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Type: Posts; User: H500

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  1. Replies
    146
    Views
    13,261

    Re: 6amp 60v 10 microstep bipolar drive

    When I started the thread, my motivation was to share knowledge and to encourage others to proceed. The CPLD code worked well enough for a basic driver. I don't think there is a compelling need for...
  2. Re: TB6600HG Stepper Driver Alert LED Lit Up, Motor Not Working?

    If you connected or disconnected the motors with the power on, you probably fried the chip. The chip cost more than the driver, so it is not worth fixing. Buy another.
  3. Re: Open source servo stepper controller on Kickstarter

    The benefit of a driver like this, is that it turns a stepper motor into a brushless servo, without much increase in cost. An optical encoder will often cost more than the motor, making it hard to...
  4. Open source servo stepper controller on Kickstarter

    I came across a very interesting project on Kickstarter:
    https://www.kickstarter.com/projects/tropicallabs/mechaduino-powerful-open-source-industrial-servo-m?ref=category

    It's a servo stepper. ...
  5. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    It won't work. There are errors.

    -add a pull up on u4 pin1.
    -swap vpot and vres
    -add a 20 uS time delay between u4 pin 1 and U3. Otherwise it will chop too fast.
  6. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    The circuit won't work. The top part of the h-bridge must be driven with a high side driver. I posted a design for a cpld based stepper several years ago. I've attached the schematic. You can...
  7. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    Can you post a larger image? The text is not readable.
  8. Re: Help please with stepper motor driver setting and mach3 steps per

    If the dm542 is set to 1600 pulse per rev and your screw is 5 rev per inch, then Mach should be set to 8000.
  9. Replies
    5
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    445

    Re: Nema23 weight limit

    I am using a 5 turn / inch ball screw and a 1.6x gear reduction for the z axis. I'm using a gas cylinder, but it is not needed for my speed setting of 100ipm. It's main purpose is to prevent the...
  10. Re: question on motor inductance and amp rating of driver

    I mean the H version. Although the low speed torque will be lowered, it will maintain the torque at higher speeds. This is usually far more useful.
  11. Re: question on motor inductance and amp rating of driver

    The driver will limit the current.

    I recommend the M version with the lower inductance.
  12. Re: stepper motor became hot (about 50-60 c) with shot run time

    Why are they called essential oils when they are not actually needed for anything? :)
  13. Replies
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    756

    Re: HY-TB268-N6 Diode problems

    What voltage is your power supply? Are you sure the current is actually 2.5A? Low voltage + high current can cause the diode to overheat.

    That diode prevents damage in case you accidentally...
  14. Replies
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    2,411

    Re: Stepper motor shaft shattered!

    I never heard of drives becoming unstable, unless the inductance was so low that the drive could not handle it. I tested 1.7 mH motors with 60v without issue. The main drawback is that the motor...
  15. Replies
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    53,939

    Re: DIY AC Servo Drive - ATMega based

    The sampling rate for those scopes is far too low. The Rigol ds1052e or something similar is better. Or a used scope. I know someone selling a TDS640A (500Mhz, 2G/s) for around $1000.
  16. Replies
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    445

    Re: Nema23 weight limit

    I have no problem lifting a 115lb milling head, using a ball screw and a 280oz in motor.
  17. Replies
    9
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    1,722

    Re: Difference between two stepper motors

    The em705 is better, since you want to use 48v. There's less chance of damage due to high voltage.
  18. Replies
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    1,076

    Re: Z Axis Motor Selection

    Why don't you calculate how much torque you need before spending money on the big motors? It's a simple gear ratio calculation. Assume you need at least 100 lbs of downward force for drilling.
  19. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    I forgot that it was 5 phase. The 6600 won't work.

    Are you certain it is 5 phase, rather than 2 phase with 5 wires?
  20. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    If you are open to other solutions, the tb6600 would be much easier and better.
  21. Replies
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    1,076

    Re: Z Axis Motor Selection

    Why not use a higher gear ratio, 10:1 or more? You can achieve that with a chain drive.
  22. Re: Driving 5 phase pentagon stepper motor with L298 and ATMEGA16

    When you turn on the coil transistor, the current rises quickly. Your execution loop must be fast enough to check each coil and shut off the current as soon as the set value is reached. Otherwise,...
  23. Replies
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    1,033

    Re: Stepper Motors clunking....loosing steps

    Look for loose connections.

    Other programs, such as a web browser, could interfere with Mach.

    Reinstalling the OS might help. Sometimes the loaded drivers can interfere with mach.
  24. Replies
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    516

    Re: Short Circuit on a chinese TB6560 Board

    If all 4 chips are out, verify that the board is drawing no current from vma and vmb.

    Measure the voltage on vcc. I believe it should be 5v. If it is then reconnect one 6560 chip back in. If it...
  25. Replies
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    1,079

    Re: Mach3/USB/Arduino/TB6560 driver

    Use a tb6600 instead of the 6560. Most 6560 boards are garbage.

    Why do you need mach3 for 1 axis?. An arduino nano running GRBL will be able to coordinate up to 3 axes over the usb or serial...
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