Topics created by morf33

@morf33 your config looks ok, but for Y you must verify M92 X100.00 Y100.00 Z400.00 E409.00
Maybe the steps/mm is different, verify the count of your teeth, it may be different.

16 teeth: 200 steps per rotation * 16 microteps / 32 mm per rotation = 100.
20 teeth: 200 steps per rotation * 16 microteps / 40 mm per rotation = would be 80.
Seems you have 20 teeth at the Y stepper and with the M92 you get more distance than planned. (16=>20 is 1/4 more, 20/4 mm is 5 mm more, this would match).

I would also change M557. You should take into account the probe offset and start M557 with x40 and Y50. I would use more points for mesh compensation (S value lower or use the P parameter), but it depends on how flat your bed is, i.e. how important mesh compensation is for you.

@morf33 said in mesh bed leveling issue:

M92 X100.00 Y100.00 Z400.00 E409.00 ; set steps per mm

You'd have to do the calculation knowing your belt tooth pitch and pulley tooth count as well as stepper resolution and microstepping, but I think your correct steps for X and Y is actually 80.

xy_steps_per_mm = (motor_steps_per_rev ∗ driver_microstep) / (belt_pitch ∗ pulley_number_of_teeth)

all is good now , thank you all for the assistance

@morf33 said in mgn an8 config issues .:

M92 X80.00 Y80.00 Z4000.00 E420.00 ; set steps per mm

I think your Z steps per mm are wrong, so the motors are trying to turn too fast. From this thread https://forum.duet3d.com/topic/15206/anet-a8-tuning-issues it should be Z400, not Z4000. So change the above line to:

M92 X80.00 Y80.00 Z400.00 E420.00 ; set steps per mm

Looking at your other settings, they seem to be the defaults. I'd guess that your M92 line should actually be:

M92 X100.00 Y100.00 Z400.00 E100.00 ; set steps per mm

Have a look at this thread, has example config: https://forum.duet3d.com/topic/5843/anet-a8-stepper-motor-question
A forum search for 'Anet A8' https://forum.duet3d.com/search/?term=anet a8&in=titlesposts brings up a number of other threads that may be useful too.

Ian

@morf33 Please ask them to exchange under warranty. You can direct them to this thread as authorization.