bigal_scorpio
Active Member
Hi to all,
Well Eric, here it is!
What I want to do is make my car seats which are electric, have some kind of memory positioners like they have in many of the new cars today.
The seats have 3 motors in them 1 for height, 1 for backrest angle and 1 for seat position (nearer or further from steering wheel), they also have a motor for a lumbar support but this never gets used and is in one position whoever drives it, so I will ignore that one!
My intention is to have a PIC monitoring the positions and remembering them so I could press a single button when entering and have the seat adjust for either me or the missus.
If the wife has been driving the car when I get in my nose is touching the windscreen, mainly because she has the backrest tilted forwards at an angle of about 20%, I don't even know how she can get out without walking like quasimodo!
But if thats how she's happy driving then who am I to complain, besides moaning at the missus is a dangerous thing!
My problem is how to get the position of the motor and then remember it in a couple of different positions. I have googled for weeks to find how the new cars do it and found nothing!
I have thought about using rotary (shaft) encoders, but they seem fairly expensive and are pretty complicated with their grey coding etc.
Has anyone got a simpler method of finding the position of a standard dc motor? It does not need to be precisely accurate but if it is then all the better? I was thinking of maybe using pots connected to the seat somehow, but the mechanical part would be quite complex so if anyone has a better method then feel free to jump in.
Al
Well Eric, here it is!
What I want to do is make my car seats which are electric, have some kind of memory positioners like they have in many of the new cars today.
The seats have 3 motors in them 1 for height, 1 for backrest angle and 1 for seat position (nearer or further from steering wheel), they also have a motor for a lumbar support but this never gets used and is in one position whoever drives it, so I will ignore that one!
My intention is to have a PIC monitoring the positions and remembering them so I could press a single button when entering and have the seat adjust for either me or the missus.
If the wife has been driving the car when I get in my nose is touching the windscreen, mainly because she has the backrest tilted forwards at an angle of about 20%, I don't even know how she can get out without walking like quasimodo!
My problem is how to get the position of the motor and then remember it in a couple of different positions. I have googled for weeks to find how the new cars do it and found nothing!
I have thought about using rotary (shaft) encoders, but they seem fairly expensive and are pretty complicated with their grey coding etc.
Has anyone got a simpler method of finding the position of a standard dc motor? It does not need to be precisely accurate but if it is then all the better? I was thinking of maybe using pots connected to the seat somehow, but the mechanical part would be quite complex so if anyone has a better method then feel free to jump in.
Al