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Old 04-19-2018, 11:41 PM
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Default Tesla Brembo Electric Parking brake

I picked up a pair of electric parking brake calipers from a Tesla to use on another project, but after tearing into these, it seems like it could be a very simple and cheap parking brake option for anyone with different brake setups out back...
Anyway, there is a 4 pin terminal on each caliper, 2 of the pins are the motor wires, the other two seem like a temperature sensor (ohm reading between the two pins rises/falls with temp)
Im sure the Tesla has some kind of current sensing algorithm in their BCU that says x Amps = x clamping force but for simplicity I think im going to just use proper judgement with an amperage "overload shutoff" so that if I did hold the switch too long it would cut power to prevent burning something up. Does anyone know of any off the shelf parts that could accomplish this? I did some googling but Im not too sure I know what Im looking at with some of these current shutoff switches.

BTW, I paid $114 shipped (for the pair!) on ebay. If you have the depth needed for these calipers its a very economical option compared to the mechanical brembo spot calipers (not even sure where to get those) or the IPSCO calipers. They are setup for a 1.1" wide rotor, but its a split caliper, so a simple spacer could get it over a 1.25" rotor

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Old 04-21-2018, 05:08 PM
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Tesla is really committed to making everything electric! Does that servo drive the the brake pad out on a screw drive or does it just turn a fixed amount (like 1 turn)? If it's a fixed amount that is like a mechanical Brembo (so it self adjusts for pad wear). If it's just turning a jackscrew than you will have to do current sensing.

I got my Brembo parking caliper from someone who converted a street Viper to a race car.
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Old 04-25-2018, 01:31 AM
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Its a jack screw, so the current sensing is going to be the way to go... My neighbor is going to make me a small processor with a shunt, Hbridge and some arduino code to give me soft start/stop and current based limiting. Should be pretty cool!

Nice score with those viper calipers! I was looking forever for a set and never found anything (besides the ferrari ones $$$$)
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Old 05-15-2018, 07:35 PM
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that would be awesome.....my wife had a knee replacement and pushing down is hard for her.....i love the idea of push button electric parking brakes
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