Help on setup on xylotex and mach3

[nurp]

Setup help on mill
I have finally setup my Taig mill that I have owned for quite a while. The problem that I am having is the Y-axis is loosing steps in the Y negative direction mostly. On occasion it also loses step in the X-axis also. I have an Xlyotex 3 axis kit with steppers, specs-23H 276-28-4B, 2.8A Phase 1.9NM. The Z-axis runs fine. The Vref voltages are set at 3.5 volts to each axis. I have adjusted the gibs in Y-axis. I even ran it once with them loosen off and had the same result. The axis looses steps mainly when doing contour milling in x and y, as when doing a radius. The feed on the program that I am running in Mach 3 2.0 Demo version is at 5.0 IPM. When I jog the table at 20.0 IPM it seems to do just fine. I used the file from the Xlyotex forum that is recommend for the setting of Mach 3.
Also my leads from the Xlyotex board are not shielded and they a 4 ft. long. Would having these leads unshielded cable cause this skipping?
I also have adjusted y-axis half nut on the lead screw as suggested at Carter’s site. I still have the problem of loosing steps. Any guidance would be appreciated on settings in Mach 3 or on the machine.

[3d GEORGE]

I had problems with my Taig in the X axis awhile ago. Pulled my hair out trying to figure the problem. In the middle of a cut, X would misposition, reset the DRO and continue cutting at a new position. Spent a few hours on the phone with Taig, they couldn't figure it. Even tried a new printer board for the parallel port. As a last resort, I changed out the printer port cable from CPU to stepper control box. That fixed it, a lousy eight dollar cable. Try it, might be your problem. Good luck!

[ger21]

You might want to read this.
http://www.cnczone.com/forums/showth...639#post256639

[TOTALLYRC]

Originally Posted by nurp Setup help on mill I have finally setup my Taig mill that I have owned for quite a while. The problem that I am having is the Y-axis is loosing steps in the Y negative direction mostly. On occasion it also loses step in the X-axis also. I have an Xlyotex 3 axis kit with steppers, specs-23H 276-28-4B, 2.8A Phase 1.9NM. The Z-axis runs fine. The Vref voltages are set at 3.5 volts to each axis. I have adjusted the gibs in Y-axis. I even ran it once with them loosen off and had the same result. The axis looses steps mainly when doing contour milling in x and y, as when doing a radius. The feed on the program that I am running in Mach 3 2.0 Demo version is at 5.0 IPM. When I jog the table at 20.0 IPM it seems to do just fine. I used the file from the Xlyotex forum that is recommend for the setting of Mach 3. Also my leads from the Xlyotex board are not shielded and they a 4 ft. long. Would having these leads unshielded cable cause this skipping? I also have adjusted y-axis half nut on the lead screw as suggested at Carter’s site. I still have the problem of loosing steps. Any guidance would be appreciated on settings in Mach 3 or on the machine.

On the atig with the stock 20tpi leadscrew and the 425oz steppers the best I was ever able to do repeatable was a max speed of 10ipm This was cutting or jogging. A dampner as Ger21 suggested will most certainly help.
I happened to have some single stack motors and was able to set my max at 20 ipm. It would jog at 35 plus but it would loose steps unpredictably.

A newer driver with midband compensation would be able to run the machine way faster but since you have the Xylotex try the dampners if you can make them.

Mike