Messages

31

General Mach Discussion / Re: Panasonic servo drive help

« on: May 05, 2013, 01:57:15 PM »

    Maybe it needs something else that was in the Okuma to make it work? Here's what I know about this mpg, it was working in the machine I removed it from but had a small problem. There were two of the detent positions (not in a row) that were dead, machine didn't respond to those "clicks". Set-up people were complaining so I replaced the mpg. The Okuma replacement fixed the "dead spot" problem in the turning center and the old one was destined for the trash so I brought it home for my diy machine,(figured I could live with the two dead spots because the price was right.
    Oh well if I can't use it no biggie but I really like the heavy solid feel of it. What's the scoop on these mach3 pendants with mpg I see all over ebay, any good? Btw I see many are usb, would that work with my set-up without using up input pins on the breakout to PP? And lastly, if I had a usb pendant can you unplug it and still use a usb stick to get programs in the computer then go back to the pendant?

Rick

32

General Mach Discussion / Re: Panasonic servo drive help

« on: May 05, 2013, 10:19:49 AM »

    Well I don't know if I made a meaningful test or not. For starters I used an old computer power supply for testing, the 12v actually checked 10.5 v when connected to the mpg. Check from 0v to A = 0.75v, check from 0v to B =2.95v. Didn't matter if  mpg was sitting still, turned, or how slowly I turned the mpg to try and catch the "high spot" the readings never changed. I even tried a small analog vom to see if it would fluctuate and the results were same as digital vom ? So do these results shed any light on function of the mpg?

Rick   

33

General Mach Discussion / Re: Panasonic servo drive help

« on: May 05, 2013, 12:12:33 AM »

Ok guys,
    I opened up the mpg, only ic I can spot is a NEC C393C. It seems to be classed as a bipolar analog integrated circuit, low power dual comparator. Bout all I know about it is I can repeat what I read on the data sheet, The sheet does say it can operate on a wide input voltage, 2 - 32 volts, also says it can operate on a split power supply +/-1 to +/-16 volts whatever that is?   
    Hood said to check the output to see if it was 12v or not, I'm not sure how to do that. Do I put 12v in then check between A & B while turning the mpg or do I check between 0v and A, and then between 0v and B ?
    Then I was also wondering that seeing how the C393C sheet says it will work on any voltage from 2 to 32 I wonder what else is in the mpg that made them label it as 12v. What I'm trying to say is if 12v in does = 12v out what would happen if I were to put 5v in ?, 5v out maybe ? Kinda seems like the mpg should have been labeled as 2 - 32 volts in if it can work in that range.
   I do know Okuma is big on proprietary stuff in their machines, even though they use parts from outside vendors they have them built special or relabeled just for Okuma so maybe that's why the mpg says 12v, because that's the voltage Okuma uses it at?
    I don't have much in this mpg so I'm willing to experiment just for the education if nothing else. So how do I check the voltage it's putting out?

              Rick

34

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 09:30:26 PM »

    That I don't know either Brett. That's why I thought I better ask before I screw up what I just got working. I've also tried google for info on the BOB and can't find anything.  I've looked at dozens of BOB's and the only place I've seen one like it is the guy I got it from and he's proven to be NO help, take the money and run type.

        Rick

35

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 09:13:11 PM »

OK guys,
    I'm working on that last thing I wanted (for now anyhow). I have a used mpg I got from an old Okuma turning center. It has 4 screw terminals on the back, 2 are labeled source, (12v  0v), the other 2 are "A" & "B". My first question is, 12v is DC voltage, correct? Doesn't say AC or DC just 12v.
    I'm pretty sure I can handle the set up in Mach3, CONFIG>PORTS AND PINS>ENCODER/MPG'S>MPG#1
(enabled) port1,pin10,port1,pin11,counts/unit4,velocity100.00
    I have 12v DC available on the same power supply I'm getting the 24vdc from for the servo drive control circuit so that's no problem as long as the 12v on the mpg is DC. And I know the "A" & "B" go to input 10 & 11 on the BOB, but there are 2 screw terminals at the BOB for each of input 10 &11, How do I know which screw to put "A" & "B" on?
    The encoder is a KURODA  PC-100A-WSTF , I tried google for a data sheet and got nothing. Anyone have suggestions for me?

                                Rick

36

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 07:08:39 PM »

Thank You Brett, for EVERYTHING .   Rick

37

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 06:52:07 PM »

Thanks for being kind to me Hood, it's my first time ya know.                  Rick

38

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 06:44:33 PM »

BTW, those are my "test pins" in the terminal header. Now a couple to show the watchdog on guard in the system. First one is no drive alarms and ready to run. The next one is with a alarm on the Y axis drive, the drive doesn't look alarmed because the display is solid with no alarm and flashes on and off when alarmed, just happened to take pic when it was on so it looks the same as the other two drives.


Ok I'm braced and ready for comments, good or bad.

                                    Rick

39

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 06:33:54 PM »

    Hood recommended I not use the proto board I got because it has one side called a plain and is pretty much all tinned copper. I highly respect his advise but I figured I'd give it a try anyhow since I had it. I inserted the componets from the plain side so I ended up with a board that kinda looks like chrome, shoot, that's gotta be worth at least 10 extra horsepower! Here's a pic taken with flash to highlight the shine.

Another a little less flashy

And now the shot to,  A - make you cringe and laugh,  B - illustrate it don't have to look good to work


               Rick

40

General Mach Discussion / Re: Panasonic servo drive help

« on: May 02, 2013, 05:39:26 PM »

    Ok folks, I'm gonna try to show my Watchdog board here shortly. Thought I should give you electronics and pcb building experts a heads up first.

                          WARNING - SOME VIEWERS MAY FIND THE FOLLOWING IMAGES DISTURBING or FUNNY AS ALL HELL.

    Please keep in mind I'm NOT an electronics or pcb expert, this is the first thing I've ever put together that used any kind of circuit board, I'm sure you'll see that right off. Make sure you don't have anything in your mouth when you view my next post because if you do it may end up coming out your nose and covering your puter screen.

               You've been warned,  Rick