Sine Cosine Position Sensor (Potentiometer)
Since 2016, I've been using Sine/Cosine potentiometers as a signal source for vector image rotation on the Z-5 analog console. It was important to find one with extremely low rotational friction so that the potentiometer could spin freely.
Unfortunately, around 5 years ago the source of these potentiometers went away. I had many discussions with an engineering friend of mine, the legendary Ed Keefe, before he passed. He came up with an interesting method to build a sine/cosine position sensor.
I didn't have a need for any more sine/cosine potentiometers until recently. While designing the Z-Fx controller, I decided that having the ability to rotate an image would be a very effective feature, similar to the feature on the Z-5. With a renewed need for a sine/cosine potentiometer, I set out to build Ed Keefe's design to see if it would function as needed.
After months of spinning different parts on a mini-lathe, I've finally manged to develop a product that will perfectly handle image rotation on the Z-Fx!
I have also decided to make these available to anyone with a need for such a unique device.
Unfortunately, around 5 years ago the source of these potentiometers went away. I had many discussions with an engineering friend of mine, the legendary Ed Keefe, before he passed. He came up with an interesting method to build a sine/cosine position sensor.
I didn't have a need for any more sine/cosine potentiometers until recently. While designing the Z-Fx controller, I decided that having the ability to rotate an image would be a very effective feature, similar to the feature on the Z-5. With a renewed need for a sine/cosine potentiometer, I set out to build Ed Keefe's design to see if it would function as needed.
After months of spinning different parts on a mini-lathe, I've finally manged to develop a product that will perfectly handle image rotation on the Z-Fx!
I have also decided to make these available to anyone with a need for such a unique device.
The Sine/Cosine Position Sensor requires +5VDC and will output two independent signals (sine/cosine) based on the position of the shaft. The shaft is 6mm in diameter. Additional dimensions below.
The price for 1 unit is $85 + Shipping. This does not include a knob to attach to the shaft. Only the Z-Fx will include a knob, attached to the shaft via a set screw. There are a number of options for a knob that supports a 6mm shaft diameter on the market, including on Amazon.
The output signal is offset by +2.5V and is about 4Vp-p (+/-10%). Not shown in the drawings below, the shaft extends 16mm (+/-10%) from the housing and is 6mm (+/-0.02mm) in diameter.
The price for 1 unit is $85 + Shipping. This does not include a knob to attach to the shaft. Only the Z-Fx will include a knob, attached to the shaft via a set screw. There are a number of options for a knob that supports a 6mm shaft diameter on the market, including on Amazon.
The output signal is offset by +2.5V and is about 4Vp-p (+/-10%). Not shown in the drawings below, the shaft extends 16mm (+/-10%) from the housing and is 6mm (+/-0.02mm) in diameter.
