View Full Version : CONVERSION: beginning conversion new Proxxon MF70

30-06-2016, 10:01 AM
hi, I have buy a new proxxon MF70, and I want find all parts for convert it...

by first steep - I want replace the motor and spindle original with a motor brushless and spindle ER-11 and your bearings
by second steep - extend table Y
by third steep - convert to cnc with nema 23, supports for them, controller and drivers.

for steep 1 - by check on web info, I have found a discussion about the replacement of only spindle with a new ER-11 spindle diameter 10 and 12 mm but on motor original. Also I have a dubt

I not found a real conversion with more details for buy a right spindle and motor together, my dubt: what motor I will buy ? what size power watt (300w up to 400w) ? What motor better that fit in head proxxon without make a big modify ? what type and right spindle ER-11 (C10-ER11A-100L or C12-11A-100L to mount on motor original proxxon) ?
C10 = 10mm diameter C12 = 12mm.

Someone have a link or right istructions how to make this mod with all parts details ?

Lee Roberts
30-06-2016, 09:06 PM
Some links:

PROXXON - MF 70/CNC-ready (http://www.proxxon.com/en/micromot/27112.php)
Building the KRmf70 CNC — Kronos Robotics (http://www.kronosrobotics.com/mf70/)
Proxxon MF70 Miller CNC CONVERSION - theBox (https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwj56Z6Pt9DNAhWBKcAKHXrQC7wQFghEMAY&url=http%3A%2F%2Fwww.thebox.myzen.co.uk%2FHardware %2FCNC_Conversion.html&usg=AFQjCNHls8RTp7-V2UWJijTjK8cTAB_qPA&sig2=t5I0M24mMN6sM6y5s6ftkA)
Should get you started with some of your questions.


30-06-2016, 09:30 PM
I used to have an MF70 and documented extending the Y axis here:

Why change the spindle? I doubt the tiny mill could handle much more power.

30-06-2016, 10:03 PM
Why change the spindle? I doubt the tiny mill could handle much more power.

I case : I have think if leaves a original motor ,I will change only the spindle same diameter 10mm but have a ER11 chuck for drill up to 7mm.
II case, if I will replacement motor original with a bushless power up to 400-500Watt, I need increase the diameter spindle because the new bushless motor have more power..

28-07-2016, 02:04 PM
the diameter of shank er11 is same the diameter bearing proxxon mf70 , I have also a new motor brushless 600watt power.

12-12-2017, 06:52 PM
Old post but...can you give some details about motor, adapters, spindle etc? I have a burned MF70 motor and it's time to move to a brushless one...