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Messages - GPDC

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Show"N"Tell ( Your Machines) / Machine #2
« on: February 21, 2008, 10:39:08 PM »
  This one I get to keep....will add the guarding/chip trap and other goodies next week after return from Knoxville...
It cut the Carve3D leaf bowl beautifully for me...now I'm entering the Solids learning curve....GPDC

  I'm just thinking out loud for a minute here...but you could interface all inputs to Mach using a keyboard emulator (IPAC is a good one) through a PLC, thereby getting any sequence you wanted....hot keys are great....if you do that make SURE youput 10nf disk caps across the ground/input terminals of the IPAC.
                          George P

General Mach Discussion / Knoxville
« on: February 03, 2008, 11:09:58 PM »
  Anyboby from (roughly) central New York going to Knoxville?
 I'm registered, so I'm going & looking for a co-pilot/shotgun rider...
 Mapquest has it @ about 13 hours driving, which I'm planning to do alone (wifey not interested in this trip) at this point,as I really want to go & see stuff...and my air miles need 30 days prior to be useable, so that's out.
 So, if you're interested in being a passenger, or want a passenger, or want a co-pilot or any combination of the above, please get back to me so we can discuss this.

General Mach Discussion / Success!
« on: January 19, 2008, 11:51:23 AM »
  Just now I'm seeing (3) little black motors  all doing just what their supposed to.....MANY THANK TO ALL!...especially HOOD for the help...pics will follow...

General Mach Discussion / Re: Logic Probe
« on: January 15, 2008, 10:39:40 AM »
    What caught my eye quickly inside my PC case was the different voltages as marked on the PSU (AN ATX 350):  +3.3V....+5V...,+12V....-5V....-12V & +5 Vsb....what do you suppose that +3.3V is there for?.....looks like it's got 28A behind it!....that's light welding power!....I just now saw the pulses using the BK i9n time with my keystrokes & that makes for a really happy me!...many thanks for you continued info!....George P.

General Mach Discussion / Re: Logic Probe
« on: January 15, 2008, 08:26:01 AM »
Ah ha!.....thats a great idea, especially in view of the fact I took the side cases off my desktop computer yesterday & completely chickened out on even trying to tap the logic supply voltage.....waaayyyy to much stuff for this kid!
  But I did set a vom to millivolt & lo & behold I got an indication of a pulse train @ the respective ports in time with my key presses.
  Today, just for kicks I'll do exactly what you've suggested, just to see what the probe shows.
  This particular board (the 4AUPC) is waiting for replacement components & so is the new PRO board...missing mosfet, so I'm @ a standstill....yesterday I did the physical stuff for the (3) homing switches, but other than that, the machines' ready to go....it dosen't look as good or have all the operator interface stuff the first machine I put together (for a customer...there are pics of it w/my name attached posted), but then it dosen't need to....I'll be showing it soon....thanks again for your help.
                                    George P.

General Mach Discussion / Re: Logic Probe
« on: January 14, 2008, 08:48:52 AM »
  I thank you for the info.....you've been kind enough to give me direction before...thank you, as for using the probe, it is a DP21 and the instruction sheet is a little vague on what PS it uses...now I know....I was trying to NOT open my computer case!.....fwiw...I did do the VOM test as you suggested & got those results, as you said I would.
                       Thanks, George P.

General Mach Discussion / Re: step & dir pulses
« on: January 13, 2008, 10:54:14 PM »
Ok!....many thanks for that....

General Mach Discussion / Logic Probe
« on: January 13, 2008, 10:49:50 PM »
  This may be a little off topic, if it is , ignore me & I'll go away
Long story short: I've aquired a BK logic probe (with pulse sensing) to help me troubleshoot start up problems with a HobbyCNC 4AUPC R2 board...this probe has black & red power leads, and then the actual probe tip....must I get onto my computers' 5 vdc logic power supply to use this device to "see" the pulse train @ the respective LPT1 pin?....I figure I need this to determine the pulse train to the board is valid, the Dir hi or lo I can see using a VOM between Pin 25 (gnd) & the respective pin I've got set  for that in Mach....two days of silence over @ the hobby forum tells me nobody's got any info for me, but maybe oneof you wizzards amongst the guru's here can give me a little guidence?...I'd sure be appreciative!.....thanks,GPDC

General Mach Discussion / step & dir pulses
« on: January 12, 2008, 12:40:19 AM »
  what time length should I have set for the step & dir pulses to a Hobby 4AUPC R2 board?.....same question for the newer Pro board...anybody?

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