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Messages - Nworroll

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1
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: April 04, 2011, 08:17:29 AM »
I sent him a message, he said he only had experience with older model bandits.  I also posted in the forum, but no reply.
I did a little more testing.  I found that if I put any positive voltage to H, with ground of that voltage to lo, or to the machine ground, OR any negative voltage to LO with the positive of that voltage to ground, then - The 100 volts going to the motor I measured goes to 0V. 
I am changing a part that maybe defect on the board, I'll let you know what happens after I swapped it.

2
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: April 01, 2011, 11:09:23 AM »
Here are some pictures of the board.




3
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: March 29, 2011, 12:42:42 PM »
So I got the thing powered up.  When I jumper the 'enable' input that was running to the original controller, both green lights on the driver board light up and everything seems ok.  I have 3 power wires running to each motor (100VDC rated).  One wire appears to be ground, and I have 100VDC from each of the other wires to that ground. Does this sound correct?
 
The motors can turn freely when it is powered up.

I tried sending power to the signal inputs but nothing happens.  Maybe I am hooking it up wrong. 
If I wanted to just send a +5 volt signal, I would just have to hook up the +5 to Sig H and the ground to Sig LO?  And this should make the axis move correct?

Nick

4
General Mach Discussion / Re: Encoder wiring on OLD machine.
« on: March 29, 2011, 12:30:22 PM »
Been a while, but I took the cover off the motor, and it is clearly labeled. V +/- A +/-, B +/-, and M +/-.  So I'm all set. 
Thanks!

5
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: January 31, 2011, 12:44:46 PM »
That's a good thought as well!  I'm gonna make up a quick circuit for testing and make sure things work.
Is there any worry about sending to much current to the signal input?

6
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: January 31, 2011, 11:20:05 AM »
Cool.  So if I made a circuit with a adjustable voltage regulator controlled by a potentiometer, a switch for +/- voltage, and a push button and sent that output to the controller, I should be able to have a simple Jog control?  The pot for speed, the switch for direction and the push button for jog.

Anything I am overlooking?

7
General Mach Discussion / Re: DC driver board, terminal abreviations?
« on: January 31, 2011, 10:44:04 AM »
Thanks Nosmo.

The +-10v siganal, is this an analog signal where +/- control the direction and a varying voltage controls the speed (2.5v = 25% speed, 5v = 50% speed, etc)? or is in a 10 V PWM signal input?

Thanks, Nick

8
General Mach Discussion / Re: Encoder wiring on OLD machine.
« on: January 06, 2011, 07:40:26 AM »
It was a few weeks ago that I was poking around, but if I remember correct there was a similar resistance across all wires, not just in pairs.
From what I see an encoder wound have 6 wires, A+, A-, B+, B-, +5V and 0V.

9
General Mach Discussion / Re: Encoder wiring on OLD machine.
« on: January 05, 2011, 06:39:54 PM »
They have 'encoder' printed on the label.  Not all white wires were hooked up to the CNC motherboard.

10
General Mach Discussion / DC driver board, terminal abreviations?
« on: January 05, 2011, 03:20:59 PM »
Converting an old allen bradley bandit 3 controlled mill to Mach 3.
The current 'DC driver board' in the machine has the following input terminals (one set for each axis)

Sig - LO, H, and SH
Tach - H, LO, and SH
Driver - SH, ENA, FLT, and GND

The Tach has connections going to the motors, for feedback I assume.
The Sig has wires going to the LO and H that go into the CNC computer board.
The driver block has nothing connected to it.

This board has wires going to individual boards that are then wired to the motors.

Can someone just give me a quick rundown on what these are.  I am assuming this is a +/- 10V driver board? and can't be used (directly) with mach 3's step/direction signal?

Thanks

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