Dave Richards
06-29-2004, 11:22 PM
A friend of mine asked me to look at his tablesaw to see why it won’t run. It’s a Jet cabinet saw wired for 220V. He thought it was the switch so he bought a new one from Jet and installed it matching the locations of the wires. It still doesn’t run.
I poked around this evening and discovered that if I push the relay in manually—with a stick—the saw will run just fine. Based on that, I rule out power supply and motor. Pressing the ON switch doesn’t do anything. It appears that the relay coil is not being energized.
The momentary contact switch that is depressed via the green button appears to be good. I get continuity through the switch when the button is pressed.
The lower section of the assembly—the stop portion has me a little stumped. There is a small wheel that appears to set a tripping current level for a breaker. Below that is a small plastic knob which has settings marked Test, Manual and Auto. It seems that this must break the circuit to the coil when the red button is pressed. What I can’t tell is which position it should be in for normal operation. The new switch came with that dial in the Test position which is adding to my confusion.
Anyone have any thoughts? There’s little in the way of information included with the switch. The wiring schematic is almost impossible to read. I’ll look closer when I can get to work where I have a lighted magnifier.
I don’t want to have to stand there with a stick holding the relay in so he can use his saw. Help? Anyone ever seen this before?
Thanks.
Dave
I poked around this evening and discovered that if I push the relay in manually—with a stick—the saw will run just fine. Based on that, I rule out power supply and motor. Pressing the ON switch doesn’t do anything. It appears that the relay coil is not being energized.
The momentary contact switch that is depressed via the green button appears to be good. I get continuity through the switch when the button is pressed.
The lower section of the assembly—the stop portion has me a little stumped. There is a small wheel that appears to set a tripping current level for a breaker. Below that is a small plastic knob which has settings marked Test, Manual and Auto. It seems that this must break the circuit to the coil when the red button is pressed. What I can’t tell is which position it should be in for normal operation. The new switch came with that dial in the Test position which is adding to my confusion.
Anyone have any thoughts? There’s little in the way of information included with the switch. The wiring schematic is almost impossible to read. I’ll look closer when I can get to work where I have a lighted magnifier.
I don’t want to have to stand there with a stick holding the relay in so he can use his saw. Help? Anyone ever seen this before?
Thanks.
Dave