Proxxon MF 70 Micro Mill CNC conversion

[HZM]

Way before we bring in the Proxxon MF 70 Micro Mill, had read many things about converting it to CNC. Did a search, most converted system use for engraving, CNC of wood panel, CNC PCB and pocketing of electronic panel. All these are quite an issue if you use manual system.



The moment the machine arrived, stripped bare the entire system to have access to the leadscrew and do necessary modification.

I am sorry, was too anxious till I forgotten about taking pics. Anyway, heres a pic of the Sherline CNC machine which was used to fabricate the mounting.










Machine is about 80% complete, just need to do some more light machining to get the coupling in place. Then it will be completed.






A pic with the iPhone on it to give you an idea the size of this machine.





Cheers

Mike

[pilot_bear]

i knew you will not let it sit there quietly.

great job.

[Adrianli]

Time for you to do some real CNC work for me? Jyheli also told me he needs some CNC work.

[HZM]

Time for you to do some real CNC work for me? Jyheli also told me he needs some CNC work.

haa.... I still thinking abt your this mount how to charge you Doing it is ok, got to flip 2 side to tap. Thats the sian part

Lets wait see JYHELI got what up in his head. If his more interesting I drop you..... haha

[student]

Help a student

Hi, I'm at student at the City College of New York. I'm working on making the same modifications you did on your proxxon. Is there any chance you can show me the schemaics of the mounting plates and screws you used? It would decrease my workload ten fold. I would appreciate it.

[HZM]

If you furnish me your email, I will send you the dxf file.

There are some obstacle during the conversion especially on the mounting the motor mount onto the machine.

Originally in place are 2 x self tapping screw. The most suitable screw thread to replace is M3 Roll tap. Unfortunately, roll tap is expensive and difficult to "go in" via hand tapping. The other alternative I found out is to use a 5-40 UNC tap. Also pretty hard to come by but we managed to get it here in Singapore, should be easy over at your country. Afterwhich you will need 5-40UNC x 1" long cap screw.

I will get you more details tomorrow.

Mike <br> <br>

[student]

Hey Thanks for the reply. My email is ssheikh02@ccny.cuny.edu (If you could send them as .prt that would be great. If not, it's no problem)
What screws did you use to mount the motor onto the plates? And what kind of screw did you use to replace the ones that were already provided? I appreciate your help.

[HZM]

Sorry, was held up by a lot of work and family.

To mount onto the machine, I replaced the self tapping screw with 5-40 x 1" long screw. You need to tap over the self tapping hole first.

To mount the stepper motor to the rod, I use M3 with spacer.

Mike

[khatiban]

Hi, how do you remove the handwheel?

[pilot_bear]

Hi, how do you remove the handwheel?

the handwheel is secure onto the leadscrew via a cup point screw.
Rotate the handwheel collar (with the scale), you will be able to see a hole, align the hole, insert the correct size alley key to loosen the cup point screw.
slide out the handwheel.

hope this help.

[HZM]

U mean Proxxon handwheel or Sherline handwheel?

[khatiban]

the handwheel is secure onto the leadscrew via a cup point screw.
Rotate the handwheel collar (with the scale), you will be able to see a hole, align the hole, insert the correct size alley key to loosen the cup point screw.
slide out the handwheel.

hope this help.

It's a rolled pin according to the manual I got from here.

http://www.proxxontools.com/store/pc/viewPrd.asp?idproduct=33

but the rolled pin is pretty stubborn and it don't seems to be coming out.

U mean Proxxon handwheel or Sherline handwheel?

Yes. Proxxon!

[pilot_bear]

Yes. Proxxon!

Sorry, my bad

[khatiban]

Sorry, my bad

not your fault
I didn't know that was a Sherline handwheel in that picture

[HZM]

The rolled pin are milled after it went through. This prevent it fr accidentally coming out. Wat I did is grind flat a small diameter screwdriver, slightly slimmer than the pin and hit it out.

Mike