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What drive are you currently using? Do you already have a breakout board?
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I just got off the Yahoo Mach site. They told me there that in order to hook up my limit switches I'd need a bipolar breakout board. Well that needs a separate power supply, so two more gadgets are needed to add one wire to a pin (if I understand the example in the Mach manual). Is there an easier no cost way to do the same thing? This electrical stuff is a PITA for me so I may need a picture of the simple setup.
What drive are you currently using? Do you already have a breakout board?
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
I've got Geko 201's and no breakout board. So, do I need to have one?.
You may be able to wire directly to tha parallel port cable pins, but you may also need to supply 5V and use pullup resistors.
Spending $25 would make it a lot easier. http://www.cnc4pc.com/Parallel_Port_Interface_Card.htm
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Yes, you are right. I have so many issues with the electronic end of cnc as it is. I ordered the breakout and the power supply from cnc4pc. It will be easier.
Ger21, I gor the board and power unit now how do I wire it up. I see that there is a conector for the printer style cable , but only one. On the other side is a block of screw terminals, what happens here? And, can I wire in a fan to keep things cool in the 12vdc block?
Page 2 of the manual shows a gecko and limit wired up, along with the 5V. That should get you started.
Typically you wire the limits in series, all to one pin, and wire the home's seperately, each on their own pin. Wire the Geckos to 2,3 for one axis, 4,5 for the next, 6,7 for the third.
You can use pins 10,11,12,13,and 15 for the switches.
Last edited by ger21; 12-26-2005 at 12:35 PM.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
I was able to wire some inexpensive optical switches ( http://catalog.sensing.honeywell.com...=HOA1887%2D012 ) directly to the pins with 10K pullup resistors and a seperate 5v power supply. The only issue I came across was that it occasionally had problems sinking enough current to draw the pin low, increasing the pullup value (up to 1M) had some, but minimal effect.
Would the bipolar board do a better job? Is there a way to more effectively sink the current?
This was mocked up on a breadboard with only one active pin, is it possible that I will see better results when more power (other pins) are connected to the DB25 drawing more power of the computer's bus?
Thanks
Randy
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