eagle1109
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Hello,
I have a coffee grinder, works on 220V, stopped working. I opened the case and started inspecting any possible problem.
The HOT line is going through couple limit switches: one at bean hopper lid and one at coffee container for safety that the machine has the hopper and container in place.
So the 220V is there all the way to the motor 1st brush.
The neutral line on the other hand is controlled by a triac which receives the pulse from pic12f508.
There are two problems I encountered:
1. There a 3rd limit switch, which is activated by a button to start grinding. When there's power, the switch has 5V, so when I press, it should pass the 5V from 1st pin to 2nd pin. But the 5V isn't passed even I tested the switch with continuity when the machine is off, when I press the switch, there's a contact. But when power is on, when I press the 5V isn't passed!
2. The triac BT134 has 9V on its gate, but the motor won't start. Does the triac works with 0V?
I have a coffee grinder, works on 220V, stopped working. I opened the case and started inspecting any possible problem.
The HOT line is going through couple limit switches: one at bean hopper lid and one at coffee container for safety that the machine has the hopper and container in place.
So the 220V is there all the way to the motor 1st brush.
The neutral line on the other hand is controlled by a triac which receives the pulse from pic12f508.
There are two problems I encountered:
1. There a 3rd limit switch, which is activated by a button to start grinding. When there's power, the switch has 5V, so when I press, it should pass the 5V from 1st pin to 2nd pin. But the 5V isn't passed even I tested the switch with continuity when the machine is off, when I press the switch, there's a contact. But when power is on, when I press the 5V isn't passed!
2. The triac BT134 has 9V on its gate, but the motor won't start. Does the triac works with 0V?