I just replaced a stepper motor on my Tevo Little Monster and ran through calibration. After the calibration I printed an "X" 200mm x 200mm. I had to add M579 to scale down the x direction and now x and y are both 200mm, but the print is skewed such that the angle between two legs of the "X" is over 90 agrees and the angle between the adjacent two legs is slightly under 90 degrees.
Anyone have any suggestions?
@phaedrux Thank you. I replaced the power supply with one I had from a HE3D kit. It is probably low quality too. If it blows up, I will get something better.
@jens55 Not offensive. That is reality.... you get what you pay for.
I am configuring a Duet2 wifi on a Tevo Little Monster. I finished the Z calibration then ran PID tuning for the nozzle. At around 190C the power supply blew a couple of mosfets. The fuse on the power supply did not blow and the fuse on the Duet2 board did not blow. The board survived the event. Is there any diagnostic information saved on the board? I do not want to blow another power supply. Any other thoughts??
I have a production model that I print over and over again. Every once in a while the print comes out oblong, unequal in x and y. If I could figure out what I am doing wrong it would be extremely helpful and save me money. This is a trace of the base of two prints, one is correct and the other is oblong. These two prints were made back to back on the same machine. 
Hardware is a Tevo Little Monster with BLTouch. I heat the bed and run delta calibration before every print.config.g bed.g
@Phaedrux said in Delta x and y not equal after firmare upgrade 2.05.1 to 3.1.1:
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Thank you @Phaedrux, that change fixed issue with homedelta.g. I was just about to report the bug in the configuration tool but that has also been fixed. Nice work. The support for this board has been excellent.
I added the line G1 Z-15 F6000 back in to homedelta.g and now G28 errors out with "Error: G0/G1: target position not reachable from current position". This is why it was commented out. After it throws this error every relative move command from the dashboard throws the same error.
The heat break backed out by a half a turn. I was able to tighten it up and now the z-offset is positive 0.45. Trying a test print now.
More information that I hope will help me nail down these issues.
I had added G92 X0 Y0 Z520 after homing because it seemed like I was issuing this command after homing every time. It seems like I do still have some issue with my config. I had one successful print start (failed on a filament jam) then the next one goofed up, so I am still in the process of trouble shooting.
; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v3.1.8 on Tue Nov 24 2020 20:28:41 GMT-0500 (Eastern Standard Time)
G91 ; relative positioning
G1 H1 X705 Y705 Z705 F3600 ; move all towers to the high end stopping at the endstops (first pass)
G1 H2 X-5 Y-5 Z-5 F1800 ; go down a few mm
G1 H1 X10 Y10 Z10 F360 ; move all towers up once more (second pass)
;G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred
G90 ; absolute positioning
;G92 X0 Y0 Z520 ; Set x, y and z
;G1 X0 Y0 F6000 ; move X+Y to the centre