DEGWS Posted February 8, 2020 Author Report Posted February 8, 2020 Actuator is installed again and working like new :-) 3
JT Posted February 9, 2020 Report Posted February 9, 2020 That's fantastic, congrats!!!! Happy flying Germany!
carusoam Posted February 9, 2020 Report Posted February 9, 2020 Great follow up, Degws! Best regards, -a-
Echo Posted September 2 Report Posted September 2 Reviving an old thread. I have a damaged Dukes actuator. The drive gear is separated from the motor. A&P has the worm screw section. I believe the motor is serviceable, but it needs removed from the broken casting. Anyone know procedure?
Echo Posted September 2 Report Posted September 2 3 hours ago, PT20J said: I would contact Don Maxwell. Yes, of course that is an option, but thought there would perhaps be a member that has completed the disassembly or had a schematic of the motor.
Echo Posted September 3 Report Posted September 3 Don had me send a couple pics. A tiny screw was holding it on. Job done. Thanks Don! 1
EricJ Posted September 3 Report Posted September 3 2 hours ago, Echo said: Is green or black positive on motor? It switches depending on whether it is driving the gear up or down. Wire per the diagram for the airplane to the appropriate relays. If it goes the wrong way, switch them. 2
Echo Posted September 4 Report Posted September 4 1 hour ago, EricJ said: It switches depending on whether it is driving the gear up or down. Wire per the diagram for the airplane to the appropriate relays. If it goes the wrong way, switch them. I am NOT installing. It is a potential spare. All I want is what color of the four wires is positive and what is negative...
Echo Posted September 4 Report Posted September 4 If no one knows...that is fine. I will dig out the schematic and identify it myself. Just thought someone might be able to help.
EricJ Posted September 4 Report Posted September 4 1 hour ago, Echo said: If no one knows...that is fine. I will dig out the schematic and identify it myself. Just thought someone might be able to help. The positive wire is relative to which way you want it to turn. If you want it to go one way, green is +, if you want it to go the other way, black is +. 2 1
Echo Posted September 4 Report Posted September 4 25 minutes ago, EricJ said: The positive wire is relative to which way you want it to turn. If you want it to go one way, green is +, if you want it to go the other way, black is +. Or is red and green positive and black wire is negative? Black is usually negative in car batteries.
EricJ Posted September 4 Report Posted September 4 10 hours ago, Echo said: Or is red and green positive and black wire is negative? Black is usually negative in car batteries. It depends on which way you want the motor to turn.
201Steve Posted September 5 Report Posted September 5 11 hours ago, EricJ said: It depends on which way you want the motor to turn lol I don’t think he’s listening. Maybe if you say it a third time. 1 1
PT20J Posted September 5 Report Posted September 5 I think Eric’s point is that on a DC motor, there is no “positive” or “negative” wire. If you connect one wire to the positive terminal of a battery and the other to the negative terminal, the motor rotates in one direction. If you reverse the connections, it rotates in the other direction. If you just want to test the motor, try it and see for yourself. 2
Echo Posted September 5 Report Posted September 5 10 hours ago, PT20J said: I think Eric’s point is that on a DC motor, there is no “positive” or “negative” wire. If you connect one wire to the positive terminal of a battery and the other to the negative terminal, the motor rotates in one direction. If you reverse the connections, it rotates in the other direction. If you just want to test the motor, try it and see for yourself. Is that the point? There are four wires with different colors coming out of the motor. For someone that works with these motors it may be simple simon, but not for someone that does not work with motors and simply connects a black to negative and a red to positive when dealing with batteries. If that was his point it was poorly made. You provided simple clarity. Thank you for that. Using knowledge as power versus educating for the good of members...one way to go. You go Steve.
EricJ Posted September 5 Report Posted September 5 45 minutes ago, Echo said: Is that the point? There are four wires with different colors coming out of the motor. For someone that works with these motors it may be simple simon, but not for someone that does not work with motors and simply connects a black to negative and a red to positive when dealing with batteries. If that was his point it was poorly made. You provided simple clarity. Thank you for that. Using knowledge as power versus educating for the good of members...one way to go. You go Steve. An electric motor is just coils. Coils don't have polarity, just like resistors. These motors are made to switch direction, so the case isn't grounded through one of the wires. On the schematic for my airplane the motor is shown with two wires, and they are lablled 'grey' and 'red'. They connect to the electrical system through relays which switch the polarity based on the gear selector position. So there wasn't a straightforward answer to the question you asked, and I was trying to give you the best, shortest answer that was relevant and would also highlight that (as both an A&P and an EE). Exchanging information productively and reliably requires effort and attention from both sides. Antagonizing those that can help you and that tried to help you is ultimately not in your interest. 4
PT20J Posted September 5 Report Posted September 5 1 hour ago, Echo said: There are four wires with different colors coming out of the motor. I don't have schematics for a M20E, but I looked at the schematics for the 1977 M20J that also used the Dukes and the motor shows only two wires, a red and a black. I don't know what the other two wires would be for unless yours has separate wires for the armature and the field windings. 1
Echo Posted September 6 Report Posted September 6 13 hours ago, EricJ said: An electric motor is just coils. Coils don't have polarity, just like resistors. These motors are made to switch direction, so the case isn't grounded through one of the wires. On the schematic for my airplane the motor is shown with two wires, and they are lablled 'grey' and 'red'. They connect to the electrical system through relays which switch the polarity based on the gear selector position. So there wasn't a straightforward answer to the question you asked, and I was trying to give you the best, shortest answer that was relevant and would also highlight that (as both an A&P and an EE). Exchanging information productively and reliably requires effort and attention from both sides. Antagonizing those that can help you and that tried to help you is ultimately not in your interest. Fair enough. Just frustrated. Sorry Eric 2
201Steve Posted September 6 Report Posted September 6 @Echo I have been known to poke fun at misunderstandings and otherwise inappropriate circumstances , including my own. I’m just another bozo on the bus just trying not to take life too seriously. my 77J dukes is also a 2 wire motor. 1
PT20J Posted September 6 Report Posted September 6 There is a M20C, E, F, G Service and Maintenance Manual in the downloads section of this site that has schematics. Apparently the older motors have separate field and armature connections. The wire colors are shown in the diagram.
Echo Posted September 6 Report Posted September 6 50 minutes ago, 201Steve said: @Echo I have been known to poke fun at misunderstandings and otherwise inappropriate circumstances , including my own. I’m just another bozo on the bus just trying not to take life too seriously. my 77J dukes is also a 2 wire motor. I am just a bozo with an apparently weird four wire motor. Lol
Echo Posted September 6 Report Posted September 6 22 minutes ago, PT20J said: There is a M20C, E, F, G Service and Maintenance Manual in the downloads section of this site that has schematics. Apparently the older motors have separate field and armature connections. The wire colors are shown in the diagram. OK I will look at what four wires do unless they are as stated for separate field and armature connections which I don’t understand. If it were you and you wanted to test what wire would you connect to positive and negative?
PT20J Posted September 6 Report Posted September 6 47 minutes ago, Echo said: If it were you and you wanted to test what wire would you connect to positive and negative? I would look at the schematic to see how it the field and armature leads are connected through the relays and connect it like that.
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