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General Mach Discussion / Auto tuning slaved axis with Delta Servo Drives
« on: May 21, 2013, 03:51:39 PM »
Hi Guys!
And the battle to tame this CNC goes on…. I have got the tool change working well but now that I am doing real cutting I have noticed the movement was far from ok.
Any sharp changes in direction cause overrun, poorly cut parts and wasted material. Moves around non arc curves (splines made up of lots of short lines) cause shuddering of the gantry. I also can not get smooth movement from a g1 to g2/g3 without a slight pause as if it has turned of cv mode. A true circile would pause on each line of code. The only solution has been to reduce my feeds right down.
I have tried every cv distance/angle setting with slight improvement but not enough so assuming my servo drives may be the issue. I have worked out how to auto tune the Y and Z axis and seeing better results but as I have two servos on the X axis (A is slaved to the X inside Mach3) and unsure how to auto tune both at the same time.
I found a few posts that suggested setting BOTH drives up from a “virtual master” and using a 1:1 gearing but could not work out for the life of me how to do that with my drives.
Could some of the masters cast a few pointers my way as I would love to get my router running smoothly!
THANKS!
And the battle to tame this CNC goes on…. I have got the tool change working well but now that I am doing real cutting I have noticed the movement was far from ok.
Any sharp changes in direction cause overrun, poorly cut parts and wasted material. Moves around non arc curves (splines made up of lots of short lines) cause shuddering of the gantry. I also can not get smooth movement from a g1 to g2/g3 without a slight pause as if it has turned of cv mode. A true circile would pause on each line of code. The only solution has been to reduce my feeds right down.
I have tried every cv distance/angle setting with slight improvement but not enough so assuming my servo drives may be the issue. I have worked out how to auto tune the Y and Z axis and seeing better results but as I have two servos on the X axis (A is slaved to the X inside Mach3) and unsure how to auto tune both at the same time.
I found a few posts that suggested setting BOTH drives up from a “virtual master” and using a 1:1 gearing but could not work out for the life of me how to do that with my drives.
Could some of the masters cast a few pointers my way as I would love to get my router running smoothly!
THANKS!