Anyone running a MC-2100 with original motor?, if so is the tach signal necessary to run when used in a secondary application? or is it just for console indicator?
If it is needed, what is the nature of it and the resolution, as far as I can tell it is a reed switch sensor.
Max.

 

Hi Max,

I have a MC-2100 with original motor running without the reed switch sensor.

 

Hi Max,

I have a MC-2100 with original motor running without the reed switch sensor.

Thanks good to know.
However, what is the nature of the sensor if you have it, and what is the resolution per rev of the sensor wheel?
Max.

 

Thanks good to know.
However, what is the nature of the sensor if you have it, and what is the resolution per rev of the sensor wheel?
Max.

To be precise, the treadmill has a reed switch like the one below. The wheel has only one magnet attached. It gives a pulse per revolution.

 

I wonder how the system makes speed compensation with such bad resolution.

 

From what I have gathered on the web and from your post, It appears the sensor is just for indication on the console, not feedback to the motor.
BTW how are you controlling it presently, from one of the PWM circuits on the web?
Max.

 

I'm planning to use a reed switch like that as feedback for my motor controller. But I'm starting to consider that poor resolution. I have other treadmills models which use them, but do they really serve as feedback mechanism?

 

I have been experimenting with slot opto method and have so far used 10 slots per rev.
For up to 4krpm.
Max.

 

What circuit are you using to create the 50ms PWM command signal?
Max.

 

What circuit are you using to create the 50ms PWM command signal?
Max.

Actually, I will go with higher frequency, maybe try between 1 to 10 kHz. I'm using timer 1 from a STM32L432KC nucleo.

 

Now I remember that few months ago I slightly modified this circuit to create the PWM signal for the MC 2100. It worked pretty well with a pot.

 

The PWM command signal goes from the opto out direct to the processor IC.
It has been reverse engineered as 50ms duration.
Max.