Appropriate potentiometer for the teco fm50

Josh Rider

Josh Rider

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I tried to find this through the search and apologies if this is simple to some of you, but I'm having difficulty finding the right pot.
I ordered a teco fm50 and a 3 phase motor to replace my 3 speed single phase setup on my kmg.
I'm building my own enclosure based on what others have done on here to dust proof it.
I found some pots online and thought I was all set, but as I explained my setup to the ebay seller, he replied this pot would not work.

BOURNS 3500S-2-103 10K OHM 10-TURN 2W WIRE WOUND POTENTIOMETER NOS

From what i've read, i need a 10k linear taper, pot.

Can anyone recommend a model number?

Also, a big thank you to Patrice Lemee for the diagrams and help!
 
I respond to your PM an told you that just about any 10k pot would work. Here's a link to some on eBay and radio shack

http://www.ebay.com/itm/6x-B10K-10K...ol-knob-USA-/251885909590?hash=item3aa591f656

DSC_0263_zpsa925c72c.jpg


http://www.radioshack.com/10k-ohm-linear-taper-potentiometer/2711715.html

02711715_00.jpg
 
A 10 turn pot, would probably be a bit too fine an adjustment for your purposes. I would try a 1 turn first.

The Manual for the FM50 shows a 3 pin pot as well.
 
I read it Atlas and I appreciate the response.
Tried to get one but the seller said it would not work.
I didn't want to bug you again.
Thanks for the links!
 
A ten turn Pot would be roughly 6Hz per complete turn, do you need that kind of control on your speed?
 
ron_m80 said:
A ten turn Pot would be roughly 6Hz per complete turn, do you need that kind of control on your speed?
Click to expand...

I've never used it for an application like this so.....based on your reply I'm going to say noooo? :confused:
I was basing that off of a previous thread on the subject.
 
1-turn or 10-turn is really just a matter of preference.

If you are used to one, the other feels wrong.

If you are not used to one or the other already, 10-turn is not a problem at all and I'd actually recommend it. In some ways, it's actually better than a single-turn: mainly because you can't usually turn it faster than the ramprate you've set for accel/decel and you therefore don't get overshoot on the adjustment. A 10-turn with turns-counting dial can also be nice if if you have built your VFD into a windowless box and can't read the speed off the display easily: the dial gives very good repeatability on settings.

Once you've used a single-turn though, a 10-turn is just annoying.

I have found that it seems to be much easier to find good 10-turn pots than good single-turn pots for sensible money on ebay, at least over here.

When I have the budget or can get them free, I use AutomationDirect ECX-2300-5K or ECX-2300-10K, single-turn 22mm industrial panel-mount potentiometers. They are very good indeed. They match Telemecanique CB2 22mm industrial switches and they have screw terminals.

http://www.automationdirect.com/adc...ches_-z-_Indicators/22mm_Metal/Potentiometers

Otherwise, I've tended to use Bourns 3540 10-turn precision wirewound in linear taper and whatever value I can get that looks like it will work. I've had 10kOhm and 2.2kOhm that I can remember, bought on ebay. A bit more hassle to fit than the AD ones and they have solder terminals.

http://www.bourns.com/products/potentiometers/precision-pots-multiturn

and http://www.bourns.com/products/potentiometers/turns-counting-dials

I tend to stay away from the cheap pots with Carbon tracks. I've had one or 2 which have gone "jumpy" in the past at the setting where they see most wear on the track. It's usually a real PITA to change a soldered pot so I try to avoid having to do it.
 
Thanks fellas! Unfortunately almost all of the radio shacks around me went paws-up. The one that stayed open didn't have one.
Timgunn, I'm going from a 3 pulley system so either one will be new to me.
 
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