Author Topic: Set z axis to zero with pen or pencil inserted in mill  (Read 207 times)

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Offline dragon_sa

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Set z axis to zero with pen or pencil inserted in mill
« on: January 05, 2019, 07:11:26 AM »
Hi All

Just wanting to know if and how to set z manually in mach3 before running the gcode.
I want to insert a pen or a pencil set zero and run the gcode, I have the auto zero feature with the sensor but I dont believe that will work with a non metalic tip in the router, so is it possible to lower the z axis and set the 0 height before running a job. I am new to mach3 and just crushed 1 pencil testing :P so thought i would ask

Hope it makes sense

Cheers

Offline Tweakie.CNC

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Re: Set z axis to zero with pen or pencil inserted in mill
« Reply #1 on: January 05, 2019, 07:32:49 AM »
Probably the easiest way of resolving this is to use a spring loaded pen / pencil which can be manually lowered to the work surface, zero set, then raised to a clearance height before starting the Gcode.

You may need to use a bit of imagination to construct the spring loaded pen / pencil but (if only the forum Search facility was working) there are many examples here on the forum. I use a spring loaded knife for vinyl cutting and the height for this is usually set the way I have just described.

Hope this helps.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline dragon_sa

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Re: Set z axis to zero with pen or pencil inserted in mill
« Reply #2 on: January 05, 2019, 07:43:31 AM »
So which button do I click to manually set z for the job, as normally I would just put down my probe and hit auto zero, the hit start, it would return home then execute the gcode.

In my test I inserted the pencil into the collett..lowerd the z axis to 1mm above the material using a plastic packer.mmy gcode was set to -1mm...but I clicked remember under auto tool zero...thinking this would remember my z height....wrong...I lifted the z axis clicked run...the mill moved across and just pushed the pencil into the board...so I guess I want to know how to manually set the z tool height without auto zero function.

Thanks for your help :)

Offline Tweakie.CNC

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Re: Set z axis to zero with pen or pencil inserted in mill
« Reply #3 on: January 05, 2019, 07:55:38 AM »
I use the jog keys to lower the Z axis  then Zero the axis DRO when the cutter is touching the surface of the work.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline dragon_sa

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Re: Set z axis to zero with pen or pencil inserted in mill
« Reply #4 on: January 05, 2019, 08:37:37 AM »
Thank you for that...it seems to be working now, thought I would see if it would do a drawing...I made sure the spindle didnt turn on and it has started drawing :)


Offline Tweakie.CNC

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Re: Set z axis to zero with pen or pencil inserted in mill
« Reply #5 on: January 09, 2019, 02:44:45 AM »
Hi Dragon_sa,

Now the forum search function is back here is a link to probably the simplest spring loaded pen;  https://www.machsupport.com/forum/index.php?topic=16012.msg108100#msg108100

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.