The problem I'm having is peaks and valleys in the bed map. It's actually worse than it's was before. https://forum.seemecnc.com/forum/viewtopic.php?f=37&t=12768 sadly all the pictures have timed out. Here is my bed map now. Manual says tight enough they don't slip, I'm passed that to get this good of results.

One other concern is how tight the CF arms are on the metal balls. I might swap the plastic ones back in to see if that is adding to much of a bind.

I kinda hate to call this backlash because it's not that simple, it's related to the last direction moved. Here is a macro I have to test for it a each tower. If someone doesn't mind run this and post the results. This is a duet with a smart effector.

Code: Select all

```
;test at each tower for backlash
G28
;X tower Y tower x-69.2 y-40 to x-95.2 y-55 then x-121.2 y-70 to x-95.2 y-55
g1 x-69.2 y-40 z10 f6000
g30 p0 x-92.5 y-55. z-99999
g1 x-69.2 y-40 f6000
g30 p1 x-92.5 y-55. z-99999
g1 x-69.2 y-40 f6000
g30 p2 x-92.5 y-55. z-99999
g1 x-69.2 y-40 f6000
g30 p3 x-92.5 y-55. z-99999 S-1
g1 x-121.2 y-70. z10 f6000
g30 p0 x-92.5 y-55. z-99999
g1 x-121.2 y-70. f6000
g30 p1 x-92.5 y-55. z-99999
g1 x-121.2 y-70. f6000
g30 p2 x-92.5 y-55. z-99999
g1 x-121.2 y-70. f6000
g30 p3 x-92.5 y-55. z-99999 S-1
;Y tower x69.2 y-40 to x95.2 y-55 then x121.2 y-70 to x95.2 y-55
g1 x69.2 y-40 z10 f6000
g30 p0 x92.5 y-55. z-99999
g1 x69.2 y-40 f6000
g30 p1 x92.5 y-55. z-99999
g1 x69.2 y-40 f6000
g30 p2 x92.5 y-55. z-99999
g1 x69.2 y-40 f6000
g30 p3 x92.5 y-55. z-99999 S-1
g1 x121.2 y-70. z10 f6000
g30 p0 x92.5 y-55. z-99999
g1 x121.2 y-70. f6000
g30 p1 x92.5 y-55. z-99999
g1 x121.2 y-70. f6000
g30 p2 x92.5 y-55. z-99999
g1 x121.2 y-70. f6000
g30 p3 x92.5 y-55. z-99999 S-1
;Z tower 80 to 110 and then 140 to 110
g1 x0 y80. z10 f6000
g30 p0 x0 y110. z-99999
g1 x0 y80. f6000
g30 p1 x0 y110. z-99999
g1 x0 y80. f6000
g30 p2 x0 y110. z-99999
g1 x0 y80. f6000
g30 p3 x0 y110. z-99999 S-1
g1 x0 y140. z10 f6000
g30 p0 x0 y110. z-99999
g1 x0 y140. f6000
g30 p1 x0 y110. z-99999
g1 x0 y140. f6000
g30 p2 x0 y110. z-99999
g1 x0 y140. f6000
g30 p3 x0 y110. z-99999 S-1
```

Code: Select all

```
5/8/2020, 7:49:11 PM: M98 P"0:/macros/xyzTowerBacklash": G32 bed probe heights: 0.054 0.074 0.089 0.089, mean 0.077, deviation from mean 0.014
5/8/2020, 7:49:20 PM: : G32 bed probe heights: -0.191 -0.186 -0.191 -0.191, mean -0.189, deviation from mean 0.002
5/8/2020, 7:49:31 PM: : G32 bed probe heights: 0.076 0.091 0.096 0.116, mean 0.094, deviation from mean 0.014
5/8/2020, 7:49:40 PM: : G32 bed probe heights: -0.204 -0.224 -0.229 -0.249, mean -0.227, deviation from mean 0.016
5/8/2020, 7:49:51 PM: : G32 bed probe heights: 0.037 0.052 0.057 0.052, mean 0.049, deviation from mean 0.008
5/8/2020, 7:50:01 PM: : G32 bed probe heights: -0.283 -0.283 -0.308 -0.308, mean -0.296, deviation from mean 0.012
```

Cory

Boring details. This was a v2 with a duet. It's now a V3 frame, ac heated bed, .9deg steppers, metal ball joint, CF arms, smart effector, maker713 effector mount, 24V power supply.