HT20S2 X Axis Accuracy problem

[j_luv]

Hello everyone.

I do have a ht20s2 with yasnax lx3bt controller.
The accuracy of the machine x-axis is at +-0.02 mm which is very Bad for most of the parts i do.

I already checked the encode, switched the Motors from Z and X Axis. Also switched only the encoder.
I also checked the backslash which seems to be good.

Another problem in connection to the accuracy is when changing the X-axis tool wear. Lets say my diameter is 20.01mm and i want 20.00mm i am doing a tool length change for the X-axis of 0.01mm. But the part just stays the same or it just jumps to a different value like 19.98 or 20.03.

I also checked the turret positioning accuracy which is fine.

The only thing i am thinking of are the x-axis linear rails. Can the play in the rails be adjusted?

Maybe someone can help me out. I am from Germany by the way.

Thanks for the help.

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[bcarlson42]

Just a shot in the dark but I had a problem with my KV turret machine that had symptoms like this when the tools weren't being clamped fully. The clamp/unclamp hydraulic cylinder became stuck and wouldn't travel all the way back. This caused the tool holders to not clamp fully. I made a whole run of parts (with threads!) like this and couldn't figure out why they were so inconsistent. It took a lot of force to see the holder move.

Rebuilding the cylinder was the fix.

In terms of linear rails, pretty sure they are a throw-away item. The Hitachi parts manual lists them from the actual manufacturer so you don't need to rely on a dead company (IIRC).

Good luck