PWM Device for Router (not spindle)

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This topic contains 14 replies, has 3 voices, and was last updated by  Ryan 3 months, 3 weeks ago.

Viewing 15 posts - 1 through 15 (of 15 total)
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  • #18717

    Jason
    Participant

    Is there such a device that we could control the speed of say a DW660 with the either the 12v or 5v pwm signal? Kinda like a SSR but viable input/output?

    #18718

    Ryan
    Keymaster
    #18719

    Jason
    Participant

    Ouch… $155 lol but I guess it gives you the whole meal deal.

    #18721

    Ryan
    Keymaster

    It does look like the complete plug and play solution.

    I just can’t help but think I could make less bells and whistles version. Maybe a arduino micro $4, some ir optical sensors $7/10, and a zero point ssr $??30?. This kind of stuff is not my strong point and I could never sell them because I don’t want to get anyone zapped, but once its all wired up the programming is simple. I almost bought some parts yesterday to try it. There is a part on tindie that is close to the zero point ssr, but not close enough. I’m not positive it is the right way to do it though.

    Having a speed controller is cool, but the PID is what brings this way over the top, it would really make any “spindle” a much better cutter. Although if you get one of the actual spindles with a VFD adding PID would be simple with an optical IR rpm sensor.

    #18724

    Jason
    Participant

    Does spindle control in grbl allow rpm control or just on off and you control rpm with the dial that most of the Chinese ones come with..

    I ordered up an UNO and cnc shield as I would like to be able to do the laser shading of 3d reliefs. I will never use this as a printer.

    #18726

    Ryan
    Keymaster

    I am not positive, but yes if it is using a VFD not just a regular power supply, I do believe the knob can be replaced with a pwm signal. If that is true then it’s easy. I do not have one to test with though, I just believe a VFD gets rid of the need for a zero point cross detecting ssr.

    #18727

    Jason
    Participant

    Think I might order up a spindle to try out.. A. because they are supposed to be quieter and it is in my house so that might be important and B. would be cool to have complete control via the interface.

    #18728

    Ryan
    Keymaster

    Wow, before you spend that kind money. You should double check my hunch, I’m sure someone has tried it. I’ right in the middle of a project right now and can’t verify.

    I would hate to have you waste money on a hunch.

    #18729

    Leo69
    Participant

    For the DIY crowd, some of the best write-ups I’ve found on a closed-loop motor controller circuit linked here:

    https://sites.google.com/site/klaasdc/cnc-router/spindle-controller

    https://hackaday.io/project/2229/logs

    Definitely something I want to try too, if I ever find the time:(

    #18731

    Ryan
    Keymaster

    Nice find Leo! Looks like I have homework tonight, that is some dense reading.

    #18734

    Leo69
    Participant

    Chinese board houses will deliver 10 silk screened prototype boards for $20 shipped these days and the hackaday write-up has a GitHub link with schematics, BOM, and board layouts so there’s very little left to do here. They did a really nice job on this. I may put an order in soon, it’ll take the boards 3 weeks to get here which should give me some time to wrap-up some home improvement projects I’ve been working on.

    #18776

    Ryan
    Keymaster

    Do we need to do a group buy?

    #18792

    Leo69
    Participant

    Personally, I think I’d replace the Arduino Demi board with a pro mini or something else smaller and cheaper. Does anyone here have experience with SUPER PID or similar? Just wondering if it’s a marginal improvement or not to decide if this is worth the effort.

    #34789

    Ryan
    Keymaster

    Anybody have some thoughts.

    This to control the router, https://www.tindie.com/products/thewp122/ac-60hz50hz-dimmerssr-controller-board/,

    Then add a little arduino and an optical sensor for the actual speed and PID? So speed signal from the ramps to the little arduino from the little arduino to the tindie box tindie box to the router?

    I can’t believe a $20 solution is not available yet, and why didn’t I take more EE classes?

    #34790

    Ryan
    Keymaster
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