UPDATED E-stop knob, parametric-ish
by MichaelAtOz, published
This is designed to replace the standard black knob on a push-off pull-on switch.
I will be using it to control the ATX power-on line, i.e. pin 13 to ground to turn the power supply on.
It will be part of my Printbot control panel, a WIP.
I can't recall where I got the switch, but presume it was in my local car accessories shop.
These are what old cars, really old, used as headlight switches. Without relays.
Note: Technically this switch would not qualify as a safety switch, but for me it will be enough for 12/24VDC.
UPDATE Feb 2013. I finished painting my print room and have been able to print some Things, including this.
v0-3 didn't work out well, see photos.
So I now have v0-4 with higher raised lettering (or parameter to recess), and wider at 17.5mm. Looks much better.
I also changed my slic3r retraction movement to 1mm, prints much cleaner, compare the middle one to the righthand one in the photo.
TIP: When utilising write.scad, use 'include' not 'use' as there are variables which don't get set when you use 'use'.
Use the STL or edit the SCAD file for your custom knob (you will need HarlanDMii's excellent write.scad - http://www.thingiverse.com/thing:16193)
My thoughs are to print in red and use a marker to blacken the raised text.
Or if you want a challenge recess the text, join some red & (yellow or black) then red, so it prints a few slices of the other colour below the text recess.