pic: Team 948 Shifting Transmission Version #2

[jfelser]

*bump*

Does anyone have thoughts on using a servo to drive this, without modifying the center spool to include a spring?

[camtunkpa]

Originally Posted by jfelser

*bump*

Does anyone have thoughts on using a servo to drive this, without modifying the center spool to include a spring?

I pitty the little servo about to die. All joking aside, I think you might run into problems if there is no spring in the system. Remember for a short period of time every time you shift, there will be binding while you're waiting for the balls to line up with the slots in the gear. These transmissions are more friendly than others towards their shifting actuator, but I would seriously suggest having some spring in there. The plunger shaft doesn't have to have springs on it as long as the device actuating the plunger has some sort of shock absortion either in the unit or the connecting linkages.

[jfelser]

Yeah, after thinking about it for awhile this makes a lot of sense... mainly we are trying to get rid of the pneumatics weight - but, according to my calculations, we should be able to get 28 shifts each on 2 gearboxes before we run one tank down from 120 psi to 40 psi, so we may run our bot without a compressor onboard which would make this work.