Search found 13 matches

by Bluemetal
Sun Nov 15, 2015 2:10 pm
Forum: Discussion
Topic: SO3: Built a probe...got errors
Replies: 17
Views: 3152

Re: SO3: Built a probe...got errors

It looks like there's nothing for me to do, then. :) A flaky power supply can cause false triggering of inputs. Thank you very much for the help. Sometimes a simple question can set someone on the right path. You did much more than that. You mention a 5 V power supply. If you're using the barrel-pl...
by Bluemetal
Sat Nov 14, 2015 12:57 am
Forum: Discussion
Topic: SO3: Built a probe...got errors
Replies: 17
Views: 3152

Re: SO3: Built a probe...got errors

Flip them; the spindle is a great antenna for all sort of noise. Have that connected to ground, and A5 to the touchplate. Done that and produced the same problem. That is alarming. Try with A5 connected to IOREF (or +5V). If that still doesn't move, there's a bigger problem (busted AtMega328P chip ...
by Bluemetal
Fri Nov 13, 2015 10:22 pm
Forum: Discussion
Topic: SO3: Built a probe...got errors
Replies: 17
Views: 3152

Re: SO3: Built a probe...got errors

This sounds like a false triggering of the probe. You would not see that on the multimeter, because it's probably a brief pulse, or noise that averages to whatever you're measuring. A bunch of questions for you: How did you wire the probe? Do you have any filtering or buffering, or a pull-up resist...
by Bluemetal
Fri Nov 13, 2015 2:06 am
Forum: Discussion
Topic: SO3: Built a probe...got errors
Replies: 17
Views: 3152

Re: SO3: Built a probe...got errors

Just upgraded to 0.9j GRBL to use probing (A5 high + ground) and I am seeing something weird. Everything else works just fine with the Shapeoko but it will not respond properly to the G38.2 Gcode. The z-axis shutters and barely moves. G38.2 Z-26 F100 < [PRB:0.000,0.000,-28.360:1] ok G38.2 Z-26 F100 ...
by Bluemetal
Sun Sep 15, 2013 2:18 pm
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Defective GBRLshield

It turns out the GBRLshield (V3) that came with the kit had some fault in it (not fatal so it would still run, but serious enough to prevent it from performing correctly). Replacing it with a new GBRLshield V4 and using the same exact settings as the previous one and same gcode, worked instantly (no...
by Bluemetal
Sun Sep 08, 2013 8:35 pm
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Re: Help me identify the problem!

Another thing to check is the motor power supply. It might be giving up for some reason. I have checked all the voltages and 0.7V seems to be the sweet spot for X and Y (nema 23). Z on the other hand is having some issues. I set Vref to 1.5V after trying many different ones. It is very clear to see...
by Bluemetal
Sat Sep 07, 2013 3:12 pm
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Re: Help me identify the problem!

Is it always the same axis? Make sure the power cable to the spindle is far away from the USB and Motor cables. It is usually the X-axis given that it is the one doing most of the movement, but on occasion it happens on the Z-axis ( the second one doing most of the work). The Y axis moves most on t...
by Bluemetal
Sat Sep 07, 2013 1:58 am
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Re: Help me identify the problem!

In that case, I'd point a fan for some active cooling at your stepper drivers --- my machine wouldn't work past the first few steps until I placed a 24v fan over the stepper drivers. William There is clearly a relationship between the failure and the current settings, but I believe the solution may...
by Bluemetal
Fri Sep 06, 2013 3:08 pm
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Re: Help me identify the problem!

It sounds to me like the motor is skipping. Either it needs more current by adjusting the current limit on the motor drivers or it is binding and can't move for some reason. Can it be moved by hand after it does this? The belts are tight and everything moves smoothly and firmly when power is cut of...
by Bluemetal
Fri Sep 06, 2013 3:25 am
Forum: Assembly
Topic: Help me identify the problem! [Solved :Defective GBRLshield]
Replies: 12
Views: 2411

Help me identify the problem! [Solved :Defective GBRLshield]

I am starting to get Shapeoko #8 (initial Kickstarter group) with GRBL shield to work (after a long pause) and learning by trial and error. It has been able to write its name on previous tests. Being English a second language, I could not find anything that resemble this behavior in the forum, so he...