I was trying to find the location of that web app. That’s pretty cool. Seems like it should be something closer to onshape, although the fact that it’s open source is a big win.
Springs don’t apply a constant force. They apply a force proportional to the distance to their resting position. That would make them tough to use in this situation, especially if you were trying to make them push up from the carriage.
I still have hope this will go upstream, so any mpcnc tag won’t work. It seems like the flag for going past zero just needs to be split into an x, y, and z flag. Did you forget from the jeffeb3 GitHub? Can you do a pr issitting the dual endstops branch? I can review and clean it up.
Yeah, it’s a little floppy side-to-side. For a workbench, I would definitely add some corner braces. For my MPCNC and LowRider, it wasn’t bad enough to make a difference. It would wobble a little, but the work would move with the machine, so it wasn’t a big deal. Here is another video from him that shows a stiffer version:
Setting it to 213 is going to be an average of 10V, but it’s using a PWM, which will oscillate from input voltage (12V) to 0V.
It switches quickly, but if it’s advertised as 10V-0V, I wouldn’t do that.
Since there’s no current, you can use a simple resistor voltage divider. a 10kOhm and a 2kOhm would drop it, although the input voltage is rarely…[Read more]
Decent instructions. Good enthusiasm. Good MPCNC exposure.
The comments went bonkers. The guy does deserve some credit for some easy to follow instructions.
I don’t know if the little bit linking to the TV page was added later, but the community really is slaying this guy. If he would have added one sentence about how you can buy the kits from…[Read more]
With a 12V TTL , you can wire it up like in that manual (cool that it covers MPCNC).
As for where the laser gets it’s current, I’d have to see the schematic for the driver. But if it’s really just a 12V TTL, and it is also connected to a power supply, then the amount of current coming from D9 should be minimal, so you wouldn’t need more current…[Read more]
The laser gets power from the driver, which has its own power supply. That’s where the current comes from. The logic for when to turn it on and off and at what power is what you use the Arduino/Marlin for. That’s why you don’t use D8-D10. At least that’s how I’ve seen it done, and that’s what’s in the guide.
dj4linux made a MPCNC based camera track. Having it follow you wouldn’t be that great with a timelapse… I guess you could make the movements very very slow…
I’ve done some computer vision in the past, and if you had another camera that was stationary, looking for movement (image – background average image, with some smoothing in there) you…[Read more]
Hmmm. OK. I’ll have to look closer at that. That shouldn’t be happening. I don’t know what that choice in the menu does, but it’s probably just trying to home Y, and there’s something in the code that’s making it also do Z.
If you get a minute, can you try it with
G28 Yfrom the console and see if it also does the Z?
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