motor pots

What size pot do you recommend to use for controlling a 12vdc wiper motor? I am hoping that they are not to costly.

Thank you
Terry w

5K or 10K Linear pots, they can be found as cheap as 2-3$ in local store, but they don't last long, they wear after some weeks of use and slowly sending the 'dirty' signal which makes motor jitter. Those are the cheap ones. There are also higher quality linear ones from 20-50$ that last much longer.

Lately the Hall Effect pots are becoming popular here, they are the ones with cleanest signal and last long, can be found from 30-40$ and above.

Take a read here about Hall pots:
http://www.xsimulator.net/community/index.php?threads/Hall-effect-potentiometer.4948/

cermet (ceramic metal track) are the one which deserves to be expensive as it is the highest quality standard.

A few of us have started using these http://uk.farnell.com/jsp/search/productdetail.jsp?SKU=2319661 because they can usually be had for around $20usd each or less!

If motor arm is only going to use 180 deg , which should be max for DC motors , then the 180deg hall effects are the best to use, from personally using them I would not step back to replacing pots every month as I have found with all others, but that's about 60+hrs of sim driving on a very harsh profile to kill cermet pots, and about 2 days for std cheap one.

I have to replace my worn out pot now wanted to ask some electronics expert if it is feasible a magnetic proximity sensor type these: http://www.directindustry.it/cat/mi...rossimita-magnetici-effetto-hall-AG-2169.html

If possible it would be great and nothing more wear or breakage because without contact.
Someone I can clarify things?
Thank you

Use the ones you were asking about in the other thread if you need 180 degrees.

My suggestion: Conductive Plastic Potentiometer. Up to 10 million turns.

Ok ,Thank you.

You say you are better than these? http://uk.farnell.com/jsp/search/productdetail.jsp?SKU=2319661

You can put a link of the shop please?

Better - not. But the hall pots are really sensitive and fragile, furthermore the minimum supply voltage is 4.5V instead of the 1V. So you can use with the non hall potentiometer a wider range. I have read something how to adjust the hall pots, surely the guys here will provide you with information.

The conductive plastic pots are a compromise between cost and lifetime. I bought this one (~17$), > 1 mio turns guaranteed:

http://www.conrad.ch/ce/de/product/...einstellbar-Lin-10-k-2-W-10-?ref=searchDetail

Better but more expensive ($??):
http://www.megatron.de/en/products/...uctive-plastic-potentiometer-series-mp20.html

The linear tolerance is only at 1%. Over 10 mio turns guaranteed.

There are many other conductive plastic on the market to try them out. IMO if one pot (under $20$) works for more than 6 months it is worth the money.

Not to forget: the conductive plastic pots are extremely easy to turn.

PS: my pots are now 2 months in action, no noise or malfunction.

PPS (better explained)

- Special impregnated plastic material with well controlled resistance characteristics
- High quality (audiophile and professional) pots, both rotary and linear (slide).
- Excellent life, low noise and very good mechanical feel

Thanks Pit your information can be very useful and I think I will cosider for purchase. Wanted to make an observation: if I understand correctly ... you said that if a potentiometer lasts more than 6 months must be regarded as lucky as I am more of a year use this type of potentiometer wire made in Germany and I've paid £ 9.50.




And I must say that until recently worked fine time ago now started acting up not score more esatta.Diciamo the position that if I do that I use an average sim in your spare time for more than a year will have worked about 150 ore.Secondo you the duration of my pots and good?

First, if your pots are working for more than one year I would say you are a lucky fellow and bought a really good one, of course German quality And please could you write the last sentence completely in English? I do not understand all. Thank you.

PS: the lifetime is one side, the other is the noise of a pot. The better the quality (less noise) the quieter and more linear the motors.

Ok, so should I keep these I have and that cost little ....

The last sentence was, ultimately did not work well potentiometers can no longer hold a position.Se I mean I used the sim in my spare time and about 150 hours ... more than a year.

I'm sorry but I use google translator and also I often do not understand what you say

Anyway thanks your information was useful to me