Hi,
I recently upgraded my cnc. I put in the new PCB with the bit runner connection. I also put on the pwncnc dustboot v3. While initializing my machine, I get a nasty clicking sound followed by a grbl 9 error.
I can’t upload my video, but based on the pictures, do you think it’s my y axis home switch?
How do I fix this?
Is the Y proximity switch light up red? It’s hard to tell in the photo. Your screen grab shows it actuated so the red light should be on. If the red light is not I would think the switch is bad. When the switches have the red light on them they should show up in blue as yours shows on screen. My 5 Pro did the same thing on initialization, the switch was bad. Swapped the switch and all was good.
You can down power the machine, slowly move the X/Y axis to the mid point, power up the machine - do not initialize and then check the switches and see if they actuate correctly.
Power down and slowly/gently move the machine to the middle of motion for each axis.
Power up and go to Settings | Debug — is the Y-axis homing switch still stuck on?
Yes, they all turn red when I put a wrench near them.
I was able to fix it. The homing switch was too far away from the x axis rail to have it pick it up.
Thanks!
An SO3 was a couple of things that can go wrong. The initialization starts with the Z going up and hitting the switch/sensor. Then if that passes the router heads for the right rear corner. X or Y can home first depending on where it started from.
First see if your switches need adjusting. Manually move to the right rear corner and see if the switches turn red. As @WillAdams suggested power up and connect but do not initialize. You can see the switch condition in the debug mode.
The second thing on an SO3 can be one of your stepper motor pulleys are loose. There are two set screws and one should be over a flat on the stepper motor. Most people put a line across the center of the pulley and stepper motor shaft to they can visually see in the future if a pulley is loose.
The third thing is the eccentrics may need adjusted. The top eccentrics are fixed and the lower ones are the ones that need to be adjusted. Clean the rollers first with a nylon brush. Then loosen the bolt flightly and turn the eccentric until the wheel is snug and not overly tight. Then hold your wrench in place and tighten the bolt. If you dont hold the eccentric nut in place the torque of tightening the bolt will cause you be out of adjustment.
When done with checking your switches, pulleys and eccentrics power off and slowly move your gantry front to back slowly. If you go to fast it sounds like the belts are slipping. Then move the Z left and right all the way slowly as well. If you find any tight spots adress that. Then after all that try to power on, connect and initialize.
You can check your belts but they seldom are the problem. You sometimes get stripped teeth but not likely. Lift the belt in the middle with the gantry all the way back or front and see if both sides feel the same. Same for the belt on top of the gantry. Put the Z left or right and lift in the center and visually inspect the belt. I dont recommend taking the belt off unless you are going to replace it.
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