[theonetruerat]

Ok, I have a quick question about making a throttle for my Curtis controller. It's set up for a 0-5Kohm throttle controller. If I exceed 5Kohm will the controller simply view this as max throttle and be fine or will I rip a hole in the time space continuum to a universe where I have to buy a new controller and suddenly have a very big and square paper weight.?

Thanks,

 

[piotrsko]

Max throttle voltage occurs when the pot wiper is close to the zero setting resistance, so: no it won't alter the STC. But you also won't get full pedal stop to reach minimum available power ,it will occur somewhere else, probably mid throttle. Kinda like the throttle on a ford 460 low geared 1ton pickup, really touchy.

 

[theonetruerat]

Max throttle voltage occurs when the pot wiper is close to the zero setting resistance, so: no it won't alter the STC. But you also won't get full pedal stop to reach minimum available power ,it will occur somewhere else, probably mid throttle. Kinda like the throttle on a ford 460 low geared 1ton pickup, really touchy.

Thanks,

I guess I was a bit spare on what I'm doing. I'm using a rotary potentiometer to build my own throttle. Most of these require about 320-340 degrees to go through their full range. I figured If I could use a 10K potentiometer I would have fewer degrees to deal with and would have an easier time with the design and construction. I will limit rotation to give me 0-5K I just wanted to be sure that I'd be good if it was more like 0-5.47K

Thanks again.

 

[cricketo]

The controller acts as a voltage source to which resistance is applied. Extra resistance can't hurt it. Also regarding your mechanical problem you can use another trick - if you use a 20k pot and parallel the outer legs, you will get a 5k-0 from the middle to the limit on either side.

 

[theonetruerat]

The controller acts as a voltage source to which resistance is applied. Extra resistance can't hurt it. Also regarding your mechanical problem you can use another trick - if you use a 20k pot and parallel the outer legs, you will get a 5k-0 from the middle to the limit on either side.

Thanks for pointing that out. It's funny, I stack regular old resistors in parallel or series all the time to get what I want but I never even thought of sticking two potentiometers in parallel. Guess that shows how long it's been since I took circuits.

 

[cricketo]

Thanks for pointing that out. It's funny, I stack regular old resistors in parallel or series all the time to get what I want but I never even thought of sticking two potentiometers in parallel. Guess that shows how long it's been since I took circuits.

Hehe Here is a visual aid btw : https://tinyurl.com/yhdp5krv Use the "Resistance" drag bar on the right to see the effects