- G540 z touch plate stopped working
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Member
G540 z touch plate stopped working
I have my cnc machine running on a g540. Connected to input 4 is my touch plate which connects with a single wire to an aluminum block.
I have had no issues with the setup until today, all of a sudden Mach 3 will not sense the touching of the router bit to the block.
I have checked the wire and it is fine, If I measure the voltage between the block and the router bit, it measures 11.5v. All other input pins work properly with the proximity sensors.
I have changed out the g540 with a spare unit and that did not seem to change anything either.
I am looking for some input on this situation? Could I have accidentally hit something in Mach3?
Thank you for any help.
BenG
Kansas City
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Member
Re: G540 z touch plate stopped working
11.5V between the block and the router bit looks correct
As you have substituted the G540 with a spare
I would check / replace the printer cable connecting the G540 to the PC printer port / motion controller
( are you using a PC printer port or motion controller ? )
If that makes no difference
check the mach3 setup has not been corrupted – start with pins and ports -
some times mach 3 needs re-installing
John
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Re: G540 z touch plate stopped working
It was late last night when I posted, so here is a response to John along with a little bit more information:
I do have a motion controller between the pc and the g540. It is a uc300eth-5lpt. The parallel port between the motion controller and the g540 was originally connected to the port 2, as a diagnostic, I move it to port 3, this did not change anything. (I do not have a spare uc300).
I changed the mach3 config file to an older config file, and that did not work either.
I have a licensed copy of uccnc installed on my machine and using that did not change anything.
One thing I am going to try this morning is to move the touch plate wire over to input 1 and see if that might work.
Also, I do not have a spare parallel port pigtail on hand, so I will pick up one and see if that might have developed an issue.
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Member
Re: G540 z touch plate stopped working
I tried moving the touch plate wire to input 1 and this did not change anything.
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Re: G540 z touch plate stopped working
John, Thanks for your input.
After further reading I decided to move the ground wire to the ground plane used for the g540. Originally I had a single wire from the g540 input 4 to the z probe plate and using the routers ground to close the circuit. Now, I have two wires, one from the ground plane and the other frome the g540 to the probe. And now an alligator clip to connect to the router bit.
Working perfectly again.
Thanks!
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Member
Re: G540 z touch plate stopped working
a good result !
glad to see its working again
John
- G540 z touch plate stopped working
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