>If you meant "the only thing I can think of", ok ok ok, agreed that would have been a good way to put it. But for heavens sake cut me some slack, English isnt my first language and its hard to find the exact right words. I'd like to see you try to do better in my language. >people suggest things, you argue why they're wrong instead of trying >the suggestions No, I implemented the filtercap suggestion and also tried almost every suggestion made by Jinx so far. His suggestions helped me conclude that these pots are crap and I'll get a new ones. Thanxs again btw =) > If you're so sure what is and isn't wrong, Thats how we work here. Someone suggests can it be this or that? We check, and come back: No, it cant because... or yes thats it! If someone is sure he is right he explains why he is right and if the others cant explain why they think he is wrong his point stands. You call it arguee, we call it working together troubleshooting. >> There probably is a magnectic coupling >is this not a normal pot with the shaft mechanically tied to the wiper? No, its no normal pot. Ive said its a special expensive one, laser trimmed for industrial linear measuring use. Again English isnt my first language so I have problems to describe that part of it but here goes. It has got a plastic part outside a alu. housing that moves ontop of a stainless plate, no mechanical connection through to the inside so when the plastic part moves the wiper inside must move by mag-force or woodoo. (I am wildly guessing magnetic, but thats just me and I am barely qualified to sit on a chair so dont take my word for it) >You "bet", meaning you simply assume it won't work No, I dont. Its you that simply assume that I assume that. Actually I meant alot, but didnt want to go into detail about it since it is a slow 'painfull' process for me to write in English. And thers a good chance I get yelled at :P I am sure you could suggest an R-C filter that would help smooth out the jumps to 95% within 0.1s and it would be very interesting to try how much of the sympthoms it actually could be fixed just for the fun of =) But there isnt supposed to be any noise or jump issues to begin with. So my thought was why try to fix/reduce this faulty pot's output with first a cap, then a RC filter and might end up not good enough in the end. So it is better to get a new working pot w/o these issues. These pots sits in a place that vibrates enough for them to give out random signals which the RC-filter would haveto smooth out all the time. Also when the pot stops efter movement it overshoots 250% of the actual value it measures. This means the sensors would be giving out false readings all the time, not the best of conditions for accurate measurements. >you need to explain what the real problem is. There should be no noise issues, nor jumps to begin with! Thats the real problem. Adding caps and filters is hiding the problem, not solving the ground problem. When I first tested the pot it was impossible to get a good reading due to the severe noise. Thats not normal, but hey there is a switched powersupply so it could be due to that and not a faulty pot so fix that. Filtecap added, and the signal looks good. Now the tests, not drowned in movement noise or anything from the PS, shows the output 'jumps' and it gets worse as speed increases. Thats bad, really bad. >it has a linear slider instead of a turning shaft? Correct >> Don't know how many wipers. >How could you not know this!? First, pins - 2 is a good starting point. >Second, if it's really a slide pot instead of a circular one, then it's only >got one wiper. Yes, its a linear slide pot. (didnt know it was called that) I thought you meant if it had more than one wiper inside on the plastic track. I didnt want to make the assumtion it can't have more than one wiper inside the housing w/o bringing it out to the outside. Possibly more than one wiper is what they use to make the no-noise-pots. Not all pots are equal I thought. Hence I wrote I dont know, since I dont know for sure if there absolutely can not be more than one wiper inside. >The reason I asked was if you had a two-wiper pot and tied the wipers >together, you'd not only get strange readings but also would be asking for >extra scratchiness. Interesting, didnt know that. Good info. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist