Hobby level CNC machines are fun to use and are a great tool to make your projects with. So how does a CNC newb get started? Our opinion is that it’s best to jump right in and get doing. [WTH] wanted to learn more about CNC machines and decided to build his own using parts that were kicking around his house.
As you can see, the frame is made from PVC pipe. In addition, the linear rails are also PVC and the linear bearings….. larger diameter PVC. Scavenged stepper motors and threaded rod are responsible for moving the X and Y axes. Electronics-wise, an Arduino Uno running GRBL and a Protoneer CNC Shield outfitted with StepSticks drive the motors. Here’s a test drawing completed by the machine:
Admittedly, this CNC machine won’t be milling out steel parts any time soon but that is not the point. [WTF] has learned the mechanics, electronics and software associated with CNC machines and that was the point of the project. We are looking forward to seeing how his next machine comes out.
This isn’t the first PVC CNC machine we’ve seen on Hackaday, check out this unorthodox one.
Excellent work. But is it closed loop? Does it sense the end effector position to compensate for any non-linearity/offset?
It is closed loop. In addition, the GCODESENDER (f-engrave, too, I think) SW reports current machine position on the PC screen. The shield also has header pins to provide shutdown if X, Y, or Z axis trips a limit switch.
Is it really? It looks like the traditional open-loop steppers with no feedback. If there is no feedback on position, it can’t be closed loop.
Ahhhh, you are correct. If a stepper ‘stalls’ the control boards do no know it. Good point.
Plotter!
Very classy hack! Not a single part being used for its intended purpose. (I’m guessing somebody got a home depot gift card for their birthday.)
Hmm, the stepper motors, drivers and all the fasteners are doing their intended job. No?
The first time you typed [WTH] the second time [WTF] Wich one is it?
It usually starts with [WTH], then as the day goes on and stress mounts it progresses to [WTF[, then [WTMF], then [FI] as one throws the whole thing in the bin.
(c:
You made my day sir.
[WTH] His website is WhiskeyTangoHotel