HiTech svo reverse
09-16-2003, 11:27 PM
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HiTech svo reverse
Hi, I have electric mains that are working opposite of each other, one up, the other down. I use a Fut 6XAS and cannot mix it away. The servo's are HiTech HS75BB retracts, what wires would I switch internally to get an opposite rotation? The gear are from Excalibur model products, a dear friend who is no longer with us, but I do want to use his retracts, thanks.
09-17-2003, 09:16 AM
#2
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RE: HiTech svo reverse
I believe you simply reverse the wires on the servo motor.
I would contact Hitec, they'll be offer to exacting knoweledge. The link below is for the Hitec Support Forum here at RCU
http://www.rcuniverse.com/forum/Hite...umid_53/tt.htm
I would contact Hitec, they'll be offer to exacting knoweledge. The link below is for the Hitec Support Forum here at RCU
http://www.rcuniverse.com/forum/Hite...umid_53/tt.htm
09-17-2003, 11:48 AM
#3
RE: HiTech svo reverse
Sorry to contradict Mglavin.
You MUST reverse the wires on the POT and the MOTOR. If you only reverse the wires on the motor it will smoke the servo in about 2 seconds.
On a Hitec servo there are usually 2 wires on the MOTOR. Reverse these.
There are 3 wires on the POT. Reverse the 2 OUTSIDE wires on the pot. Don't touch the CENTER wire on the POT.
I've done this before to avoid using a servo reverser on dual elevator setup. Works perfectly.
The reason why you can't simply reverse the wires on the motor is because:
The pot and the motor work together. As the motor turns in a certain direction- dependant on your stick inputs from the TX--the pot registers how far the motor has traveled and then the pot delivers the required power to achieve the desired amount of rotation.
If you were to reverse the wires on the motor and not the pot, they would be trying to work in opposite directions. The pot would be trying to send power to the motor in order to make it move, say, clockwise. But the motor would actually be moving counterclockwise. The pot continues to push power to the motor to make it move clockwise and all the while the motor is staining to rotate the other direction. It takes about 2 seconds for things to reach critical heat levels and your servo goes up in smoke. Don't ask how I learned this.
Oh, what the hell, I can admit it. I learned it the hard way.
You MUST reverse the wires on the POT and the MOTOR. If you only reverse the wires on the motor it will smoke the servo in about 2 seconds.
On a Hitec servo there are usually 2 wires on the MOTOR. Reverse these.
There are 3 wires on the POT. Reverse the 2 OUTSIDE wires on the pot. Don't touch the CENTER wire on the POT.
I've done this before to avoid using a servo reverser on dual elevator setup. Works perfectly.
The reason why you can't simply reverse the wires on the motor is because:
The pot and the motor work together. As the motor turns in a certain direction- dependant on your stick inputs from the TX--the pot registers how far the motor has traveled and then the pot delivers the required power to achieve the desired amount of rotation.
If you were to reverse the wires on the motor and not the pot, they would be trying to work in opposite directions. The pot would be trying to send power to the motor in order to make it move, say, clockwise. But the motor would actually be moving counterclockwise. The pot continues to push power to the motor to make it move clockwise and all the while the motor is staining to rotate the other direction. It takes about 2 seconds for things to reach critical heat levels and your servo goes up in smoke. Don't ask how I learned this.
Oh, what the hell, I can admit it. I learned it the hard way.
09-17-2003, 12:15 PM
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RE: HiTech svo reverse
thank you gentlemen, after I posted last night I laid in bed thinking what the hey, I think they worked normally when I bought the plane! I used to have a set of Likes Line retracts thad had a common switch that worked great, just one push and it all worked. I called Likes but got no answer. I'm recently moved from WA and might have misplaced a switch he had on the harness, maybe. Thanks Rcpilet for the excellent directions, I kept thinking of that Mel Gibson flick, do I cut the BLUE or the RED!!!!!!!! Boom! I will see if the mechanics of the retract will allow for the arm to move in the other direction and make the mod.
