Messages

1

General Mach Discussion / Not so flat Engraver bed

« on: June 19, 2009, 04:54:46 AM »

Is it possible to add or subtract a correction factor to the z axis zero to accommodate an engraver with a curved bed? E.g. a look up table for various x,y positions with linear interpolation between points.

2

General Mach Discussion / Re: Stepper motors loosing postion.

« on: September 25, 2008, 01:40:21 PM »

Wow, grateful for the response, but unfortunately yesterday my employer insisted I go a fix a machine in Finland, so I can’t try things out until next week.  As for the drives I need to take the lid of  the box and check - i cant remember. Thanks for the suggestions to date.

3

General Mach Discussion / Re: Stepper motors loosing postion.

« on: September 24, 2008, 03:59:56 AM »

Changed the z and x motors  for 2 new higher torque motors, still loosing posn.

4

General Mach Discussion / Re: Stepper motors loosing postion.

« on: September 23, 2008, 04:42:12 PM »

Thanks, Tried that took it upto 5, both step and direction!

5

General Mach Discussion / Stepper motors loosing postion.

« on: September 23, 2008, 03:11:34 PM »

Looking for Help

I bought a 10year old engraving machine, which I converter to run under Mack 3.
A continuing problem is that the Z axis is losing its position after cutting 30 letters, ends up being 0.5mm higher or so. The x and y are also loosing a position but not by so much.
I’ve changed the stepper motion on the z and x with the next up in the range to give more torque but this has had no effect!  If tried slowing the motor accel and vel down with no improvement.
Does anybody have suggestion as to what is wrong?
Another option would be to use the Z solenoid, this lifts the router by 1mm or so (part of the old system).  The solenoid is wired in and controllable from mach3, How could I automate this control i.e lift the router between letters.

Any suggestion would be much appreciated.