Showing posts with label router. Show all posts
Showing posts with label router. Show all posts

Thursday, December 20, 2012

My future toy or the long road of DIY cnc router

Just to start from somewhere, I purchased this kit with double shaft steppers, 3Nm ... a bit weak* :
http://www.ebay.co.uk/itm/380531764624?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Next step will be purchasing the spindle, but cause they are expensive (way too much if you ask me; 170 pounds for 1kW with 8mm collar and 42-43mm collet @ 10k-29k rpm) I'll go with proffesional 1-1.5kW drill with manual regulation of rpms, which will be converted to digital regulation later. Probably will change the collet for using with bigger cutters/bores.

3rd step is buying/making all the other parts for the project:

  • the profiles for the main construction - the gate/portal and the base. Working area will be 1200mm x 1200mm x 250mm (that's right - 250mm Z-axis)
  • lead screws 2x ~1300mm for X- and Y-axis (50mm for each end-connection - motor) and 1x ~350mm for Z-axis
  • ball bearings, probably industrial class model(s) resistant to radial and axial loads
  • additional cables
  • stepper drivers 1/256
  • casing for the router control panel
4th step is a bit dificult cause the whole machinery will be commanded from mini Android PC, but for now I don't know if there's a Mach3 or similar program for Android OS. Also I don't know if it is problem-free to connect the breakout board to usb ports with Parallel-to-USB adapter and they work well under Andro ...

* - 3Nm is cool for soft materials but it's a lot cooler to see 200Nm steppers of proffesional milling machine with weight around 1500 kgs that move a block of steel .45 with dimensions 600mm x 600mm x 200mm