Interesting Cruise Control Brain Stuff
12-05-2014, 01:33 PM
#16
Rennlist Member
Mine had the same symptoms as the one on the left. Would accelerate but not hold. Sent it off to Beckman Technologies . For $160. it was repaired and hasn`t missed a beat since. They do rebuilding of MB parts and VDO parts.
12-05-2014, 04:16 PM
#17
Burning Brakes
Alan i was talking about original condenser. Sure you can upgrade to 25, there are some pcb that use also 2 condenser, bboth 22uf 40 volts.
Those pcb so are virtually the same on porsche BMW, MB..... Problems are the same, ageing and some solder point weakened by time vibrations and too much cold/hot cycles....
Those pcb so are virtually the same on porsche BMW, MB..... Problems are the same, ageing and some solder point weakened by time vibrations and too much cold/hot cycles....
12-05-2014, 07:02 PM
#19
Electron Wrangler
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Alan i was talking about original condenser. Sure you can upgrade to 25, there are some pcb that use also 2 condenser, bboth 22uf 40 volts.
Those pcb so are virtually the same on porsche BMW, MB..... Problems are the same, ageing and some solder point weakened by time vibrations and too much cold/hot cycles....
Those pcb so are virtually the same on porsche BMW, MB..... Problems are the same, ageing and some solder point weakened by time vibrations and too much cold/hot cycles....
Alan
12-06-2014, 01:14 PM
#20
Chronic Tool Dropper
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Room for some extra-long-life but more expensive tantalum caps? That's a lot of discrete circuitry in there! Mine works pretty well, but has an odd symptom where the initial speed set is maybe one MPH slower than actual speed. So to engage initially, and immediately add a couple extra flicks to the lever. After that it's flawless. Not quite enough to make it worthwhile digging into the controller.
This all seems like something that could be easily brained into a RP or Arduino controller, if these modules start mass age-failing.
This all seems like something that could be easily brained into a RP or Arduino controller, if these modules start mass age-failing.
12-07-2014, 02:32 PM
#21
Burning Brakes
Yes I get that - but Porsche made quite a bad choice to use 16V Caps - it is likely that a car will see many spikes over 16v in its lifetime as alternators go bad - just not enough headroom. This likely contributes to premature failures - maybe they would say it has more than met their original MTBF goals - but that is not much consolation when modules start failing on your car.
Alan
Alan
I found good informations translating this with Google,, when my ex bmw 635 cruise control failed ....
http://www.sternzeit-107.de/modules....rticle&sid=297
12-09-2014, 08:08 PM
#23
Interesting. I never use Cruise control. I'm usually focusing on driving. 
12-09-2014, 10:37 PM
#24
Chronic Tool Dropper
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The cruise control has saved me from some rather inconvenient delays while driving cross-country. If I set it somewhere between the posted limit and the speed traffic is actually flowing, I manage to avoid meeting local judges. Without it, the car seems to work its way to the fastest-traffic lanes and go no slower than any of the other cars on that road.
New digs sport 55 mph max on any but interstate highways. Good news is that the LEO's seem to run their radar units all the time so not too much worry about surprises. Still, for most casual travel I use the cruise just to be safe.
New digs sport 55 mph max on any but interstate highways. Good news is that the LEO's seem to run their radar units all the time so not too much worry about surprises. Still, for most casual travel I use the cruise just to be safe.
12-09-2014, 10:49 PM
#25
The cruise control has saved me from some rather inconvenient delays while driving cross-country. If I set it somewhere between the posted limit and the speed traffic is actually flowing, I manage to avoid meeting local judges. Without it, the car seems to work its way to the fastest-traffic lanes and go no slower than any of the other cars on that road.
New digs sport 55 mph max on any but interstate highways. Good news is that the LEO's seem to run their radar units all the time so not too much worry about surprises. Still, for most casual travel I use the cruise just to be safe.
New digs sport 55 mph max on any but interstate highways. Good news is that the LEO's seem to run their radar units all the time so not too much worry about surprises. Still, for most casual travel I use the cruise just to be safe.
Oregon? And from SoCal to Texas you can cruise at 100 and be fine.
Taxation without representation.
12-11-2014, 10:14 AM
#26
Rennlist Member
Mine works pretty well, but has an odd symptom where the initial speed set is maybe one MPH slower than actual speed. So to engage initially, and immediately add a couple extra flicks to the lever. After that it's flawless. Not quite enough to make it worthwhile digging into the controller.
12-12-2014, 04:16 PM
#27
Racer
The tantalum capacitors are not as reliable as you'd like them to be. Use proper elco's which will last another 15 years For the smaller ones a MKS type is the preferred choice.
Theo
For the smaller ones a MKS type is the preferred choice.Theo