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Topics - obhitn3

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Made some serious headway tuning the motors last night. NOW the direction is possessed and none of the 3 ways in the MACH3 Manual seem to fix it. While tuning, the UP ARROW Key should make the motors turn + and the DOWN ARROW Key should move the Motors -.

This is the case only 50% of the time. It is unreliable at best

A sample would be like below:

UP ARROW - Moves the motor +

DOWN ARROW - Moves the Motor -

UP ARROW - Moves the Motor +

DOWN ARROW - CONTINUES TO MOVE THE MOTOR +

They sometimes move in the direction they should, however after 3-4 movements in the correct direction, the motors WILL ALWAYS move in the WRONG direction when the opposite ARROW is prressed.

Any ideas?

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General Mach Discussion / Motor Tuning with Gecko 201 and 202 Drives
« on: March 12, 2009, 02:07:50 PM »
Guys - Please forgive me as I know NOTHING about this stuff. i am simply a Computer Geek trying to help a friend set up his CNC machine.

He has 3 Gecko Drives hooked up to REX motors. He is using MACH3 SW

We are trying to tune the motors and the whole Steps per unit are beyond me.

He has a 21 Motor Pulley, a 42 other pulley, 8 thread pitch and X, Y & Z Axes.

The documentation elaborates more on the Z but I dont have it on me.

We are trying to tune and the motors seem to work well sometimes, then grab and shake, then work. using the up and down arrows dont change direction all the time. I am totally lost.

Can someone tell me what my Steps per unit should be and what Acc and Velocity i should be setting this up for? Any help would be appreciated

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