Dremmel扩展模块（适用于Ender3 V2）

Dremmel Extender for Ender3v2 (makeshift CNC)

2024-04-29 01:23:33

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Summary

This is a very simplified adapter for attaching a Dremmel Flexible shaft (Dremmel 225-02) to a Ender 3 V2, and turning it into a makeshift CNC. (emphasis on makeshift, see dremmel assembly)

This was not tested in any other printer. From the internet images, the holes don't match other Ender 3. This was not tested with other flexible shaft (if it exists). I used a flexible shaft to take off the weight of the Dremmel, and used this one because it was the option available.

This was tested on PTFE and worked fine for my uses. Used a few VHB tapes to attach the work piece to the bed. Probably will not be as fast, or precise, or rigid, or anything a CNC is, but for my 1mm depth-of-cut, 2mm milling cutter it was fine. Not willing to risk more, not willing to try, already have my piece.

To assemble/use it, you'll need:

A Dremmel (mine is Dremmel 3000)
The flexible extension shaft (Dremmel 225-02)
The 3D part already printed
2x M2.5 20mm screws (to attach the piece to the printer)
a >10cm nylon cable tie (or anything that replicates the funcion)
some padding/flexible material, with ~20x20x2mm (I used a bit of VHB tape, but any slight smushable material should work)
A 1/8" shaft milling cutter (for the default collet)

Instalation procedure

Install the flexible shaft to the dremmel, following its instructions.
Unscrew the original "cap"/finger saver from the tip to reveal its threads
Attach the padding material to the 3D part in the position in the image if it is gluable. If not, add it after screwing.
Screw the flexible shaft into the 3D part. DO NOT SCREW IT TIGHT. In my brief experience, the plastics of the shaft smushes a little. Best case scenario, the extension plastics melt and get out of the way, worst case you can lock the shaft or create a fire. If you are not sure, screw it (carefully) with the dremmel turned on.
Attach the padding material now if it is not gluable, between the 3D part and the shaft.
Lock the shaft to the 3D part, using the cable tie trough the available hole.
Screw the screws partway trough
Attach the 3D part to the printer, pushing the piece from left to right
Screw the screws until it reaches the other end of the 3D part. No need to put force here. It just barely locks the 3D part to the carriage. If it wobbles, put some padding.
Attach the milling cutter

https://cad.onshape.com/documents/8c89548646f4e035e3eee621/w/7efaff4771167cad4c5d4017/e/6bcbbbdb74cb01419abee684?renderMode=0&uiState=662e782e88baa73070203d55