Topics

1

General Mach Discussion / Zero plate problem

« on: June 29, 2008, 06:59:29 PM »

I am trying to add a touch plate using the XYZ probe modification from the CNC Zone forum.
The problem I am having is Mach always sees the digitize input as always active (status light on) even if I unplug the parallel cable.
I do have the probe input pin set to active low.
I have Mach on a computer in my office and with the same settings the digitize input is not active (status light off).
Have the same version on both computers and have also tried different versions and reinstalling.
If I change the input to active high the light just stays out and the touch plate still does not work.

 Any ideas?

 Thanks
 George

2

General Mach Discussion / Not ignoring tool change

« on: January 12, 2008, 08:20:41 PM »

After upgrading to version 3.00 when I get to this line N40t1m06 Mach waits for me to press cycle start again before continuing.  I have ignore tool change selected in configuration.  This is the same file that I ran in the previous version without this problem.  Any ideas what is causing this?

Thanks
George

3

General Mach Discussion / CV feedrate question

« on: August 21, 2007, 06:48:06 PM »

On the settings screen what is the CV feedrate for and how do you determine what the setting should be.  Also how do you determine the CV distance tolerance?  My axis are set with a velocity of 600" min., 35 acceleration and I will most likely be cutting at 300"-400"  min.

Thanks

4

General Mach Discussion / Help with acceleration and speed settings

« on: July 31, 2007, 11:04:26 PM »

I am just finishing the rebuild of my cnc router.  It started out with small Nema 23 steppers and very light gantry.  The only thing I kept was the very solidly built table.  It now is much heavier and powered with Nema 34 1289 oz/in steppers.
I now need to know the best and safest way to figure out my maximum acceleration and speeds for all the axis as well as a good starting point. If anyone could help it would be greatly appreciated.
Here is some information:
The x gantry including y carriage and z weighs 295 lbs. and is moved with 2- 1289 oz/in steppers.
The y carriage including the z weighs 95 lbs. and is moved with 1- 1289 oz/in stepper.
The Z weighs 69 lbs. and is moved with 1- 1289 oz/in stepper.

Everything is rack and pinion using 20 tooth pinions and 20 pitch rack no gear reduction.
Using Gecko 201 drives.

Thanks