2418 CNC Portal conversion v1 (Not production ready)

Warning! This thing is usable but not "production" ready. I've built it myself and I'm just sharing my expertise here. See below for details

This is a portal version of popular chineese woodpecker 2418 CNC (like this one) . I always don't like the idea of moving table on this kind of cnc, so I've tried to make a portal version using it's components as a basis. In order to build it you optionally need second set of Y axis components - motor, screw, nut, bearings. But with one set it works good too.

This was made as a working prototype and did some successful cuts but it has some design flaws, so I'm working on v2.

Current version problems:

• It's not really rigid. Single 10mm rail on each side is not enough to withstand push\pull of the milling tool. Proper linear rail should be used instead (thicker or another type, like MGN)
• Spindle holder should be printed in ABS or something temperature resistant since spindle gets really hot, melts PLA and slips out. At the moment of development I switched to 52mm spindle motor, so mount is designed for this one.
• Another option is to redesign spindle to accept standard 52mm aluminum spindle holders (like this)
• Another problem is position of front and rear frame bars. They should go below the wasteboard in order to allow long workpice to be set up on it. Also current bar location is dangerous for milling bit, since it can ramp into it.

So, lot's of problems, but at least it's working. I expect you to use f3d file. I've uploaded an stl because thingiverse forced me to do so

Print Settings

Printer Brand:

Creality

Printer:

Ender 3

Rafts:

No

Supports:

No

Resolution:

0.2

Infill:

25%

Filament: FDPlast PLA Red

Notes:

Print spindle holder in ABS if possible to withstand spindle temperatures. Use more perimeters to increase rigidity of parts

Assembly

• Redrill holes in cornerpieces
Tap M5 threads in aluminum bars where needed After building fram everything else is pretty straightforward, assembly is similar to original 2418