Pen/Sharpie holder for 500W CNC Spindle

thingiverse

I wanted a pen holder for my MPCNC but did not want to disassemble the spindle. That pen holder fits to the spindle collet shaft and accept pens or sharpies up to 13mm. As the sharpie fixed in an angle it is possible to set its tip to the axis of the spindle. It has a small stop, so it is possible to make repeatable setups. To prevent the rotation of the spindle I made a simple stop what fits to the fan on the top and with a simple M5 screw you can fix the spindle, so the sharpie won't rotate. Since the photos I upgraded the stop to make it stronger. Use only if your surface is pretty even as it has not any flexibility to compensate. Let me know if you have any feedback!