?
seems like a seam issue. calibrated the 200m feed to be exact. the steps for my setup are 743 with 500ma for the motor. retraction is .04 @ 30mms. thats whats recommended by Sherpa and no stringing issues. duno what to mess with
I believe it’s a problem with too high retraction and/or badly calibrated pressure advance.
I would suggest calibrating the extruder, flow rate, then pressure advance