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Author Topic: Probe wiring  (Read 13278 times)

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Re: Probe wiring
« Reply #10 on: May 28, 2011, 05:06:35 PM »
That is where I am connected. The probe input on the MPU11.  H3 Pin 6, Mechanical Probe input, and H3 Pin 5, Probe Return.
When I run the CNC11 program to check the pin connection, it says that H3 Pin 6 is input 769, not 481 as it should be.
The MPU11 I/O map doesn't have an input 481. It starts at 769 and goes to 786.

Offline Tweakie.CNC

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Re: Probe wiring
« Reply #11 on: May 29, 2011, 02:12:39 AM »
Can you post (or email me) the probing script you are using within Mach.

Tweakie.
KEEP SAFE !

Offline BR549

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Re: Probe wiring
« Reply #12 on: May 29, 2011, 11:28:56 AM »
From Looking at the Docs I don't think that the probe input is brought back to MACH. It looks as thought it is handled internaly. It states that it only writes the probed values to the DROS and not the internal variables. It also does not use the saved files but relies on YOU to write the values to a file.

I would use the HIGH SPEED port if I were setting it up. IF not when probing at higher speeds you could overrun the trip point and crash the probe. Even at 4000 reads per sec that was slow compared to the LPT which reads at kernal speed.

So I don't think you will SEE the inputs from mach  ?????

Just a thought(;-) TP
« Last Edit: May 29, 2011, 11:32:48 AM by BR549 »

Offline Tweakie.CNC

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Re: Probe wiring
« Reply #13 on: May 29, 2011, 12:22:26 PM »
I think you are right Terry, even the guys on the Ajax forum don't really seem to know the answer to this one. This is why I would like to see the probing routine to find out how it interprets and applies the DRO 1999.

Tweakie.
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Re: Probe wiring
« Reply #14 on: May 30, 2011, 01:05:47 PM »
Can you post (or email me) the probing script you are using within Mach.
Tweakie.

Yes, but I don't know what a probing script is. Tell me how to find it, and I'll get it to you.
Re: Probe wiring
« Reply #15 on: May 30, 2011, 01:11:21 PM »

So I don't think you will SEE the inputs from mach  ?????

Just a thought(;-) TP

But the proper wire connections, should light the probe LED on the Mach diagnostic screen.

Offline BR549

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Re: Probe wiring
« Reply #16 on: May 30, 2011, 05:03:49 PM »
NOT if they did not bring that signal back throught the plugin. If it is done through the motion card then it really does not need to bring the SIGNAL back to mach. It just needs to provide the info.


Hook it up so that you see the signal on the Ajax side. Then run a G31 probe command and see if it returns the probed positional data.

Just a thought, (;-) TP
Re: Probe wiring
« Reply #17 on: May 31, 2011, 04:02:14 AM »
I don't know how to do that, it doesn't work.

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Re: Probe wiring
« Reply #18 on: May 31, 2011, 04:21:22 AM »
The problem you have at the moment is that the Digitize LED is defined on the Mach Screen as OemLED 825 and the Ajax instructions say that it writes the 'point of contact' to DRO1999. As it stands this will not illuminate any LED's on the Mach screen.
Somewhere there is an Ajax probing script (or routine for using a probe) which translates this DRO1999 into something that Mach recognises as the point of contact.

Tweakie.
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Offline BR549

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Re: Probe wiring
« Reply #19 on: May 31, 2011, 09:55:57 AM »
From the MDI type G31 x-2 F10 . the machine shuld start moving in the X- direction then trip the probe with your finger to see if it stops.

(;-) TP