Messages

1

General Mach Discussion / Re: Mach and Closed Loop DRO Operation

« on: May 18, 2015, 08:07:21 PM »

Yes, the fault signal will become part of both a hardware stand alone E-stop and the logic-E-stop before the machine is put into operation. Currently it's in a test configuration while the mechanical issues are identified and corrected.

2

General Mach Discussion / Re: Mach and Closed Loop DRO Operation

« on: May 18, 2015, 07:39:33 PM »

I'm using a CNC Drive DG4S-16035 - DC Servo Drive which has differential inputs for my 2 phase quadrature encoder. The DG4S expects step and direction inputs from MACH and uses the encoder to close the loop between the motor to the servo drive.

However, there is no encoder information available beyond the servo drive units. 

It's interesting and slightly troubling to turn off the dc power to the servo motors, watch the mill completely stop, yet Mach continues running G Code and updating the DRO displays like all is good.

3

General Mach Discussion / Mach and Closed Loop DRO Operation

« on: May 18, 2015, 02:44:21 PM »

Does either Mach3 or Mach4 have the ability to monitor the output of servo or stepper shaft encoders in order to better assure axis positional accuracy and motion control?

If not, is it correct that the Mach DRO displays operate on the basis of Mach commands rather than rely on feedback directly from the machine being controlled?

4

General Mach Discussion / Re: Chinese Digital Caliper As Encoder?

« on: February 17, 2010, 03:37:51 PM »

Thanks.

How does Mach handle backlash compensation, and where can I find detail information about this aspect of Mach?

5

General Mach Discussion / Chinese Digital Caliper As Encoder?

« on: February 17, 2010, 02:05:21 PM »

Just wondering if Mach can use either the direct or modified output from the inexpensive Chinese digital calipers in a closed loop manner to help resolve backlash and other positioning errors??

It's my understanding that the Chinese calipers don't output the same quad signals that are standard on most encoders.