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Messages - jchal3

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1
General Mach Discussion / Re: New system set-up help
« on: December 22, 2009, 01:02:48 PM »
TWEAKIE,

I'm hoping to go 4ft. by 4ft.  I know the motors are overkill, but them and the drivers were freebies.

2
General Mach Discussion / Re: New system set-up help
« on: December 22, 2009, 12:02:12 PM »
sterling,

So I have to make sure I get the 8 amps no matter what voltage I use?  With the maximum voltage being 65vdc.

3
General Mach Discussion / Re: New system set-up help
« on: December 22, 2009, 10:43:20 AM »
Hood,

I hadn't actually looked at the specs on it yet.  i just didn't know if I needed that and my drivers, or just that card by itself.  I am having trouble with my current drivers (they are so old they are not supported by the manufacturer, and I can't get any info on them.)  I will probably just buy one of the above drivers, but I will spec out the voltage and current before hand.

4
General Mach Discussion / Re: New system set-up help
« on: December 22, 2009, 10:18:39 AM »
Tweakie,

So if I were to buy this board, I would connect to it with the PC's parallel port. Then from that to the motors.  All of the signal circuits will be internal basically...right?  Do I need a seperate power supply for the board, and one for the motors, or how does that normally work. 

Please keep in mind that my motors are Nema 42's and will be drawing a max of 65dc and 7.9amps per motor.

5
General Mach Discussion / New system set-up help
« on: December 22, 2009, 06:33:34 AM »
Hello,

I am putting together a new mach3 system for a cnc router.  I am confused as to how the stepper driver gets the stepping signals.

First a little background.  The three stepper motors I have are Nema 42 which came off of a piece of packaging machinery.  That machinery was run by an industrial computer.  I have the schematics for the original packing machine.  In the original schematics it shows a +5vdc signal on the step input of the driver, and a -5vdc signal on the direction input of the driver.  This changes throughout the schematic.  I am assuming this is for clockwise and counterclockwise movement. 

I am trying to run these drives through my parallel port on my computer, but I don't understand the positive and negative situation.  I was under the impression that if you wanted to step forward, only the step input got the signal, and if you wanted to step back, the direction and step got a signal. 

My question is, can I run directly from my parallel port to these inputs, or do I need to go through some other sort of board like the one attached below.  I was under the impression that the board in the attached picture would replace my three drives, not be before them in the circuit.

Any help would be appreciated.


6
General Mach Discussion / Re: 3vdc outputs
« on: December 21, 2009, 12:09:36 PM »
Almost forgot.  They are driven with three pacific scientific 5410-010 drivers which i haven't managed to get the connection schematics for yet.

7
General Mach Discussion / Re: 3vdc outputs
« on: December 21, 2009, 12:08:34 PM »
Hood,

They are off of a piece of packaging machinery.  They are Pacific Scientific powerpac motors.  The plate says 65dc @ 7.9amps  300w.  I'm not sure if that is a max or what, but it's going to be hard to get that kind of power in a household environment.  They are Nema 42 with 2 stacks. ( i guess that's how you say it)   I have no idea what the stacks mean.

8
General Mach Discussion / Re: 3vdc outputs
« on: December 21, 2009, 09:14:35 AM »
hood,

They are nema 42 steppers.

9
General Mach Discussion / Re: 3vdc outputs
« on: December 21, 2009, 07:10:48 AM »
fastest,

That is what I meant.  Little mistake.  I am having trouble getting 8amps per motor, but it seems like that is a max, and I could get away with less.  Some poeple are even saying that I should go less to make the motors smoother.  I'm not sure on this stuff.  Anyway I will get it worked out. 

Sorry for the confusion.

10
General Mach Discussion / Re: 3vdc outputs
« on: December 19, 2009, 11:47:27 AM »
haven't had the chance yet.  I have to find the correct power supply for the motors first.  Looks like i'm going to have to buy a power supply.  The motors are 65vdc at 7.9amps each.  I have on other forums trying to figure out how to get to this voltage.  The consensus so far is that they are not going to need that much power, and I can get away with a 24dc with about 6 amps.  Once I get this taken care of I can give the signals a shot.

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