New build w/ Centroid - just got everything running. When trying to Home the Y2- has done 1 of 2 things:
Sensed the flag and then started to move in the opposite direction racking the gantry
Kept moving towards the flag crashing into the bumper and flag
It does light up on the sensor when in proximity to the flag or with test metal, it also lights up in the control box, so it is seeing it, it just seems like it doesn’t care.
Here is my chatgbt summary from working through steps on this:
"I’m having a homing/squaring issue on my Avid CNC. During homing, the left and right Y-axis motors are not behaving correctly.
Originally, the left sensor would trigger and the right side would continue moving away instead of stopping and squaring normally.
I checked and adjusted the homing flags. At one point the right side started moving in the correct direction again, but it would continue moving and never seem to register the sensor, even though the sensor appears to be activating.
The sensors show activity in the diagnostics screen. The machine was previously working, and this behavior started after recent adjustments.
I have verified the flags are in their original positions. The gantry is mechanically free and can be moved by hand if not engaged on the rack and pinion.
I need help determining whether this is a sensor input issue, wiring issue, homing configuration issue, or a motor direction/driver issue."
Thanks for any help, I’m really in a bind as I have jobs lined up waiting for this
This sounds like correct behavior. The gantry auto squares it self and it does this by hitting both sensors, disabling one of the Y motors and then “crab walking” against the sensor to see if it’s in square.
Unless the motor rams into the end stop, what you are seeing is likely exactly how things are supposed to behave. Depending on how your machine is in square/out of square you can hear a knocking sound as this happens. All normal.
Even if your machine frame is square, that doesn’t mean you shouldn’t run this squaring routine.
PS, ChatGPT (or any other AI tool) is NOT a good source of information for something niche like these machines. I’d highly recommend staying away from it for help on things like this.
Thanks for responding. I understand that it’s trying to square, but it doesn’t stop trying to move forward. It jams itself into the rubber stop. I tried adjusting the flags and then it also jammed into that.
Ok, that sounds like it’s not functioning correctly. Go through this video:
Sounds like you have a sensor that’s not plugged in correctly. Run through that video to test all of your sensors. If they don’t work as described you’ll need to check your sensor wiring. Those Y2 sensors can easily get missed
So, I did run the tests, the Y2A lights up when it’s supposed to, but when homing, once it gets near the flag it starts going backwards to where I have to hit e-stop otherwise it racks the gantry.
The motors move together when jogging, I’ve had no binding. It just happens when homing
