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Author Topic: Mach3 Turn X axis problems  (Read 125 times)

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Mach3 Turn X axis problems
« on: January 01, 2021, 05:13:37 AM »
Happy New Year.
I have a home brewed slant bed late running with Mach3 Turn ver 066
Have an 8 tool ATC with tools set in the tool table according to the Mach3 Turn manual. Works perfect.
Running a program generated from Fusion 360 with post-prosesser Generic Mach3 Turning, first run works perfect.
Has removed G28 home but end program with G30.
Second run Z axis is ok but X axis in minus.

After running the program in air when completed
1st run Machine coordinates X-30.5, Z 0
1st run Program coordinates X+10,5 Z-22.57

2nd run MC X 0, Z 0
2nd run PC +71.53, Z-22,57

The same happen when running second run on a program generated from the Mach3 Turn wizard.

First run always perfect but second run always become a disaster.

I have checked end rechecked all setting but there are something wrong.

I have calculated the X to require 3,4 Nm with a SF of 1.5, which is direct driven by a tema 34 stepper motor with holding torque of 4,4 Nm. The X axis seems to work well, but it’s where the problem is.

Any suggestions?

Re: Mach3 Turn X axis problems
« Reply #1 on: January 01, 2021, 08:39:36 AM »
Found the problem. I needed to home the machine. Now it´s fine.
Homing seems to work fine, but when When I use G28 than it triggers the limit switches and I need to reset. Instead of G28 I end the program with G53 X-5  Z-5. + M30. Then it stop before it trigger the limit switches.
How should I go about using G28 whit out trigger the limit switch? Home and limit are combined.
Re: Mach3 Turn X axis problems
« Reply #2 on: January 02, 2021, 07:24:35 PM »
G53 Will use machine direct machine cor system and ignores all else and keeps you off the switches
Your limit switch for plus direction  must be faulty and if you can not  get one maybe physically switch around with the minus switch to you can ------------Faulty switches is the biggest cause of machine crashes i have seen until the introduction of absolute encoders that dont use them