4 ms·

Automatic doors of any kind are a big hazard. I saw a Tesla SUV’s gullwing door slowly closing with a little boy playing underneath. The tip of the door was a

Automatic doors of any kind are a big hazard. I saw a Tesla SUV’s gullwing door slowly closing with a little boy playing underneath. The tip of the door was about to come down right on the child’s mushy cranium when he looked up, saw the door, and darted out of the way. (This is not satire — it actually happened.)

polishdude20 3y ago
Isn't there some mechanism to sense the torque feedback or something and stop the door closing?
- Rinzler89 3y ago
  There is, power windows in cars have had it for over 20+ years or so, for safety, so kids/dogs don't strangle themselves with the windows. It's a 1 cent shunt used for monitoring the current consumption of the motor. If the current spikes, it means something jammed it(or it reached the top/bottom) and the microcontroller will cut power to the window lifting motor. Maybe Tesla can look into that cutting edge tech once they wrap up humanoid robots.
  - slipheen 3y ago
    It seems bizarre to me that they wouldn’t have that sensor, I wonder if maybe it’s because they somehow didn’t calibrate properly for the force at the top angle? I don’t have/want to cybertruck, but I wonder if it would stop properly if you were to have something at the bottom blocking it.
    - engineer_22 3y ago
      It does have it, lots of videos of people putting their arm/hand/whatever in the cyber truck frunk to demonstrate it stops closing. If you get pinched close to the hinge your reaction won't generate a lot of torque on the motor, it will be less than the weight of the trunk itself.
    - BoorishBears 3y ago
      It's not bizarre when you realize how Tesla cuts corners under the guise of innovation. Take their power seats not stopping for obstructions: most auto manufacturers do not make their own power seat modules. They buy those from suppliers like Bosch and Continental (yes, the tire guys): https://www.continental-automotive.com/en/components/seat-comfort-systems/seat-adjustment.html https://www.continental-automotive.com/en/components/seat-co... But Tesla loves "innovations" that are just an excuse to vertically integrate in an inferior manner. That's stuff like the "superbottle" which integrates a bunch of parts you could normally replace independently with common parts into one (super easy to integrate on the assembly line) package
  - hagbard_c 3y ago
    > ...and the microcontroller will cut power to the window lifting motor. Usually the controller will reverse the motor instead of just cutting it. You want the window or door to stop strangling the cat, not just do it somewhat more slowly. source: experimentation with power windows and doors, garage doors and similar objects. I actually started doing this after a misadjusted garage door strangled one of our cats.
  - binary132 3y ago
    Usually it will also back off since by the time it's spiking current it's already applying pressure.

polishdude20 3y ago

Isn't there some mechanism to sense the torque feedback or something and stop the door closing?

Rinzler89 3y ago
There is, power windows in cars have had it for over 20+ years or so, for safety, so kids/dogs don't strangle themselves with the windows. It's a 1 cent shunt used for monitoring the current consumption of the motor. If the current spikes, it means something jammed it(or it reached the top/bottom) and the microcontroller will cut power to the window lifting motor. Maybe Tesla can look into that cutting edge tech once they wrap up humanoid robots.
- slipheen 3y ago
  It seems bizarre to me that they wouldn’t have that sensor, I wonder if maybe it’s because they somehow didn’t calibrate properly for the force at the top angle? I don’t have/want to cybertruck, but I wonder if it would stop properly if you were to have something at the bottom blocking it.
  - engineer_22 3y ago
    It does have it, lots of videos of people putting their arm/hand/whatever in the cyber truck frunk to demonstrate it stops closing. If you get pinched close to the hinge your reaction won't generate a lot of torque on the motor, it will be less than the weight of the trunk itself.
  - BoorishBears 3y ago
    It's not bizarre when you realize how Tesla cuts corners under the guise of innovation. Take their power seats not stopping for obstructions: most auto manufacturers do not make their own power seat modules. They buy those from suppliers like Bosch and Continental (yes, the tire guys): https://www.continental-automotive.com/en/components/seat-comfort-systems/seat-adjustment.html https://www.continental-automotive.com/en/components/seat-co... But Tesla loves "innovations" that are just an excuse to vertically integrate in an inferior manner. That's stuff like the "superbottle" which integrates a bunch of parts you could normally replace independently with common parts into one (super easy to integrate on the assembly line) package
- hagbard_c 3y ago
  > ...and the microcontroller will cut power to the window lifting motor. Usually the controller will reverse the motor instead of just cutting it. You want the window or door to stop strangling the cat, not just do it somewhat more slowly. source: experimentation with power windows and doors, garage doors and similar objects. I actually started doing this after a misadjusted garage door strangled one of our cats.
- binary132 3y ago
  Usually it will also back off since by the time it's spiking current it's already applying pressure.