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I recently purchased an old small drill press. It hosts a retasked old washing machine motor as the power source. Only problem is that the wiring was snafu, and I could use some help with that.
This is a FSP motor, 115 volt 1725 rpm, 1/3 horsepower.
The motor input wiring are to a set of 5 numbered and color coded spade lugs on a black bakelite pod. The terminals are 1 - red, 2 - red, 4 - blue, 5 - white, and 6 - black. There is no terminal 3 that I can find. The bakelite pod is screwed into the motor and has a switch arm out the bottom in contact with a normal centrifugal switch mounted on the motor shaft. There are only 3 motor wires, black, yellow and blue, and they appear to be associated with the terminals as blue motor wire (4), black motor wire (6) and yellow motor wire (5).
With the switch in the static (low rpm) position, there is only continuity between terminals (4) and (5), and the resistance is 2 ohms.
With the switch in the running (high rpm) position, there is continuity between (4) and (5) at 2.5 ohms now, and also between (4) and (6) also 2.5 ohms, between (5) and (6) at 0.7 ohms, and between (1) and (2) at 0.9 ohms.
When I apply 110 volt power to terminals (4) and (5), the motor runs. What bothers me is that I guess that a run capacitor should be present, but across which terminals is the question. Also, I am troubled by the second apparent circuit energized by the centrifugal switch. If the primary were only a start circuit, it should disable when the centrifugal switch closes, but it does not. I do not think I want a high torque drill press motor so if there really are two parallel sets of windings in this motor, I don't think I want both. However, as comments in other threads seemed to indicate, they thought the second circuit was used at low speed for additional torque, which does not jive at all with the circuit readings above. This seems to energize the second circuit at high speed.
Can anyone give more than a guess as to where a run capacitor should be installed and what the function of the second apparent motor circuit enabled by the centrifugal switch might be? My gut says put the capacitor between terminals (1) and (2) and to externally jumper terminals (4) and (6) together (i.e. put power across both (4) and (5) and (6) and (5)), but I am leery to try this for fear of fireworks and a burnt up motor.
Thanks!
This is a FSP motor, 115 volt 1725 rpm, 1/3 horsepower.
The motor input wiring are to a set of 5 numbered and color coded spade lugs on a black bakelite pod. The terminals are 1 - red, 2 - red, 4 - blue, 5 - white, and 6 - black. There is no terminal 3 that I can find. The bakelite pod is screwed into the motor and has a switch arm out the bottom in contact with a normal centrifugal switch mounted on the motor shaft. There are only 3 motor wires, black, yellow and blue, and they appear to be associated with the terminals as blue motor wire (4), black motor wire (6) and yellow motor wire (5).
With the switch in the static (low rpm) position, there is only continuity between terminals (4) and (5), and the resistance is 2 ohms.
With the switch in the running (high rpm) position, there is continuity between (4) and (5) at 2.5 ohms now, and also between (4) and (6) also 2.5 ohms, between (5) and (6) at 0.7 ohms, and between (1) and (2) at 0.9 ohms.
When I apply 110 volt power to terminals (4) and (5), the motor runs. What bothers me is that I guess that a run capacitor should be present, but across which terminals is the question. Also, I am troubled by the second apparent circuit energized by the centrifugal switch. If the primary were only a start circuit, it should disable when the centrifugal switch closes, but it does not. I do not think I want a high torque drill press motor so if there really are two parallel sets of windings in this motor, I don't think I want both. However, as comments in other threads seemed to indicate, they thought the second circuit was used at low speed for additional torque, which does not jive at all with the circuit readings above. This seems to energize the second circuit at high speed.
Can anyone give more than a guess as to where a run capacitor should be installed and what the function of the second apparent motor circuit enabled by the centrifugal switch might be? My gut says put the capacitor between terminals (1) and (2) and to externally jumper terminals (4) and (6) together (i.e. put power across both (4) and (5) and (6) and (5)), but I am leery to try this for fear of fireworks and a burnt up motor.
Thanks!