Tagged: z-axis problem
- March 17, 2017 at 5:03 pm #29716
Hi, I’ve had the cnc up for about a week – got the kits here. It seemed to work fine, but something has gone south though.
My zaxis seems to sometimes work, othertimes not. I took the stepper off and I’m just running it using manual mode in repetier. For a few minutes it will appear to work, then it starts making grinding noises, runs opposite direction, then will just stop accepting commands. I can turn it off for a while and it seems to “cool down” then I can get a few more commands in. It seems to not like the 1mm steps. (grinding sound) The 10mm steps run smoother – but sometimes in the wrong direction.
I’ve been through the basic software setup on this web site. I’ve even made some carves, but now I’m stuck on this z-axis issue.
My question is how to debug this? Is it the electronics, the software, the stepper?
X/Y seem ok.March 17, 2017 at 7:27 pm #29722
Update: I (unplugged everything) switched the Y and Z drivers. The problem seems to stay with the stepper.
Its strange, a lot of the time it works fine, but it gets into fits where it rumbles or goes the wrong way.
It sure feels like a bad connection in the wiring – the way it comes and goes. Is it possible to take the cover off the stepper and verify the connections inside?March 17, 2017 at 7:31 pm #29723
now swap the wires, does it follow the wires or the stepper.March 17, 2017 at 7:47 pm #29724
Do you mean unplug the wires from the stepper? They don’t appear to be on a connector.March 17, 2017 at 7:57 pm #29725
The wiring harness.
It can be the stepper, the harness, the driver, ramps, arduino, or control system.March 17, 2017 at 8:49 pm #29727
I took your suggestion and was going to switch out the wiring harness when I noticed the harness was slightly loose!
I had covered the joint with black electrical tape, and the entire length in PET, but it must have worked loose.
I re-did the tape and it worked great!
Is there a better way to make this connection stay together other than black tape? The connectors seem inherently loose.
Thanks for all your help.March 17, 2017 at 8:52 pm #29728
I use black tape as well. You can slide the female pins out pretty easy and give them a pinch if you think they are making poor contact.March 17, 2017 at 9:56 pm #29729
I’ve done this on RC airplanes to keep connectors together.March 20, 2017 at 11:57 am #29844
I used on my joints of wires, thermo tubes (sorry don´t know whats the name on english). Its better than Black tape.
Its like this:
March 20, 2017 at 12:04 pm #29850
- This reply was modified 3 months ago by Odacir Cristofolini.
Heat shrink tubing.March 20, 2017 at 1:00 pm #29853
I love the small zip tie idea! Thanks for the pic! I had the same issue just a slightly different problem (my wire was shorted or faulty somewhere within the sleeve ‘thanks banggood’).
NeilMarch 20, 2017 at 2:55 pm #29868
I’ve had a couple of issues with connectors not holding when shrinkwrapped… I think I’ll redo with zip ties and shrinkwrap. 😉
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