360+ potentiometer

Hi, I'm searching for a 360+ potentiometer, what I mean by "+" ?
is to rotate in a single direction for infinite number of times, is there such pot?

or should I improvise and modifie one?

D.60

There's been a thread about this already: Potentiometer with Continuous Rotation - Sensors - Arduino Forum

Domino60:
Hi, I'm searching for a 360+ potentiometer, what I mean by "+" ?
is to rotate in a single direction for infinite number of times, is there such pot?

or should I improvise and modifie one?

D.60

What value pot, from zero ohms to ! ! ! !
You might consider these.
https://www.circuitspecialists.com/precision-10-turn-potentiometers

They are 10 turn, but if you are looking for 360Deg or 5 or 8 turn, these would do the trick, with extra turns as an extra.
What is the application?
Tom.. :slight_smile:

TomGeorge
This pot looks really nice and 10 turns looks promising for a project but I need to use something with more
turns than 10, i was thinking to use a “rotary IR encoder” as the printers use but it’s too big and consume
a lot of space for what I need.

I need to measure how many turns a motor has done to determine to stop the motor or not and find the
position of something that I’m turning, the motor is going/doing 2000 RPM so as you can see I need to attach the
pot at the shaft of the motors so 10 turns will not be enough.

I want to attach the pot at the shaft because of the lack of space, i want to make is as compact as possible.

D.60

Domino60:
Hi, I'm searching for a 360+ potentiometer, what I mean by "+" ?
is to rotate in a single direction for infinite number of times, is there such pot?

or should I improvise and modify one?

D.60

First of all, a potentiometer typically has three terminals. It can be used as a variable resistance, or it can be used as a voltage divider, etc.

Some potentiometers allow you to turn the dial without limit. However, usually, when you turn the dial beyond a certain position, the middle terminal (aka wiper terminal) can go open circuit. It is only when you keep turning, the wiper will then eventually get back to the normal operating range.

So, it's really a case of whether you're talking about a potentiometer, or something else.

Domino60:
I need to measure how many turns a motor has done to determine to stop the motor or not and find the
position of something that I'm turning, the motor is going/doing 2000 RPM so as you can see I need to attach the pot at the shaft of the motors so 10 turns will not be enough.

For 2000 RPM, which is relatively fast, you probably need hall effect sensor.

hall effect sensor

Something like magnetic sensor? Well that will be a problem, my motor has gears so the shaft spins as
2000rpm but the motors spins faster.

Well pot doesn't look right so use as I think about it as Southpark said about the wiper ..etc after
a long time the wiper will wipe out :smiley: the metal material / sensor to determine the position.

Do u got any ideas on really small "rotary IR encoder" ?
maximum 10~15mm diameter

EDIT:

I think i found something>>

D.60

Domino60:
TomGeorge
This pot looks really nice and 10 turns looks promising for a project but I need to use something with more
turns than 10, i was thinking to use a "rotary IR encoder" as the printers use but it's too big and consume
a lot of space for what I need.

I need to measure how many turns a motor has done to determine to stop the motor or not and find the
position of something that I'm turning, the motor is going/doing 2000 RPM so as you can see I need to attach the
pot at the shaft of the motors so 10 turns will not be enough.

Magnetic rotary encoder. No physical contact, just a particular magnet on the end of the shaft and the
appropriate sensor chip 1mm from it?
http://www.mouser.co.uk/new/ams/ams-as5601-sensor/

In my case a magnetic one will not do, im thinking of a IR one, I use gear so the speed of the gear and
motor is differenet. Ofc i could debug ..etc but that's extra work