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  1. #801
    Registered
    Join Date
    May 2006
    Posts
    180

    Re: Rotary table indexer

    Quote Originally Posted by wiseman9986 View Post
    I know this has been asked before but I couldn't find a good answer what would be a good stepper motor and driver for a 10" rotary table
    For 'normal' use a typical Nema 23 motor of around 2-4A will easily spin a 10" table.

    I use a similar motor but set the current low to just over 1A and via a 90:1 worm that turns a 10 inch swing lathe head (with drive motor still engaged) along with any work in an 8 inch chuck without any problems.

    As the load on the stepper gets higher the torque available falls, so worse case you may need to run it slower but for division speed isn't that much of an issue.
    You can get around this by increasing the supply voltage to the driver (if it's higher than the safe supply voltage for the controller then you would need a separate power supply for the controller - a small 12v wall wart type would be fine).

    So in short, find a Nema 23 motor of around 2-4A and a suitable driver with similar capabilities. (Preferable a driver with half step capability - which should be most).
    The driver doesn't need to be anything clever, just a cheap driver off eBay. They're cheap enough so you can buy a spare or two, although avoid anything that uses the L298 chip and keep the voltage a little lower than the max rated voltage.

  2. #802

    Join Date
    Aug 2020
    Posts
    3

    Re: Rotary table indexer

    Can anyone recommend a stepper driver, I had a ?Stepper™ : CNC Stepper Motor Driver Board which worked perfectly for 10 years. It has now failed and I can’t find the same one. I have tried a TB6600 stepper driver and a Stepperonline DM420Y bothe of which I cant seem to get the steps correct with. There is some microstepping issue that I can’t figure out. The old ?Stepper™ had just full, half, quarter, and eighth of which I used Half Step mode.
    Thanks

  3. #803
    Registered
    Join Date
    May 2006
    Posts
    180

    Re: Rotary table indexer

    Quote Originally Posted by Redbrown View Post
    Can anyone recommend a stepper driver, I had a ?Stepper™ : CNC Stepper Motor Driver Board which worked perfectly for 10 years. It has now failed and I can’t find the same one. I have tried a TB6600 stepper driver and a Stepperonline DM420Y bothe of which I cant seem to get the steps correct with. There is some microstepping issue that I can’t figure out. The old ?Stepper™ had just full, half, quarter, and eighth of which I used Half Step mode.
    Thanks
    Hi, the cheap and cheerful TB6600 should work fine. I use them all the time with no problems.

    Set them to half step (400 steps) and in setup on the controller find "Swap Clock Pulse" and make sure it's set to "High" (the default is "Low" for some obscure historical reason that escapes me now - when I update the firmware next I'll flip it, most drivers require it high).

    The only other possible issues are "steps per 360" is incorrectly set or there's some slippage in your hardware.


    Hope that helps.
    Steve.

  4. #804

    Join Date
    Aug 2020
    Posts
    3

    Re: Rotary table indexer

    Cheers Steve I will have a look tomorrow thanks for the advice.

  5. #805

    Join Date
    Aug 2020
    Posts
    3

    Re: Rotary table indexer

    Reinstalled the TB6600 4.5A CNC Single-axis Stepper Motor Driver Board (ebay) with no problems. Thanks again.

  6. #806
    Registered
    Join Date
    Jun 2005
    Posts
    6

    Re: Rotary table indexer

    Hi, All

    Just ordered two of the Built and Tested Modules, Keypads and Overlays from Steve Ward, a great looking product.

    I'm currently working in Germany, glad to have found this group

    Heres my youtube channel for the curious.
    https://www.youtube.com/user/CeeltdNew

    Thanks
    Carl

  7. #807
    Hi Folks, I bought the pre built/tested unit and keyboard. I've built it and connected it to a TB6600 driver a 200 step nema 23(2.8A) motor, my table is a vertex HE4 90-1 ratio.
    Everything works fine but no matter how I set it in the settings or set the dip switches on the driver the thing just won't drive right. If I set it to DEG.and set it at 90° it only turns the table 10°? I've set the driver to 400 steps and it won't run at all, in fact I can only get the motor to run properly if I set all the dip switches to the default off position. I assumed a faulty driver so replaced it with another new one from a different manufacturer and I get exactly the same results. Tearing my hair out now (which at my stage in life i can't afford!!) Any suggestions or advice will be gratefully received. Many thanks in advance.

  8. #808
    Registered
    Join Date
    May 2006
    Posts
    180

    Re: Rotary table indexer

    Quote Originally Posted by Smithwrecker View Post
    Hi Folks, I bought the pre built/tested unit and keyboard. I've built it and connected it to a TB6600 driver a 200 step nema 23(2.8A) motor, my table is a vertex HE4 90-1 ratio.
    Everything works fine but no matter how I set it in the settings or set the dip switches on the driver the thing just won't drive right. If I set it to DEG.and set it at 90° it only turns the table 10°? I've set the driver to 400 steps and it won't run at all, in fact I can only get the motor to run properly if I set all the dip switches to the default off position. I assumed a faulty driver so replaced it with another new one from a different manufacturer and I get exactly the same results. Tearing my hair out now (which at my stage in life i can't afford!!) Any suggestions or advice will be gratefully received. Many thanks in advance.
    I've replied to this via email but I thought a reply here might be of help to anyone else with a similar issue (and in case my email gets whacked by a spam filter).

    So setting the motor to 400 steps should allow it to run without any issues, that its making a noise suggests an issue between the driver and the motor.
    (More so because you can get it to move with other settings.)

    In the past issues like this are usually because the motor isn't wired correctly to the driver.
    (Usually because the motor is cross wired).
    The other possibility is a duff motor although this is fairly rare.

    So the motor has two windings - A and B.
    These are provided by 4 wires usually labelled A+, A- and B+, B-.
    They should be connected to the same terminals on the stepper driver.

    I would start by checking these.

  9. #809
    Big Thank You to Steve, this is now sorted. For some reason the high speed was set to 9000, I've reset it to 1000 and everything works perfectly.

  10. #810

    Re: Rotary table indexer

    I've looked and searched but can't find an answer so here goes - I'm a complete beginner BTW

    Do I need a closed loop system ?

    As this post was originally posted 14 years ago, I take it things have moved on a bit

    I was looking at this setup
    https://www.omc-stepperonline.com/cl....html?limit=50

    We are looking at powering a 17" rotary table for hobby use and its fist job will be a half size traction engine crankshaft.

    Many thanks for your replys
    Nick

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