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Forum: 70. Control Systems Thu 05 June 2008, 05:05
Replies: 40
Views: 46,295
Posted By Richards
The PMDX might be driving other critical things...

The PMDX might be driving other critical things that need to stay on even if the steppers are suddenly stopped. For instance, if a vacuum clamping system were controlled by the PMDX and the...
Forum: 70. Control Systems Thu 05 June 2008, 02:13
Replies: 40
Views: 46,295
Posted By Richards
Mark, I agree with Steve. On a technical...

Mark,
I agree with Steve. On a technical level, it's better to have the E-stop switch(es) cut the pulse train that goes from the breakout board to the Gecko stepper drivers rather than just killing...
Forum: 70. Control Systems Wed 04 June 2008, 15:59
Replies: 40
Views: 46,295
Posted By Richards
I use a "wall-wart" power supply that is...

I use a "wall-wart" power supply that is connected through the main switch to A.C. so that whenever, the main power supply is on, the auxiliary power supply is on also. (If I had a little more...
Forum: 70. Control Systems Wed 04 June 2008, 13:16
Replies: 40
Views: 46,295
Posted By Richards
I've never been too successful using USB as a...

I've never been too successful using USB as a power source. It greatly depends on your USB. The computers that I'm using on the test bench are 2-3 years old, so they aren't the latest and greatest...
Forum: 70. Control Systems Wed 04 June 2008, 06:35
Replies: 40
Views: 46,295
Posted By Richards
Mark, How are you providing power to the...

Mark,

How are you providing power to the PMDX-122? I use a 12VDC power supply, others use a low voltage AC power supply.
Forum: 70. Control Systems Mon 02 June 2008, 08:11
Replies: 40
Views: 46,295
Posted By Richards
Following posts moved from another thread: ...

Following posts moved from another thread:

Be sure to jumper the PMDX-122 correctly for the G203v. You MUST connect terminal #10 on the G203v (Common) to Ground on the PMDX-122. The PMDX-122...
Forum: 70. Control Systems Tue 08 January 2008, 05:29
Replies: 40
Views: 46,295
Posted By Richards
The 74ALS245 devices, such as those found on the...

The 74ALS245 devices, such as those found on the PMDX-122, can sink about 24mA and source about 15mA. The Gecko G203v draws about 2.5mA, so the PMDX-122 should have no problem driving two G203v...
Forum: 70. Control Systems Mon 07 January 2008, 05:01
Replies: 40
Views: 46,295
Posted By Richards
Be very careful about connecting two motors to...

Be very careful about connecting two motors to one stepper driver. The coils on a large stepper motor (as compared to the little motors found in a floppy drive head assembly) are not perfectly...
Forum: 70. Control Systems Sat 05 January 2008, 23:51
Replies: 40
Views: 46,295
Posted By Richards
J.R., I'm not familiar with the CNC4PC C10...

J.R.,
I'm not familiar with the CNC4PC C10 Board. I've downloaded the manual, but it doesn't have all of the information that I need. I'm assuming that the pin numbers in the manual directly...
Forum: 70. Control Systems Sat 05 January 2008, 14:23
Replies: 40
Views: 46,295
Posted By Richards
J.R., The PMDX-122 is designed to directly...

J.R.,

The PMDX-122 is designed to directly connect to four stepper drivers. You can add a second parallel port to your computer and then daisy chain a second PMDX-122 if you need to control more...
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