Faulty Scissor-lift

When you’re using the joystick, why would my scissor lift lift one time, but then suddenly lose power. We’ve tried seeing whether it was the motor, changed it, then added some gears to hopefully focus the power from the motor, but no success, the cortex is programmed and all and we really don’t know how to fix it. Is it just like a glitch in the programming, or…?

Can you please post your code in case it’s a bug that’s causing your issues?
Surround your code with these brackets when you post it so that we can more easily read it:

Most likely motor PTC trip.

Lots of rubber bands on the scissor help.

Okay can you post a picture of what the gearing looks like?

And what speed motors are you using?