Hello Guest it is July 12, 2020, 12:07:43 AM

Author Topic: 3vdc outputs  (Read 5750 times)

0 Members and 1 Guest are viewing this topic.

3vdc outputs
« on: December 13, 2009, 09:29:13 PM »
This may be a dumb question, but I was having trouble getting any voltage through my parallel port, so I started reading this forum, and was able to figure that problem out.  The problem now is that my parallel port is putting out 3Vdc as opposed to the 5Vdc that is required by my drivers.  Is this going to be a problem, and if it is does anyone now how to fix it?

Thanks,

Offline RICH

*
  • *
  •  7,411 7,411
    • View Profile
Re: 3vdc outputs
« Reply #1 on: December 13, 2009, 09:58:53 PM »
jchal3,
Some PP cards are dual voltage ( ie; 3 or 5 volts ) and can be set with a jumper. Others are single voltage.
So if it's a tower you can buy a card with the correct voltage. The signal to your drives  ( a square wave goes from a low to a high) and your drives may not accept the lower voltage. Have you tried hooking up a drive and motor to see if it works? 
RICH
Re: 3vdc outputs
« Reply #2 on: December 13, 2009, 10:00:02 PM »
This may be a dumb question, but I was having trouble getting any voltage through my parallel port, so I started reading this forum, and was able to figure that problem out.  The problem now is that my parallel port is putting out 3Vdc as opposed to the 5Vdc that is required by my drivers.  Is this going to be a problem, and if it is does anyone now how to fix it?

Thanks,


Hi,

What you need is a way to convert the 3.3V signals to 5V. The MB-02 breakout board I make and sell can do that for you.

http://homanndesigns.com/store/index.php?main_page=product_info&products_id=59

Cheers,

Peter.
----------------------------------------------------
Homann Designs
http://www.homanndesigns.com
email: peter at homanndesigns.com
Re: 3vdc outputs
« Reply #3 on: December 13, 2009, 10:35:02 PM »
Rich,

I haven't tried it yet with the drives.  So you are saying that there is a chance that there is a jumper on my pp card that will allow me to make it a 5v output?  I will check that out.  But you are also saying that there is achance that the 3v output will be enough.  Am I understanding all of that correctly?

Offline RICH

*
  • *
  •  7,411 7,411
    • View Profile
Re: 3vdc outputs
« Reply #4 on: December 13, 2009, 11:57:05 PM »
Yes, Look and see or get the info on it. I have a laptop that puts out 3.7 volts and works fine with my drives. The board that Peter mentioned may be an easier solution then a new PP card. Not all PP cards are equal ( some don't work, so buy localy with the understanding that if dosen't you get your money back, if not, walk away!)
RICH
Re: 3vdc outputs
« Reply #5 on: December 14, 2009, 06:35:48 AM »
Rich,

Thanks for the help,

I have to get the right power supply to my driver, and then i'm going to give it a shot.

Offline Fastest1

*
  •  927 927
  • Houston, TX
    • View Profile
Re: 3vdc outputs
« Reply #6 on: December 19, 2009, 11:10:58 AM »
Did you ever just plug it in and try it?
I want to die in my sleep like my grandfather, not like the passengers in the car! :-)
Re: 3vdc outputs
« Reply #7 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.

Offline Fastest1

*
  •  927 927
  • Houston, TX
    • View Profile
Re: 3vdc outputs
« Reply #8 on: December 20, 2009, 11:42:37 PM »
I believe the current and not the voltage that is the critical factor, maybe somebody else will chime in.
I want to die in my sleep like my grandfather, not like the passengers in the car! :-)
Re: 3vdc outputs
« Reply #9 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.