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Messages - metal-n-more

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1
General Mach Discussion / Re: need mach motor tuning explained better
« on: March 05, 2009, 10:07:04 PM »
Hi Jim I am running 3 ea Gecko 203V "Vampire Drives"
2 ea G-STEP-II Dual Gecko Stepper Interface Cards
I have a 16 tooth gear and a 16 pitch rack  one rev on the gear appears to move 3.0"
I'm sorry if I sound ??? I just am not understanding the issue sometimes things need time to sink in. I understand the number is not negotiable. I have set up to mills and a lathe with a flashcut system and they are just fine. The rack is kicking me
so when you say 16 tooth and 16 pitch one rev should be 1" that is not the case.
In the mach manual it talks about diametrical pitch
I hope you have enough to help.
Thanks John

2
General Mach Discussion / need mach motor tuning explained better
« on: March 05, 2009, 12:58:46 AM »
Hi I built a 4x4 router with dual x rack system and thought I had it tuned correctly. I did some engraving of signs and they turned out perfect.  I went to drill some holes, 9 inches apart and I gained about .375 after two holes. Tryed tuning with indicators for long distance and came out better but now if you check .500 moves they are off by .010. What am I doing wrong. What I set up was a 16 pitch rack. A 16 teeth 1.0 pitch diameter gears. The gear ratio on the steppers is 4.8 to 1
I could use some help on this matter.
Thanks John

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