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CNC-conversion
Project start: 2006-09-01

Since I bought my first milling machine, I planned to convert it to a CNC mill.
For many years it were only plans, but now I finally started to buy the parts I'm going to need.

I sold my old mill and bought a new Sieg X2 Mini mill:
Specifications
Drilling capacity
13 mm
End mill capacity
16 mm
Face mill capacity
30 mm
Headstock travel(Z)
180 mm
Cross axis(X)
100 mm
Longitudinal axis(X)
220 mm
Spindle rotary angle
-45-+45
Output power
350 W
Spindle taper
MT#3 or R8
Spindle speed
low range
0-1100 rpm 10%
High range
0-2500 rpm 10%
T-slot
12 mm
Weight(net/gross)
50/68kg
Packing size(LxWxH)
540*500*760 mm
   
   

A HOBBYCNC PRO Chopper Driver Board Kit from www.hobbycnc.com, complete with Nema 23 stepper motors.

Specifications:

  • 3 or 4 Axis Unipolar Chopper control.
  • Individual OR simultaneous control of 2/4 Phase Stepper Motors.
  • Accepts 5, 6, or 8 wire stepper motors only.  4 wire types are not usable.
  • 42VDC maximum input voltage, 12VDC minimum input voltage. 24VDC Minimum Recommended Voltage.
  • 3.0 Amps Maximum per Phase, 500ma (.5A) minimum. Each axis adjustable throughout this range.
  • 1/1, 1/2, 1/4, 1/8, and 1/16 Microstepping.
  • Step and Direction Control.
  • Idle Current Reduction to 50% when idle for 10 seconds.  Can change this time delay.
  • Built In Protection Circuit to help against blown chips on stepper motor short or open connections.
  • 3.7" by 6.8" double sided with top silkscreen and thru plated holes and lead free solder PCB.  (RoHS compliant).
  • Power On Reset.
  • On board voltage regulation for 5-volt logic with 24VDC cooling fan from motor power supply.
  • On board connections for home and limit switches with 10K pullup resistor provided to each. No need for a separate "break out" board.
  • Minimum of components to make assembly fast and easy!
  • Works with Step and Direction software such as DeskNC, TurboCNC, Mach2, etc

A kit with three NEMA23 motor mounts, thrust bearings for each axis, shaft collars, lovejoy spider motor couplings, a BALLSCREW for the Z axis, and metric cap screws. from www.cncfusion.com

2006-10-20 This is the controler box that is ready for use:

This is the mill that is going to be converted. As you see I 'borrowed' our guest room.

2006-12-02 Finally ready.
Of course there are always things that can be done better: for example I will upgrade the X and Y axis.
But for now I', happy. My first real build, was a mount for my Dremel. With it's 22000 RPM I can now mill and drill PCB-boards as well.
 

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