- September 29, 2016 at 9:53 am #18717
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?September 29, 2016 at 9:55 am #18718
Best one I have seen, Super PID, http://www.vhipe.com/product-private/SuperPID-Home.htmSeptember 29, 2016 at 9:58 am #18719
Ouch… $155 lol but I guess it gives you the whole meal deal.September 29, 2016 at 10:30 am #18721
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.September 29, 2016 at 12:04 pm #18724
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.September 29, 2016 at 12:12 pm #18726
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.September 29, 2016 at 12:34 pm #18727
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.September 29, 2016 at 12:54 pm #18728
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.September 29, 2016 at 12:58 pm #18729
For the DIY crowd, some of the best write-ups I’ve found on a closed-loop motor controller circuit linked here:
Definitely something I want to try too, if I ever find the time:(September 29, 2016 at 1:02 pm #18731
Nice find Leo! Looks like I have homework tonight, that is some dense reading.September 29, 2016 at 1:29 pm #18734
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.September 30, 2016 at 2:37 pm #18776
Do we need to do a group buy?September 30, 2016 at 5:33 pm #18792
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.
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