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Messages - halkintool

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11
General Mach Discussion / Torch height control.
« on: February 09, 2009, 11:04:29 AM »
After a week or so of running my plasma table, i've realized a torch height control is going to be a necessity. Getting actual motion is no problem, however im wondering what would be ideal to control the motion. The plugin page lists a THC system from candcnc.com. But it looks like it only works with their BOB system. Im running the dsp Motion Controller, so that should make a difference with what i can run. Also the basis for my height control is a voltage feedback value from the plasma unit. Something like 50-300VDC. Which can easily be scaled for a 0-10V analog signal etc.

Does anyone know of any other solutions, is anyone else running a plasma with any other THC system?

Quote
Full Digital Torch Height Control Expansion Module

HUH?  What's this?  Because the DTHC is now a tiny plug-in module you can make ANY UBOB based product into a full blown Digital Torch Height Control.  Comes with a matching THC Sensor Card for interface to your Plasma cutter.
NOTE:  YOU CANNOT HAVE A ISS-O2 SPINDLE SPEED AND DTHC-Expansion Module plugged in at the same time.

Doesnt sound like it would work with my dsp motion contoller...

12
General Mach Discussion / Re: question about analog input servo drives
« on: February 04, 2009, 03:07:45 PM »
Im using analog input servo drives on my setup, i used the dsp motion controller. Extremely simple to interface and gives you additional I/O. You could probably fudge something together if you're just building a machine for the sport of it. If you're looking for reliabilty and cost effectiveness in the build, just order something known to work.

13
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 04, 2009, 03:03:16 PM »
The I/O is all controlled by Mach3.  so if we allow access to PPort, it will just go to Mach3, not the DSPMC.  Only the I/O mapped to the DSPMC will go over ethernet.

the only problem I see right now is that the pport input scanning will be slow so you wont be able to use the inputs for a fast mpg.  regular on/off will be ok.


thanks
Rufi





No necessarily true.

If you input an MPG signal through the PP, it will go straight to the Mach3 software and translate into motion which is then communicated as a software command to the dsp. Same as if you had an e-stop input etc, the estop would communicate through the mach3 to the dspMC. As far as speed, i would assume it would work just as fast as it does on the screen which seems quick enough.

14
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 04, 2009, 02:02:04 PM »
Running another DB25 cable an entire 30ft to the cabinet is overkill when the controls I want to install are less than 6" from the motherboard of the computer. Also, if you are running an MPG, you're running low voltage signals all the way along a table with all kinds of crazy voltage going on with a bunch of other cables vs. the MPG going right into the CPU and communicating with the motion control via the ethernet. The ethernet cable is proven to be reliable for motion and no matter what you do all motion is feed to the control via the computer in real time anyways, so i cant see how it would hurt the e-stop on the monitor has proven reliable and fast so anything coming through the PP should be just as good.  In my scenario, running a new DB25, opening up all the cable trays, rewrapping all the cables etc punching another hole in the cabinet etc is a lot more work than just making a custom DB25 cable to run to a few elements mounted to the face of my control head. Im also not adding any new external cables and its a lot cleaner as far as a resellable product.

15
General Mach Discussion / Re: Stepper Motor Problem/Issue
« on: February 04, 2009, 01:54:19 PM »
If the motor has a gear reduction inside you could have stripped the teeth off one of the gears. What kinda motor are you using?

16
General Mach Discussion / Hotkey for "step mode" when jogging?
« on: February 04, 2009, 01:52:54 PM »
Every once in a while, i must slip and hit the wrong key when im doing something and the machine goes into step mode instead of velocity for jogging and the machine creeps along at like 2ipm trying to jog 1,10,100 inches etc.
When I hit tab and open the MPG window, i can see that "step" is lit up but when i toggle modes around, i cant get that to shut off unless i restart the program.

How do I shut off step mode while the control is running without restarting?

17
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 04, 2009, 10:16:32 AM »
That would be the general idea, i would mount one on the inside of my control head for lights, buttons and interface devices.

Those boards arent specific to the dspMC, you can use them with any DB25 cable.

18
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 02, 2009, 03:59:28 PM »
I the I/O on the dspMC is fine for most operations, as far as human interface devices, with a control head type CNC control, it would make wiring easier to have the PPort running the MPG, buttons on the control panel etc. Othewise we're running wires all the way back to the cabinet, which is fine for a 1 off, but we're currently looking at making a couple tables etc so if we did build more it would be advantageous to be able to hook up to the control right at the control head vs going all the way back to the cabinet for everything. Would probably be a good feature for the dsp to have.

19
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 02, 2009, 12:47:26 PM »
Why couldnt it?

20
dspMC/IP Motion Controller / Re: Using dspMC and PPort together?
« on: February 02, 2009, 10:05:17 AM »
Is it possible to modify the plug in to access PPort?

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