1. The LCD turns on and always displays "Forward" and "Stop". I can’t get it to turn the spindle on. Hitting the Start button seems to do nothing.
2. The elevation motor begins spinning as soon as I turn the machine on. Since I’m doing a CNC conversion I don’t need it, but it does seem strange that the motor (which is wired up but sitting beside the machine) wants to turn for no apparent reason. If I hit the "up" button the motor will stop until I release the button.
Reading a manual for a similar SX4 clone, it says that you can’t mill while the elevation motor is moving, so maybe the spindle won’t turn on for this reason. Looking at the wiring schematic, I don’t see how it *wouldn’t* do this. If you follow the path of the electricity, it feeds right to the blue wire of the motor even if no buttons are pressed.
Here’s the schematic:
When you look at the part of the schematic with the Up/Down buttons, keep in mind that the top 2 terminals of the switch are not connected to each other when the button isn’t pressed. The bottom 2 terminals are connected. When you press the button, this behavior reverses, with the top 2 becoming connected to each other and the bottom 2 becoming disconnected.
Here’s the button:
And here’s the LCD:
Thanks for any suggestions.