Hello AutoGen,

it is important that the logo knows where the turntable is. Therefore, in addition to the target value (potentiometer), you also need an actual value from the turntable. The program consists of two compressors that each switch the drive in the right direction until the target and actual values ​​are the same.

Regards Ella_68

(translated with google)

Thank you very much for your reply Ella_68.
​

I just wondering if the only way is to wire 
another potentiometer and adjust its value 
to the middle of the scale (hole3)??
And ​every time I want to change the divider, 
I have to turn it to the middle.
 And select the required point after this??

You have two potentiometers. You move one by hand (setpoint). The other is firmly connected to the plate (actual value).Logically, there is no room for a third potentiometer. You can only add the circuit in the setpoint.

But based on your reasoning, a potentiometer is unsuitable for the operator. Unless it has its own motor drive. The Logo is too slow for an incremental encoder that controls a counter.

How about button operation ?

One button for left rotation, the second for right rotation and one for the middle position. To do this, you use the counter from the LSC and enter 500 as the starting value (with a range of 0-1000).

To make input easier, you can also use a "push and hold" function.

Or work with buttons and fixed values ​​if the objects are always the same.

Or with a combination of both. But you have to "build" a counter yourself. Jump and save values ​​would then also be possible.

Regards Ella_68

Thanks again for the reply.
I really appreciate this portal.

However, I want to try the potentiometer and 
(AnalogMUX) and (Analog Comparator) one more time.
But I couldn't figure out how to connect the 
five inputs to (AnalogMux).
Probably it's impossible??

I must fix the program so that the direction of rotation

dont change when the limit is not coming from the sensor.

Or should I just give up???

It's actually not that difficult. Just use several muxers .

I think it's easier to modify your program than to explain everything in text. Take a closer look at it. If you have any questions, just ask in the forum.

"I must fix the program so that the direction of rotation
dont change when the limit is not coming from the sensor."  ???

I'm sorry, I don't understand that statement.You have to be more specific.

Regards Ella_68

Hello.
I am really grateful that you found a solution to my problem.
Thank you Ella_68.

Glad I could help and have fun continuing...

Greetings Ella_68