Using a pen as tool

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stankern
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Joined: Tue Nov 27, 2007 3:21 pm
Location: ontario canada

Re: Using a pen as tool

Post by stankern »

this is what I made up , its spring loaded
works fine

pencil


sharpie

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highpockets
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Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Using a pen as tool

Post by highpockets »

Well done!!! Looks like a really good design and simple.
John
Maker of Chips

CarveOne
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Model of CNC Machine: Home built designs - 3'x4' and 5'x12'
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Re: Using a pen as tool

Post by CarveOne »

There is no real requirement to mount the spring loaded pen or pencil into the collet and worry about the router/spindle rpm or mechanical rotation. I made one for one of my early machine builds that was a brass tube with a spring loaded BIC ballpoint pen inside. The tube was mounted to a scrap wood block that was C-clamped to the router mount in front of the router. x-y zero the pen at the x-y starting point and set the pen a little below the surface to pre-load the pen and it worked fine. Keep the length of the protruding pen/tube reasonably short so that it doesn't flex and you will get accurate drawings. Slop in the pen can be due to too loose of a fit inside the tube. Too snug and it will not follow any minor unevenness in the surface. Be aware that if the drawing is too close to one of your travel limits it may crash if you don't have limit switches. The router/spindle collet is offset from the pen location by a few inches and as long as that is acceptable, there won't be a crash.

CarveOne
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http://www.carveonecncwoodcraft.com

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Mike-S
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Model of CNC Machine: Joe's Hybrid 4x4 (but 3x3)
Location: Hayesville, NC

Re: Using a pen as tool

Post by Mike-S »

I added an extra bracket for the pen on my diamond scribe arm.
The arm snaps onto the router where the dust shoe normally sits and no need to remove the router bit.
Attachments
Pen-Scribe.jpg

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