Z-zero plate - for calibrating z-height to workpiece or table

[Gerald D]

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[kaartman]

Hi Nils,
The motor is turning free from the Z axis, when i configure the probe input then the Z motor is not turning at all, with input #4 the motor is turning nicely but did not stop with the touch plate touching to ground, I have installed the Zero probe system from ART`s recommendation and it worked first time with no problems, would like to have the remote pushbutton activated on that system too,
Thank you for your contribution, much appreciated,

[obuhus]

Originally Posted by Gerald D

Marc, typically there are two wires, one with a crocodile clip, other with an alu plate. Clip goes to cutting bit to ground it properly, plate carries 5V. When bit touches plate it drops (shorts) the plate voltage to 0v. PMDX senses it as an input.

Some people work happily without the ground wire and clip because the cutter grounds electrically via the router bearings. Folk with spindles and ceramic bearings discovered that this does not ground and the spindle just keeps driving on into the table, lifting the y-car. (Imagine if the y-car could not lift . . . )

Then there are coated bits TiN or diamond/ceramic which also do not conduct . . . .

Greetings to all. Greetings Gerald. To see glad again you. At me a question about Z-Zero. I wish to understand as correctly to connect a wire from a crocodile to PMDX, from alu plate to PMDX where the black button is connected and how it is all works? I read this forum, but the full answer to the question have not found: (

More low I show, how I plan to connect other buttons on Y and Z-gantry. I hope all correctly except joints in a grey square?

[sailfl]

Dmitriy,

If you are using a router, you don't have to use the ground wire because it is grounded as described above.

You know just have to tell Mach which pin you are using for the probe and it should work.

[obuhus]

Thanks for a prompt reply. But I wish to understand in the complete set as I should connect wires from Z-zero plate, from Gerald's black button and what script to use.
I project a board of the relay and I should know as correctly all to make. The preliminary project of a board of the relay more low.

[Gerald D]

Hi Dmitriy, I have not used that black button yet. Sorry.

[obuhus]

What for the note?

[obuhus]

It is good thing - to use the additional (black) button for activation Match at calibration Z-zero. I heard it can work as additional limit switch? Let's solve this problem together!

[smreish]

What's the black button for?

I have modified Greolt and Nils script for the z-zero height to use this button as a height "set" and "start z-zero" routine. Before anyone ask's - I can't find the script in my library and the MM it is being used on is not near me....so I can't send it to you all yet.

Logic used:

1) Quick momentary push of the black operator "set's the z-height" at the current location.
2) A 2 second hold of the black operator "start's the z-zero" routine.

This allows for the single use of the PMDX input for both.

My contribution today!

[obuhus]

I thought that Gerald's black button activates a script for Match. After that Match defines height Z-zero with use of a script and inputs PMDX (a crocodile and z-plate), then makes program changes to options.

[obuhus]

How you think? Whether we can use the Crocodile and Z-zero plate as additional limit swittch for definition of real zero, and the black button for activation of procedure of definition of zero?

[Gerald D]

Dmitriy, Sean is telling you that he has built his machine exactly like you want it. He uses the black button for activation of procedure of definition of zero.