Seeking: Non-conductive touch probe for auto leveling - SO3

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KAScnc
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Joined: Sun Nov 29, 2015 1:27 am

Re: Seeking: Non-conductive touch probe for auto leveling -

Post by KAScnc » Tue Feb 09, 2016 3:00 pm

I have that IR sensor in one of my 3D printers. It works okay, but I prefer a physical contact for leveling.

Different surfaces will detect at different heights. When I get home I'll toss some wood under it and see how it detects.

cvoinescu
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by cvoinescu » Tue Feb 09, 2016 5:13 pm

I'm pretty sure MDF will reflect enough for that detector to work.

I thought that the whole idea with the differential sensing was to eliminate material type from the equation. Although I now realize that, because of the angles, specular reflection (shiny surfaces) may throw it off.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

woodworkerbob
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by woodworkerbob » Tue Feb 09, 2016 5:28 pm

cvoinescu wrote:I'm pretty sure MDF will reflect enough for that detector to work.

I thought that the whole idea with the differential sensing was to eliminate material type from the equation. Although I now realize that, because of the angles, specular reflection (shiny surfaces) may throw it off.
I was concerned about plywood having a varied surface color causing difficulty. I don't understand this technology, so I'm only guessing.

Bob
Shapeoko 3 - #13, dust deputy, precision collets, limit switches.
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cvoinescu
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by cvoinescu » Tue Feb 09, 2016 5:33 pm

You may be right, I can see how texture may affect the accuracy of the measurement. Better go with mechanical, then.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

woodworkerbob
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Location: SVE - Mesa, AZ

Re: Seeking: Non-conductive touch probe for auto leveling -

Post by woodworkerbob » Tue Feb 09, 2016 5:52 pm

cvoinescu wrote:You may be right, I can see how texture may affect the accuracy of the measurement. Better go with mechanical, then.
But that IR thingy looked soooo cooool!
Shapeoko 3 - #13, dust deputy, precision collets, limit switches.
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woodworkerbob
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by woodworkerbob » Tue Feb 09, 2016 6:01 pm

Maybe I'm over thinking this. Isn't this just a switch on the end of a stick attached to the Z axis plate? The "stick 'n switch" (patent pending - copyrighted) should be removed easily so it's not in the way during routing operations. Wires up to the controller. That's about it?
Shapeoko 3 - #13, dust deputy, precision collets, limit switches.
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Fablicator
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Joined: Thu Jul 02, 2015 7:59 pm

Re: Seeking: Non-conductive touch probe for auto leveling -

Post by Fablicator » Tue Feb 09, 2016 6:23 pm

woodworkerbob wrote:Maybe I'm over thinking this. Isn't this just a switch on the end of a stick attached to the Z axis plate? The "stick 'n switch" (patent pending - copyrighted) should be removed easily so it's not in the way during routing operations. Wires up to the controller. That's about it?
Yes, exactly.

Fablicator
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by Fablicator » Tue Feb 09, 2016 9:22 pm

woodworkerbob wrote:Been trying to do some engraving and have found my waste board and/or the working material is not flat enough. I work with wood and plastic so the PCB conductive probes won't work for me. Yea I could stretch some aluminum foil over the working material, but I'm not sure that would work all that well. I have used the AL foil trick on some non-SO3 CNC equipment to set Z=0.0, that works great!

Any suggestions?
Bob

I'm building one to sell right now. Trying to make it clip over a 1/8 or 1/4 bit. Maybe I'll offer both. Any preference here?

Initial results are promising, and it will definitely be under $100

It will only be able to do up to a variation of about 1mm per 20mm of travel, but that should be fine for most applications.

~Andrew

Estlcam
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Re: Seeking: Non-conductive touch probe for auto leveling -

Post by Estlcam » Tue Feb 09, 2016 9:47 pm

You don't need a fancy 3d switch for auto leveling - a simple microswitch for a few cents will do just fine.
You just need to make sure it never bumps into something from the side - but this shouldn't be a issue for most auto leveling applications as there are usually no high or steep edges.
Estlcam CAM and Arduino UNO CNC controller: www.estlcam.com

Alden1qa
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Joined: Thu Jul 28, 2016 9:09 am

Re: Seeking: Non-conductive touch probe for auto leveling -

Post by Alden1qa » Thu Aug 04, 2016 10:09 am

Here you can also get the free models STL,http://www.jgaurora3d.com




....................................................................
desktop 3D printer
jgaurora3d.com

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