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IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > Cheap Linear encoders for position feedback
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  1. #1
    Neuer Benutzer
    Join Date
    Jan 2013
    Posts
    172

    Cheap Linear encoders for position feedback

    I am beginning to research converting my grizzly 1006 benchtop mill to CNC, It's in good shape and am planning to convert it.

    Is it possible to use the cheap chinese encoders for position feedback on a CNC mill? Like theseT23013 24" Remote Digital Readout, Inch/Metric/Fraction

    I have used these for a few different projects and decoding them is quite simple.
    Yuriy's Toys: Reading Gtizzly iGaging Digital Scales with Arduino
    21 Bit Protocol Scales | shumatech.com

    The are accurate up to .001". I have had some of these on my manual mill and they are still accurate.

    I understand eliminating backlash is for more than just position accuracy, but it seems like these could solve the accuracy issue.

    If someone has done it already could someone point me to a link where it's been done? After hours of searching I still can't find it.

  2. #2
    Junior Member
    Join Date
    May 2006
    Posts
    3243
    Hi TTalma,

    I don't have any experience with those but it would be pretty easy to try with our KFLOP Controller. Just pulse the clock 21 times and read in the position as a serial stream. We have a closed loop stepper mode that could use that as feedback. It looks like the update rate might be somewhat slow. I would love to see someone try it.

    Regards
    TK
    http://dynomotion.com

  3. #3
    Registered
    Join Date
    Nov 2011
    Posts
    16
    I haven't experience with subject, but it's good old idea. I saw in the Net small CNC 3 axis machine. Those guy used calipers for XY and Z travel 50mm(2") caliper free. Common problem is pretty low speed of DRO. Perhaps its useful up to 10-20 inch per minute. up to 500mm per min.

    I wish you good luck.

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