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IndustryArena Forum > CNC Electronics > Leadshine > Leadshine MX4660: How does a pair of digitial outputs work?
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  1. #25
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    Dec 2009
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    137

    Re: Leadshine MX4660: How does a pair of digitial outputs work?

    Hi John, Pretty much. I have been researching big time. Here is one site will question and answers are found Endurance lasers. We produce and sell powerful and efficient diode lasers (solid state). Useful attachment to any 3D printer or CNC machine. And I also found this site. Endurance lasers. We produce and sell powerful and efficient diode lasers (solid state). Useful attachment to any 3D printer or CNC machine. This site describes using a "controller" much like you described. I also found out the 5dcv for the TTL+ can also be 12dcv. The 12DCV 5A powers the fans and laser. The TTL+ can be connected to the PWM output and attach that to the TTL+ line for intensity control. It described has being the spindle. Hopefully, the power supply will be here soon and I can try it out. Thank you for your help and interest.
    Dave

  2. #26
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    Mar 2007
    Posts
    2017

    Re: Leadshine MX4660: How does a pair of digitial outputs work?

    I have had a look at the web links

    taken from the 1st link

    Click image for larger version. 

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    it looks like the Arduino Nano PWM output goes to an interface to drive a single NPN transistor TTL interface
    or 3 paralleled NPN transistors to control a Laser with just the 2 power connections

    given the option I would use TTL output to control a 3 wire Laser

    Click image for larger version. 

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    I'm not sure how well it will work as I would not expect the 3 individual paralleled transistors to equally share the Laser current
    I would of expected each transistor to have a low value resistor in series with the emitter

    {Note - the darling transistors inside a ULN 200x or ULN280x are closely matched & can be paralleled as specified in the data sheet }

    also the 10K potentiometer wiring looks odd

    Click image for larger version. 

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    from the second link
    this circuit using a FET looks easier to construct

    Click image for larger version. 

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    John

  3. #27
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    Sep 2016
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    9

    Re: Leadshine MX4660: How does a pair of digitial outputs work?

    Hi did you ever get the laswer to turn on and off with the MX4660; I'm in the same boat and info seems to be sparce

  4. #28
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    Dec 2009
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    137

    Re: Leadshine MX4660: How does a pair of digitial outputs work?

    No. It is almost impossible to do without disabling, aka using the spindle PWM circuit. The MX 4660 doesn't support two independent PWM circuits. The TTL+ line, however, can be easily managed using the 3rd port on the ESS with the M7/M9 commands. Ultimately, the TTL+ circuit proved to be defective as it it would not turn off. +5vdc or 0vdc made no difference. If connected, it would turn on the laser. I returned the laser to Endurance and now trying to get my money refunded.

    The idea was to use the spindle and laser together. User laser to engrave some test or objects and the spindle to cut them out. Doing a major machine restructure on every project just wasn't acceptable.

    Dave

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