Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Sterob on November 07, 2018, 06:26:04 AM
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Hi Guys,
I have been using a Z Probe since buying my machine with no problems. I have since bought a Digitizing Probe to learn how to use it and see if it is going to be a useful tool.
In Mach 3 under Config>Ports and Pins>Inputs , I only see one input that seems to relate to Probing.
As I am using a different input for my Digitizing Probe, I had to change the setting I had in Mach 3 for my Z Probe. I don't want to disturb that setting each time I want to use the DP. ( I am trialing the 'Probe It' software. )
Am I able to set up and use BOTH probes without having to change settings in Mach 3?
Steve
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I've posted a Brain that "links" a second input to the probe input. It's on the forum somewhere. But I think it only works with the parallel port, and not with motion controllers.
I think that's the only way to do it in Mach3.
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Hi,
you can have up to four active probe circuits in Mach4.
Craig
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I've posted a Brain that "links" a second input to the probe input. It's on the forum somewhere. But I think it only works with the parallel port, and not with motion controllers.
I think that's the only way to do it in Mach3.
Thanks Ger21....I'll have a play and see how it goes.
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Thanks Craig,
I didn't really want to know that....lol.
Maybe its time to move to Mach 4....
Steve
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use a relay to select the probe.
wire the relay to an Output, and you can select the probe within your probe macro.
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use a relay to select the probe.
wire the relay to an Output, and you can select the probe within your probe macro.
Thats not a bad idea...thanks.
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I use an output pin to a couple of gates to select which probe I want to use (under Mach3). But that is custom.
Cheers
Roger
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I use an output pin to a couple of gates to select which probe I want to use (under Mach3). But that is custom.
Cheers
Roger
Thanks Roger.
I've had a bit of a play ..... I can use the same input but one probe requires a HI signal and the other a LO, so as it stands now, I still have to change the configuration in Mach 3 each time I change probes.
Instead of a gate or a relay , I was thinking of using a changeover switch, but I still have the other problem to overcome yet.
Steve
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never saw a documentation about how to Change Input Parameters via VBScript,
maybe someone else know about a possibility.
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Have a look at machstandmill site
In the manual it’s explained as well as a circuit to do what you want
If I remember you use the timer input for the second probe
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I use an output pin to a couple of gates to select which probe I want to use (under Mach3). But that is custom.
Cheers
Roger
Thanks Roger.
I've had a bit of a play ..... I can use the same input but one probe requires a HI signal and the other a LO, so as it stands now, I still have to change the configuration in Mach 3 each time I change probes.
Instead of a gate or a relay , I was thinking of using a changeover switch, but I still have the other problem to overcome yet.
Steve
ok then you have to put an other locic/relay in front of the selctor Switch or selector relay,
to get the two probes onto the same switching Level (hi or low what ever you want)
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I've had a bit of a play ..... I can use the same input but one probe requires a HI signal and the other a LO, so as it stands now, I still have to change the configuration in Mach 3 each time I change probes.
There are two different situations here. The first is where you have touch probes with different outputs but only want to use one at a time. The other is where you actually do have two different probes running in parallel - and yes, such situations do exist with value. If I could figure out how to attach an image to this post I would include a circuit diagram for the two cases.
Oh well, in words then. I don't run the touch probe straight into the Mach3 pins. I use a pull-up (or pull-down, as the case may be) resistor, then a couple of 74HC14 buffer gates, with a switch to select polarity. Some RC noise filtering is included with the gates, and then it is all fed through an opto-isolator into the Mach3 pin. The filtering AND the opto serve as very good blocks against noise.
Cheers
Roger
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If I could figure out how to attach an image to this post I would include a circuit diagram for the two cases.
if you use the reply button, you should get the Additional Option possibilty, where you can attach files.
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Ah yes - my fault.
See attached (I think).
Cheers
Roger
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I'd just use a Brain like I suggested earlier.