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IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > TB6560HQ microstepping stepper driver chip
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  1. #1
    Join Date
    Jan 2005
    Posts
    364

    TB6560HQ microstepping stepper driver chip

    I wonder why I can't find any reference to this chip being used here on the zone and even on the net. Looks like nobody uses this one.

    To me it seems a good solution: single chip for bipolar motors, selectable from full to 1/8 microstepping at 3.5A peak current.

    I did buy some on Ebay and made a few prototype PCB's and tried it from 1AMP up to 2.3AMP.
    It works fine and price is OK, approx. 10 Euro for a chip and really minimal external components required.

    But they have a few disadvantages:
    - Low power supply: Absolute max. 40V
    - Low step rate: 15kHz according to the datasheet.
    - No simple current setting: only selected by the value of the current sense resistors or the 4 combinations of torque setting.
    - Noisy motor when not moving (but this could be due to my prototype PCB design).

    Positive stuff:
    - Single chip doing everything.
    - Very low price.
    - Few external components.
    - Extremely low power dissipation: at 2 Amps/phase a very small heatsink is sufficient.

    Datasheet is here:
    http://www.toshiba-components.com/pr...31_060531_.pdf

    I do use them on a PS of 33VDC at 2.3Amp with Sonzeboz stepper motors (2.4 Amp/phase) and it works great.

    Does anybody else have experience, comments on these?

  2. #2
    Join Date
    Apr 2007
    Posts
    1955
    Hi - This is an interesting idea/ chip.

    I wonder if there is a higher power version as well ?

    Do you think 2 could be run together to double the current ?

    The resolution is a bit coarse for my needs, but it is interesting.

    I thought maybe IRC www.irf.com might offer some kind of stepper motor drive module, but I didn,t find one. They did have some 100v fets that could be a partial solution.

    http://www.irf.com/product-info/data...rfb4110pbf.pdf

  3. #3
    Join Date
    Jan 2005
    Posts
    364
    Quote Originally Posted by harryn View Post
    I wonder if there is a higher power version as well ?

    Do you think 2 could be run together to double the current ?
    Not that I am aware off, there is a lower one available: the TA8435H at 1.5A average.

    Electronically connecting 2 in parallel will almost certainly result in smoke.

    But I am thinking on a different approach to double the output current, I can't test it right now as there's only 1 chip left.
    I expect to receive some more this week and will try it when they arrive.

  4. #4
    Join Date
    Jun 2003
    Posts
    3312
    Problem with this part is it's hard to get in the US. 2nd is it's max clock speed. At 15 khz it severly limits the functionality of the chip while microstepping.
    Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
    Vist my websites - http://pminmo.com & http://millpcbs.com

  5. #5
    Join Date
    Jan 2005
    Posts
    364
    Quote Originally Posted by pminmo View Post
    Problem with this part is it's hard to get in the US. 2nd is it's max clock speed. At 15 khz it severly limits the functionality of the chip while microstepping.
    Phil,

    I did test it briefly at higher speeds and it did work but I don't remember the speed anymore.
    What I do remember is that at those high speeds the low supply voltage became the limiting factor.

    Did you ever find the time to test this?
    http://www.cnczone.com/forums/showthread.php?t=24297

    This is what I had in mind to double the current.

  6. #6
    Join Date
    Jun 2003
    Posts
    3312
    No I completely forgot about it. But I don't really see it as a real workable solution.
    Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
    Vist my websites - http://pminmo.com & http://millpcbs.com

  7. #7
    Quote Originally Posted by pminmo View Post
    Problem with this part is it's hard to get in the US. 2nd is it's max clock speed. At 15 khz it severly limits the functionality of the chip while microstepping.
    So is this what the OSC pin with a capacitor controls? When you say it severely limits the microstepping- what exactly is limited? Sorry for what probably seem like stupid questions.

    Cheers
    Sam

  8. #8
    Join Date
    Jun 2003
    Posts
    3312
    Quote Originally Posted by samroesch View Post
    So is this what the OSC pin with a capacitor controls? When you say it severely limits the microstepping- what exactly is limited? Sorry for what probably seem like stupid questions.

    Cheers
    Sam
    The clock speed spec is referring to the max step rate, not the same as the oscillator frequency. There is a relationship, but it's not direct.
    Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
    Vist my websites - http://pminmo.com & http://millpcbs.com

  9. #9
    Join Date
    Jan 2010
    Posts
    1
    I ve bought a four axis controller bord with tb6560HQ´s on it and it works quiet and great and after some badly running L297\L6203 selfmade solutions, this is it.
    So I did buy eight of theese smileys, to create my own PCB.
    Yet I started layouting, with the chip in a lying position to use both copper layers, with the chip in a hole in the pcb plain, looks nice. Now I am struggeling with the direct control via digital Joystick. Seven comparators and some and´s giving direction- ,and using a 555 the clock-signal (here I had to change some)
    found this on the web, have a look and tell me some
    Attached Thumbnails Attached Thumbnails servo poty.gif  

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