BaronJ
Grumpy Old Git.
Hi Guys,
I started talking about making a tool grinder in another thread so I thought it would be better to start a new one rather than clutter up someone else's.
I have been collecting various bits and pieces for a while now. But the other day I got to weld the motor mounting plate to the base plate.
Because the motor is a salvaged 1200 watt universal motor from an old rotary lawn mower and runs at a terrific speed I need to slow it down somewhat. So I've also built a triac speed controller that I can use to vary the speed from a standstill to the maximum rpm.
The abrasive disc that I have acquired is rated at 5200 rpm so running it beyond that speed would be dangerous.
The photos show the various bits that I have completed so far. The motor mounting plate is 6 mm steel plate. I used a standard IEC socket and illuminated switch to supply power to the controller and then the motor. A PCB was made to fit in the plastic box bottom with the triac and its heatsink attached by screws. The speed control potentiometer is fastened through the PCB and box. Its mounting shaft and nut used to fasten the PCB to the bottom of the box. The PCB is a single sided board with the components soldered directly to the copper.
I started talking about making a tool grinder in another thread so I thought it would be better to start a new one rather than clutter up someone else's.
I have been collecting various bits and pieces for a while now. But the other day I got to weld the motor mounting plate to the base plate.
Because the motor is a salvaged 1200 watt universal motor from an old rotary lawn mower and runs at a terrific speed I need to slow it down somewhat. So I've also built a triac speed controller that I can use to vary the speed from a standstill to the maximum rpm.
The abrasive disc that I have acquired is rated at 5200 rpm so running it beyond that speed would be dangerous.
The photos show the various bits that I have completed so far. The motor mounting plate is 6 mm steel plate. I used a standard IEC socket and illuminated switch to supply power to the controller and then the motor. A PCB was made to fit in the plastic box bottom with the triac and its heatsink attached by screws. The speed control potentiometer is fastened through the PCB and box. Its mounting shaft and nut used to fasten the PCB to the bottom of the box. The PCB is a single sided board with the components soldered directly to the copper.