Z-Offset Not Consistent

[tmitch205]

RRF 3.4 + 6HC + 1LC + BLtouch + 4 Independent Z Lead Screws
The machine is a 600mm³ - Heated Bed
Z motors are 1.8°. Leadscrews are T8x8 4 Start. Using 8X micro-stepping. Steps @ 200. current set to 950.

My Z-Offset is not consistent. I have had to alter it at least eight times in the last two days. It will be fine for the next print I start after changing it. But the next print will be between .15 to .35mm off in either direction (too high or too low). I have seven other printers, and none have ever had this issue.

To set it:

1. I send G28.
2. I send G32.
3. I send M561.
4. I send the print head to the center of the bed.
5. I lower the nozzle onto the receipt paper just to the point that I can't move the paper.
6. I send G92 Z0
7. I raise the nozzle 10mm
8. I send G30 S-1
9. The number reported back is what I entered in config.g

Start script I use in my slicer is:
M107 ;start with the fan off
G32 ;
G29 S1 ;
G1 Z5 F3000 ;
G92 E0 ; reset extrusion distance

There are no offsets within my slicer.

I am at a loss. I am beginning to think it may be mechanical, possibly defective backlash nuts... I don't know.

What thoughts do any of you have to share?

[tmitch205]

@tmitch205 Disregard this one. I went diving into code for the prints. It's the slicer causing it. As an example, in the most recent one, for some reason, my layer height is set to .20, but the code has the skirt/brim at .32.