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3 Parallel Port cards??
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Topic: 3 Parallel Port cards?? (Read 4930 times)
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Zero Cool
86
3 Parallel Port cards??
«
on:
April 10, 2011, 11:05:07 AM »
Is there a limit as to how many parallel port cards can be used with Mach3??
I am currently running 2 in the machine I am building. the first card is pretty much used up controlling the TB6550 controller board. it seems to require Step, Dir & enable pins for all 3 axis plus spindle control and there are no pins left.
I added a second card to control some Solid state relays for Vacuum and flood pump and I am using the rest of the pins for manual direction control.
But I would like to add a 3rd card so I can utilize the P.I.D function for spindle speed control. I just don't have anymore available inputs on the 2 existing cards.
So I'm curious if I can run 3 cards with Mach3. assuming I can get 3 cards to run in the PC in the first place.
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Hood
25,856
Carnoustie, Scotland
Re: 3 Parallel Port cards??
«
Reply #1 on:
April 10, 2011, 11:43:32 AM »
Two parallel ports is the max as far as I am aware.
Hood
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Zero Cool
86
Re: 3 Parallel Port cards??
«
Reply #2 on:
April 10, 2011, 11:59:58 AM »
that's a bummer with only 10 input pins. I need one more! or i need to re-think how to do the jog buttons.
I currently have:
X Limit
Y Limit
Z Limit
E stop
Jog X+
Jog X-
Jog Y+
Jog Y-
Jog Z+
Jog Z-
and that wipes out all 10 pins. I need a way to get a speed pulse into Mach3 any suggestions??
I suppose I could disassemble a USB keyboard, remove the keyboard PCB and wire the arrow keys to the direction buttons on the panel. that would free up 6 input pins. but i really don't want to do that if i don't have to.
Plus I would like to be able to add a digitizer at some point and that will require yet more pins....hmmm
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angel tech
499
Re: 3 Parallel Port cards??
«
Reply #3 on:
April 10, 2011, 12:52:35 PM »
you could wire the x, y, and z limit switches in series and run them into one input, which will give you two inputs free.
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Zero Cool
86
Re: 3 Parallel Port cards??
«
Reply #4 on:
April 10, 2011, 12:54:26 PM »
I was wondering if i could do that or if there was a reason it needed all 3?? sweet well there are the 2 pins i need then!
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Hood
25,856
Carnoustie, Scotland
Re: 3 Parallel Port cards??
«
Reply #5 on:
April 10, 2011, 01:58:31 PM »
Other thing to look at is something like the PoKeys, it will give you approx 55 I/O if I remember right. Time critical things such as home switches and step/dir will need to be on the port but things like external switches the Pokeys will handle very well.
Hood
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ger21
6,291
Re: 3 Parallel Port cards??
«
Reply #6 on:
April 11, 2011, 08:27:31 AM »
You can probably use a jumper to enable your drives, and not have to use the paralel port, which free up 3 pins. Are you using a breakout board that allows pins 2-9 as inputs on the second port? That may help.
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Gerry
2010 Screenset
http://www.thecncwoodworker.com/2010.html
JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Zero Cool
86
Re: 3 Parallel Port cards??
«
Reply #7 on:
April 11, 2011, 07:05:26 PM »
I have 2x 25 pin breakout boards in my custom motor controller box. I have access to all 25 pins on the BOB, there is a cable that connects from the BOB to the circuit board. so yes I have access to all pins. So can i jumper the enable lines to +5v? or should I jumper the three axis together to one PC port enable pin?
I am using a HY-TB4DV-M Toshiba TB6560 motor controller board commonly found on eBay.
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Tweakie.CNC
8,021
Super Kitty
Re: 3 Parallel Port cards??
«
Reply #8 on:
April 12, 2011, 07:33:57 AM »
If its any help I have taken all enable lines through toggle switches (mounted on the controller case) to +5 volts and this allows an axis to be disconnected if required for any purpose.
Tweakie.
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Success consists of going from failure to failure without loss of enthusiasm. Winston Churchill.
Zero Cool
86
Re: 3 Parallel Port cards??
«
Reply #9 on:
April 12, 2011, 07:39:34 AM »
sweet. ok I am reworking how I am going to do this then. Thanks!
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