Sorry Irving, I had no idea that you had an accident, very sorry to hear of it.

It may be worth a look in the Hafle direction, they have a good range of gear and some good drawings. Best of luck with the project and the workshop once you get to that.

All the best

Suesi


Quote Originally Posted by irving2008 View Post
actually the obstacle detect is the easy bit... just need to monitor the current draw by the motor over a few open/close cycles to learn the profile... any deviation from that is a 'stop & back off, wait, try again' cycle (exactly how my lift doors do it).

The harder bit is working out the actual mechanism. Standard units don't use ballscrews, just a motor and gearbox turning a shaft and an articulating (low torque/more complex engineering) or sliding (simpler, but higher torque and higher maintenance/wear) arm.