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Probe wiring
« on: May 26, 2011, 02:02:48 AM »
I'm trying to hook up a probe to the probe input on my Ajax running Mach3. I can't get a responce on the LEDs on the diagnostic screen. I'm not sure where to go from here.

Offline Tweakie.CNC

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Re: Probe wiring
« Reply #1 on: May 26, 2011, 05:06:34 AM »
Are you configuring the input pin# you are using to the Probe input in ports and pins and enabling this input ?

Tweakie.
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Re: Probe wiring
« Reply #2 on: May 26, 2011, 12:47:17 PM »
Yes, the I/O map shows my connection as pin 10. In ports and pins, I enabled probe, and set pin to 10.
Is there any way to verify what pin Mach is seeing, besides the LED on the diagnostic screen? Whould the connection show in the XML file?

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Re: Probe wiring
« Reply #3 on: May 26, 2011, 12:55:22 PM »
OK.
Now if you connect pin 10 (probe) to GND the Digitize LED on the Diagnostics page will light. Why would you need any other verification of the operation ?

Tweakie.
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Re: Probe wiring
« Reply #4 on: May 26, 2011, 03:43:42 PM »
Well I did, that's the problem. The LED didn't light up, so I need to know why. I verified the wiring with another program. It showed contact on the right pins. When I go back to Mach, it does not light the LED on the diagnostic screen.

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Re: Probe wiring
« Reply #5 on: May 27, 2011, 01:47:20 AM »
If you have Probe configured active low and configured to pin 10 and enabled then connecting pin 10 to GND (pins 18 - 20 of the parallel port) will light the Digitize LED.

Perhaps you are not connecting pin 10 to GND (the machine spindle or machine frame may not be GND).
Perhaps what is labeled pin 10 on your BoB is not actually pin 10 (check continuity of wiring).
Perhaps pin 10 on your parallel port has died (try another input pin#).

Tweakie.
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Re: Probe wiring
« Reply #6 on: May 28, 2011, 04:23:49 AM »
Thank you for the reply
My Ajax board connects with an ethernet cable, not thru the parallel port. The Ajax board has a plug on the board marked "probe", its connections are at pin 10, +12volt, and Pin 5, -12volt. I ran another software program (CNC11) and the LEDs on its diagnostic screen showed I was connected to the right pins. When I restart Mach 3, the LEDs won't light. I can't check the continuity of the wiring because it uses fiber optics. I'm not sure how to contine.

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Re: Probe wiring
« Reply #7 on: May 28, 2011, 04:53:52 AM »
I think you should contact Ajax directly. They provide all the details of connecting probes and the use of their motion controller with Mach3 so should be able to give you all the information that you need first hand.
(the fiber optics do not form part of the probe connection).

Tweakie.
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Re: Probe wiring
« Reply #8 on: May 28, 2011, 05:06:41 AM »
I have tried to contact Ajax, they do not respond. They have been no help at all.
There installation manual has conflicting data. The I/O mapping numbers change.
The fiber optics do form part of the probe connection, from the MPU11 to the DC310B.
Thank you for the reply
I will keep trying

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Re: Probe wiring
« Reply #9 on: May 28, 2011, 05:38:11 AM »
Sorry, I did not appreciate that Ajax were unresponsive.

Yes you could connect the probe to a DC310B input and thus via fiber optics but, if it were me, I would connect direct to input 481 on the MPU11.

Tweakie.
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