[eqreservoir]

Hi Arc

Please provide the part number and source for the motor to leadscrew couplings you used?

Money is a little Scarce right now. Was wondering if there was a decent way to build an anti backlash nut or buy a nut so I can use the original leadscrews until I could afford ballscrews.

Thanks.
Herman

[Jackyl]

That is a very nice setup you have so far. I just picked up a mill like this. I bought mine from MSC. It's the Rong Fu model. I've had it for a week now and I want to convert it over to cnc operation. I found a like to a place that sells a complete retrofit kit.

CNC JR Retro Kit

I'm really considering it because with the cost of the mill and the retro kit it would be under 6g coplete. I can't touch a used knee mill for that, not to mention a new unit. Everything is like 11g and up.

I look forward to seeing how your project works out. This forum has alot of information that confuses me greatly I wish that there was just a walkthrough for instalation and what parts needed to be bought to complete the conversion for these mills.

[Arc]

It Lives! Man I have been so damn busy as of late. Anyways I convinced a few buddies to stay over and we cranked it out. The system is working pretty good. Just have to set up the right scale and rackmount the power supply etc. I'll post pictures in the AM. :cheers:

[Arc]

As promised here are some more images of it in a completed state. I just also want to add a side note and say thanks to all the folks on this site. You have all inspired me to make this happen.





The rest and pretty much all the images from start to finish can be found here. RONGFU 31 If I can be of help to anyone here just ask. I myself am still learning so it works both ways. :cheers:

[ngr1]

Hello, great conversion… hope you do not mind a few questions.

Do you have the ball nuts mounted in c-channel? How are they held in?

[ngr1]

Great idea to use the original bearing blocks. Are the smaller items clutch bearings? To install the large bearings did you have to bore out the original bearing blocks?

How did you machine the ball screw ends? Any pictures of those?

Do you mind sharing the bearing part numbers?

Thanks… Norman

[Arc]

Great idea to use the original bearing blocks. Are the smaller items clutch bearings? To install the large bearings did you have to bore out the original bearing blocks?

How did you machine the ball screw ends? Any pictures of those?

Do you mind sharing the bearing part numbers?

Thanks… Norman

Hey Norm I used the original bearing blocks without any machining done to them. I was able to find the perfect size at Mcmaster Carr. I'll throw up the part numbers in a few days. I have to find them first. I opted for the original bearing blocks because I figured that would be the easiest way. As far as the ball screw I used a Rotron 5/8 with 6TPI. I had to use my grinder and once I got it done far enough I threw it on my lathe. I suppose I have some pictures of the ballscrew somewhere. If not I know that I have a dxf drawing with the exact dimensions. I will put those up as well.

[Arc]

Hello, great conversion… hope you do not mind a few questions.

Do you have the ball nuts mounted in c-channel? How are they held in?

I simply drilled and tapped out for 8/32 set screws to hold the aluminum into place. I also used a threadlocker just in the event that over time the use would loosen the screws up.