Pitch Error Compensation explanation

Hi Guys,

I went through many post and wiki for Pitch error compensation but i couldn't grasp totally.
an someone please explain me how pitch error compensation works in Linuxcnc.

some links which I went through are linked below:

www.forum.linuxcnc.org/10-advanced-confi...compensation?start=0
forum.linuxcnc.org/38-general-linuxcnc-q...adscrew-compensation
linuxcnc.org/docs/2.6/html/config/ini_co...tml#sub:AXIS-section


 
Regards
Abhishek

comp file is a list of nominal (normal) position and compensated numbers in each direction.

ie (type 0 compensation)

10, 10.1, 10.08

Meaning when you move to position 10 in forward direction, the machine will move to 10.1.
In the reverse direction moving to 10 will actually move to 10.08

You need to leave a little bit of max acceleration head room for the machine to apply compensation.

I've never used it, just interpreting info I have found.

Hi,Thank you for your explanation. However, I'm struggling to understand the compensation behavior in my configuration file. For example, if I specify the following compensations:10  10.1 10.08
20  20.1 20.08
30  30.1 30.08
...

When I move my machine to 30 mm, will the compensations for 10 mm and 20 mm accumulate, causing the machine to move to 30.3 mm instead of 30.1 mm? Or will the machine only apply the 30 mm compensation and move to 30.1 mm?

Regards
Abhishek