Setting up soft limits in UCCNC .. "Logic"

[John11668]

I suppose we all have differences in the way we need to set up . I had not considered this when I originally posted . And it is not surprising that the woodcarvers have different needs to The Heavy metal brigade
Mine is a milling machine of course.

And it had not occurred to me either that having a profiling tool run past zero (obvious once pointed out) could be useful in milling an external profile too, but I suppose that applying an offset overcomes that need.

My next need is to allow for a touch of backlash on my Z motion . Its not much but I would like to figure out how to apply it .
I have ball-screws on X and Y but for my Z axis I am driving the quill through mechanical gears with a 6/1 reduction. As I say it is not a massive amount as there is little wear but If I understand how to cater for it it will assist my next project.

[ngwagwa]

I suppose we all have differences in the way we need to set up . I had not considered this when I originally posted . And it is not surprising that the woodcarvers have different needs to The Heavy metal brigade
Mine is a milling machine of course.

And it had not occurred to me either that having a profiling tool run past zero (obvious once pointed out) could be useful in milling an external profile too, but I suppose that applying an offset overcomes that need.

My next need is to allow for a touch of backlash on my Z motion . Its not much but I would like to figure out how to apply it .
I have ball-screws on X and Y but for my Z axis I am driving the quill through mechanical gears with a 6/1 reduction. As I say it is not a massive amount as there is little wear but If I understand how to cater for it it will assist my next project.

Will backlash be a problem in Z as I would have thought the weight of the spindle would always keep the tool at the lowest position possible thereby eliminating backlash?

[John11668]

Will backlash be a problem in Z as I would have thought the weight of the spindle would always keep the tool at the lowest position possible thereby eliminating backlash?

The quill has a return spring , a bit like a pedestal drill but in an exercise the cutting depth is often increasing so backlash wont be a problem there. But lots of exercises where the quill is being driven up and down frequently so lost motion in each direction in that case . I am presuming if you enter a backlash figure , then a number of steps will be discounted before the Display registers movement. Is that so?