Which rotary table to CNC? [adding to last message]

I Just realized, looking from LMS, that these rotary tables are so cheap
because they're 1:36. So ten turns of the hand wheel, I get 1 turn on the
table. LMS and HF sell the same cheapie table.

With 1:1 gearing, 0.72 degree/step five phase stepper motor, and a gecko
G201. Max theoretical resolution would be: 5000 steps to gecko G201 -->
500 steps to motor --> 1 turn of the motor --> 1 turn of the hand wheel -->
10 degrees of the table.

Would this mean that I have 0.002 degree per step?

I'm wondering is it a good idea to purchase one these? Or go for the 1:72
gear ratio ones?

Thanks.


-----Original Message-----
From: Lloyd Leung [mailto:lloyd@...]
Sent: March 26, 2003 4:31 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Which rotary table to CNC?

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46132

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=47052



I don't need anything larger then a 4".



1.) Is there a better place to purchase from?

2.) So I'm curious has anyone CNC'd either of these, if so, how'd you
make the mounts? Could you share some pictures?

3.) How's the backlash in the worm?



Thanks.



[Non-text portions of this message have been removed]


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