Centroid Community CNC Support Forum

Muzzler,

You are right - I double checked all the mechanics and found that my belt tension was not adequate. After fixing that my backlash was FAR less!

I have updated my original posting with a new version of the code. The original one that I posted had some errors

I also added a function in ...

qjones,

I am using a cheap Chinese one that I found on amazon

Model number: jcs900-2ae

It seems to work well enough

Alan,

Thanks for the input.. I have been working off the TB048 pdf - did not notice the newer one!

That makes it much easier! Also looks like they made it super easy to do the pitch adjustment.. no more math!

I'll follow those steps tomorrow and hopefully will have it all calibrated and ready to ...

Tom,

Thats what I was hoping - thanks for the confirmation.

I am going to re-do all my axis tomorrow with the backlash set at zero

cnckeith,

I will post some pictures after work tomorrow

It is a 1986 Leadwell MCV-550E which used to have a Meldas system in it

I replaced everything with acorn and dyn4 servos

Quick question - when doing the "laser" screw compensation - is there still a requirement to enter backlash ...

Muzzer,

I included my Z axis .tab file in the zip file there - it shows the correction values for the whole length and back. Open it in notepad

I have a 30+ year old machine that I have upgraded. The ballscrews on Z have over 7 thou of backlash yet I was able to dial it in very close by mapping it ...

Hey all,

Just wanted to share a method that I came up with to dial in my screw compensation as accurately as possible without having to sit there writing down a bunch of figures..

Using a cheap DRO from amazon, I set it up on each of my axis to be measured

I then hooked up the DRO to an ardunio ...