Does it have different holes below the motor unit to move closer?
Turn the black dial then push the blue lever down?
It has two sets of holes but have put it in the top holes as pet instructions. Problem with the knob is I'm not quite sure which way to turn it and it's so small it's hard to get a good trip on it.
I was given a much older TACX model. I had the same problem until I discovered the dial. As you posted - adjust the dial, then engage the roller by pressing the lever down until it locks.Turn the black dial then push the blue lever down?