Crazy idea for a low cost, highly accurate CAM system which can be made without precision tools.
Uses a long bolt, with a nut holding the head of the bolt to the base plate then a nut followed by a washer (small so it just covers the inner race) and then the bearing, then another small washer and a nut. Repeat that for the second bearing at the top... then between the two, there are large washers with a very large hole that clear the small washer and nut and those washers are drilled and screwed down to the top and bottom of the aluminum box tube. These will probably have to be 4 of the large washers, above and below each of the bearings. Perhaps the main wheel will go between two of these and be a press fit around the outside of the bearing.
This shaft could be the same as the one above or it could use a rotary air joint in order to supply a vacuum vice in the second disk.
We have :
|# of Models in Series||3|
|Step Size (deg)||5.0|
|Best Accuracy (arcmin)||15.0|
|Cont. Holding Torque (N-cm)||22.6|
|Rated Current / Phase (A)||1.0...2.0|
|Nominal Voltage (VDC)||3.4...6.8|
|# of Models in Series||10|
|Step Size (deg)||1.8|
|Best Accuracy (arcmin)||5.4|
|Cont. Holding Torque (N-cm)||14.8|
|Rated Current / Phase (A)||0.4...1.2|
|Nominal Voltage (VDC)||3.0...10.0|
Who is the author of this article? I need some info on "AstroSyn PN: EM-217 Type: 17PM-K041-P2F NO: T4Y24". Can he/she contact me? Thank you in advance
James Newton replies: http://www.ni.com/devzone/advisors/motion/mineaba.htm Your unit (or at least its series) is listed there along with the specs.+
Cutting the first wheel (or trying to) with a Dremel and a Roto-Zip bit clamped to the box tube arm. Lots of chatter with course bits and lots of clogging up with fine bits. My saber saw does better, and the rotary tool can then be used to clean up the cut. +
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<A HREF="http://www.piclist.com/techref/idea/lccam.htm"> Low Cost CAM idea </A>
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