Hello

I am planning on converting a Homier mini mill and I was wondering what size stepper motors I should use. I am planning on using the Xylotex driver board. Also, if I were to convert it to ball screws, which size would I want to use.

Thank You

Oh Yeah,
I am planning on using a direct drive

I'm going with belt driven here is a pic

here is the bottom-
http://www.cnczone.com/gallery/data/500/1109_0916.jpg

Paul it looks like you are also using those cheap servos I discovered a few months ago. I should have charged a finders fee for the website of where to buy them. If I had my machine would have been built and paid for by now.

:withstupi :withstupi lol

I got the servos from a advertiser here on the site.

Paul I’m assuming you mean HomeCnc?

From the photo I’m almost sure they are the cheap servos I posted about.

http://www.cnczone.com/forums/showthread.php?s=&threadid=2082&highlight=cheap+servos


And can be got here for $9.95

http://www.automec-direct.netfirms.com/html/clifton_dc_motor.html

When I found them I e-mailed Jeff to see if they where any good, I also asked Marris about them. They both said they where excellent servos, so I got 3 sitting in the closet waiting to be put to use.

Jeff got a few cases if I remember correctly and machined them to hold encoders and was selling them.

I’m just glad to see that several members of the forum are using them. It’s good to know that all that time I spent searching the net for servos has paid of for people other than just me.
:D :D :D :D

Paul, are those ball nuts and screws from Roton. Are the screws 5/8"?

Thanks

Yes and yes.

I looked at those the other day and almost ordered some. i went back today to do the deed and now they are $18!

They probably figured out why so many people are buying them. Now they are going to demand more for them because they know they can get it.

18 dollars for brand new servos that normally cost $90 is still a good deal in my opinion.

Hello

I am planning on converting a Homier mini mill and I was wondering what size stepper motors I should use. I am planning on using the Xylotex driver board. Also, if I were to convert it to ball screws, which size would I want to use.

Thank You

I CONVERTED MY HARBOR FREIGHT MILL TO BALL SCREWS AND USED THE CHEAPEST ONES THAT MCMASTER SOLD. JUST GO TO MCMASTER.COM AND LOOK UP BALLSCREW. SAVE YOU SOME MONEY AND USE A PULLEY REDUCTION FOR YOUR STEPPER MOTORS. FROM WHAT IVE READ, YOU SHOULD BE ABLE TO INPUT TABLE MOVEMENT PER REVOLUTION OF STEPPER MOTOR IN YOUR CNC SOFTWHERE . SO IM ASSUMING IT WOULDN'T MATTER BUT DONT QUOTE ME.

I would get your ball screws from roton.com they will run you about 8.50 a ft for the screws and 19.00 +/- for the ball nuts.

wow those are some cheap servos! I might have to order a few, what do they need for encoders? how many oz/in are they and can they be overvolted over 30v?


I have 300oz/in steppers on my homier mill and they are doing great, the max IPM with 5tpi ballscrews is 60ipm on 30v. I have had them going 96ipm but they didnt have enough torque and would miss steps. with 50v they probably could go faster than 60.

I dont think anything less than 300 is suitable.


Jon

JFettig

check thie links in my previous post they have all the info you need.

hope this helps

Hi Paul, I'm starting out to convert my Eagle25/ Harbour freight/Rong Fu look alike.

Exactly which ball screws are you advocation. Lenght , pitch etc would be a great help. Any thing else I need. Pillow blocks etc ?
Thanks
George