Thank you very much.

My crimped connectors were the reason. All Steppers are working now

Regards
Steffen

Hello,

I have a problem with my Stepper Motors.
After a complete runtime of only around 40 hours 3 of my 5 stepper motors are broken.
The first was the Z Stepper. He only stutters. To confirm that it was the Stepper and not the driver I changed with an other Stepper and the other Stepper works. After a few hours of printing today both Z Steppers are broken. If I will drive in i.E. Z+ the 2 steppers of Z make different directions or drive in the wrong direction and or they stutters. And here the same. If I change both steppers with other steppers then it works perfect. My steppers are all the same models with exact the same specifications. I had not changed any config.

Printer:
Locxess Reptile Extension (https://locxess.de/3D-Drucker-oxid/3D-Drucker-Bausatz-mechanisch-Reptile-Extension-natur-CNC.html)
with 400x400 Bed and ballscrew in Z and Duet3d Wifi

Power Supply:
?China? S-500-24
24V 20A

Stepper Motors:
Nema17
Manufacturer Part Number 17HS19-2004S1
Step Angle 1.8°
Step Accuracy 5%
Holding Torque 59Ncm(83.6oz.in)
Rated Current/phase 2.0A
Phase Resistance 1.4ohms
Voltage 2.8V
Inductance 3.0mH±20%(1KHz)
Weight 400g

Config:

[[language]]
; Drives
M569 P0 S1 ; Drive 0 goes forwards X
M569 P1 S1 ; Drive 1 goes forwards Y
M569 P2 S0 ; Drive 2 goes forwards Z
M569 P3 S1 ; Drive 3 goes forwards
M350 X64 Y64 Z64 E64 I1 ; Configure microstepping with interpolation
M92 X320.825 Y320.592 Z3200 E381.471 ; Set steps per mm
M566 X1200 Y1200 Z15 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z600 E2000 ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z400 E400 ; Set accelerations (mm/s^2)
M906 X1700 Y1700 Z1200 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

So why my steppers are not stay alive long time? Are my config wrong or use I the wrong steppers for my printer? I hope everone can help me with the config or better steppers.

Regards
Steffen