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K40 40W Laser Mechanical End Stop Upgrade

by Area51 May 2, 2016
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Another thing I noted was that the Y endstop is at the bottom instead of at the top. I assume this works fine with your replacement board but no good with the original (unless there's a way to reverse the default homing from top left to bottom right?

I moved the homing position for the Y axis down to make the working area larger and simplify the homing mechanics.
You need to reverse the homing direction for the Y axis in the software and set it to zero at home position.
To my knowledge the "original" controller has been changed over the years - it would be best to check your controller before making the upgrade.

I am myself considering switching to Arduino GRBL Laser controller as this controller is open source and well supported by the community on the net.

Has anyone with the standard board got a wiring diagram?

Thank you :)

i would be interested in your wiring, it seems i got a different model as i have 2 optical switches which are connected by a flat wire, i´m a little confused if i should try your design ^^

I've changed the control unit in my K40 to a PoKey based device from PoScope, so a chart of mine won't help you.
Originally, my K40 had an optical and a mechanical end stop - I change it to two mechanical end stops and mounted them as shown here.
I am still using this upgrade on my K40.

thank you very much for your comment :)

Could you talk about your bed setup in the pictures? Is that a 3D printed frame holding slats and are the bolts at the corners used to adjust height?

The slant bed is cut from a thick HDPE sheed on a CNC machine. The corner bolts is for bed hight adjustment.
The bed has now been rebuild and I am using a steel grid instead (See http://www.thingiverse.com/thing:1536735).

K40 40W Laser Table Disc Spacers/Standoffs M3/M4 Bolt
by Area51