Lets see your round column conversions

[eScott]

Sorry if this topic has been beaten to death. I have the Harbor freight round column milling machine ( http://www.harborfreight.com/cpi/cta...emnumber=42827 ) and want to convert it to CNC. X and Y seems pretty straight forward after searching, but I'd like to see what other people have done to convert the Z axis. I've found a few threads where others have done it, but not a lot of info on how they went about doing it. TIA

[Bubba]

Hi,
I have a RF-31 round column, but as far as the Z goes, they look very similar.

In my case, I removed the micro feed hand wheel and replaced it with a timing pulley. This is driven by a servo and in my case, I used a 2:1 ratio. I also found that by loosening the two screws that hold the pinon case on the side (part # 143 on page 16 of the manual) and tapping the whole housing towards the front, I eliminated most all of the backlash. Yes, there is still some, but not enough to give me problems. I also removed that stupid spring on the other side and used a counterbalance to give a higher pulling effect.

[eScott]

Thanks, I was wondering if using the micro feed was the best option. I'm not too worried about backlash at this point for the type of work that I'm doing, but I'm sure it'll come into play later on. If you have any pictures of your set up I'd like to see them.

I also Have a full size milling machine. I haven't even thought about looking into converting it until now. I guess I'll start researching it but I'd like to get started on something next month.

[readw]

I am currently undertaking a round column conversion. I have completed the X & Y axis so far and currently working on the Z. I will be fitting the Z into the recess in the head. If interested I'll post some pictures as I go.

Warren

[eScott]

Originally Posted by readw I am currently undertaking a round column conversion. I have completed the X & Y axis so far and currently working on the Z. I will be fitting the Z into the recess in the head. If interested I'll post some pictures as I go. Warren

I'm VERY interested in seeing some pictures. I've only been researching this for the past couple of days, so my knowledge is limited. In the hours I've spent searching the internet, this forum has been the best source of information.

I'd like to do something similar to this. http://www.cncmasters.com/