Froneck
Titanium
- Joined
- Dec 4, 2010
- Location
- McClure, PA 17059
Anyone familiar with 120VAC 2 speed (3600/1800) Motor connection? I'm trying to help someone get running a small lathe that has a 2 speed 120vac motor. The wiring diagram in the manual shows what looks like 4 coils, connected in 2 series pairs. The pair that I assume is the motor winding has a connection to the common labeled "Z" the other ends of the 2 coils in series are labeled "X1" and "V1" The other 2 coils in series is labeled "U" at the common the other ends "X2" and "V2". A capacitor is connected to "U" and nothing else. There is NO centrifugal switch that I know of! At least I'm told that no click can be heard as the motor slows to a stop. 2 switches provide Forward and Reverse depending on which is depressed, Stop resets at switches therefore Forward and Reverse switch act as On/Off too and remove all power when Up. A third larger button operates two switches for High and Low and is returned to Low when the Stop button is pushed. For High Speed operation both a directional button and large button must be pushed to lock the button down in High Speed.
The schematic is poor in that it does not show the internal connections of the switch so I have to guess at the operation. From what I'm guessing there is no phase reversal to "Z", "X1" and "V1" However "Z" and "X1" "V1" are always opposite phase but not phase switched. "X2" and "V2" reverse phase for Forward and reverse along with the connection to the other side of the Capacitor and I assume that is the start/run winding.
Checking the switch proves out the connection assumption however the Capacitor does not get connected in Forward. Possibly a missing jumper or short damaged contacts. The motor will run fine in Low Speed Reverse and seem to start and run fine in Low Speed Forward though the Cap has no connection. Problems occur in High speed.
Making a four 5watt lamp test circuit to simulate power applied to the coils with the motor disconnected from the switch. Lights lit as the should have in Low and as expected in High with no connection to "U" since the Capacitor was also removed!
To check phase reversal I disconnected "X1" and "V1" and attached them to "X2" and "V2" so that if there was a phase reversal on one the other will go out. Low Speed again responded as expected Reverse lit the lights as they should have and Forward because of the failure to connect to "C" a path was created thru 3 bulbs"X1", "X2" and "V2". However in High and especially Forward things changed. 'X1" lit as it should have and this time "X2", "V2" and "V1" should have been in series. However "X2" was about 1/2 but "V2" was almost full brilliance while "V1" was out indicating there was some path thru the low speed switch!
Each time I made a test, I got more questions than answers! OK, throw caution to the wind, wire the motor direct to the line. One phase connected to "Z" and to the Capacitor. Other phase connected to "X1" and "X2", motor ran low speed Forward, reversing Capacitor and "X2" motor ran Low speed Reverse.No connection to 'V1" or "V2" both insulated and not connected to each other. OK! Now connected "V1" and "V2" as above for High Speed "X1" and "X2" disconnected and insulated. Again all speeds the same, LOW.
Name plate Give Type as TTL, All I can find for TTL is a Motor Company in Taiwan. They do not list this type of motor. Anyone know How this motor can be wired to get High and Low speed? If I know how to wire it I can get the switch to work or modify it to get the intended operation! This is a 2 and 4 pole motor, I'm thinking I should get High speed when connected as I did. Any Ideas????
The schematic is poor in that it does not show the internal connections of the switch so I have to guess at the operation. From what I'm guessing there is no phase reversal to "Z", "X1" and "V1" However "Z" and "X1" "V1" are always opposite phase but not phase switched. "X2" and "V2" reverse phase for Forward and reverse along with the connection to the other side of the Capacitor and I assume that is the start/run winding.
Checking the switch proves out the connection assumption however the Capacitor does not get connected in Forward. Possibly a missing jumper or short damaged contacts. The motor will run fine in Low Speed Reverse and seem to start and run fine in Low Speed Forward though the Cap has no connection. Problems occur in High speed.
Making a four 5watt lamp test circuit to simulate power applied to the coils with the motor disconnected from the switch. Lights lit as the should have in Low and as expected in High with no connection to "U" since the Capacitor was also removed!
To check phase reversal I disconnected "X1" and "V1" and attached them to "X2" and "V2" so that if there was a phase reversal on one the other will go out. Low Speed again responded as expected Reverse lit the lights as they should have and Forward because of the failure to connect to "C" a path was created thru 3 bulbs"X1", "X2" and "V2". However in High and especially Forward things changed. 'X1" lit as it should have and this time "X2", "V2" and "V1" should have been in series. However "X2" was about 1/2 but "V2" was almost full brilliance while "V1" was out indicating there was some path thru the low speed switch!
Each time I made a test, I got more questions than answers! OK, throw caution to the wind, wire the motor direct to the line. One phase connected to "Z" and to the Capacitor. Other phase connected to "X1" and "X2", motor ran low speed Forward, reversing Capacitor and "X2" motor ran Low speed Reverse.No connection to 'V1" or "V2" both insulated and not connected to each other. OK! Now connected "V1" and "V2" as above for High Speed "X1" and "X2" disconnected and insulated. Again all speeds the same, LOW.
Name plate Give Type as TTL, All I can find for TTL is a Motor Company in Taiwan. They do not list this type of motor. Anyone know How this motor can be wired to get High and Low speed? If I know how to wire it I can get the switch to work or modify it to get the intended operation! This is a 2 and 4 pole motor, I'm thinking I should get High speed when connected as I did. Any Ideas????