CW back lash compensation

[Piranha]

Hi Guys, Big Respect to PacManFan for the CW soft and this beautiful forums and info
I am building my first DLP now and faced some backlash issue in my balls crew, it is not so huge - something like 0.08 but anyway it would be great if in the next versions of brilliant CW software it would be possible to make this backlash compensation (like MACH3 has)
or maybe it is already there but I can not find?

[Scatterplot]

I don't have a great solution, but if you always approach your target from the same direction you shouldn't have much issue with backlash, since it will always be taken up in the same direction.

[Piranha]

But we go up and down every single layer and resin has some viscosity (some counter force) so it matters

[jwlrymkr]

Good ball screws typically have little to zero backlash. Lead screws have some backlash, but that is usually compensated by the anti-backlash nut. If very little force is applied to a lead screw that has a properly tensioned anti backlash nut, there should be no backlash.

[Piranha]

yes sure good ball screws have zero to little, mine has 0.08mm, actually a lot of people use different screws so it would be great to have backlash compensation option in the MOST POPULAR 3DSLA software in the World Thats what Im talking about

[rkundla]

If the amount is constant, couldn't you compensate for it during the peel section of the gcode when adjusting for the up and down z-axis movement?

[PacManFan]

From what I understand, backlash is only an issue when changing direction. If the Z axis moves up by 5 and down by 4.9, there may be some backlash when the axis first moves up, but it will be corrected during the downward movement, ensuring each layer will be consistently 100 microns.