TMoore
rrProfessor
Location: Cookeville, TN
| Exponential is where the servo motion is modified by the percentage value that you input.
In the case of the ATX radio this would be a positive value for a feel that is softer around the stick center. As you move the stick, servo motion is not following the stick command in a linear fashion because the motion is now being calculated based on the percentage rate you have input. With exponential, the higher the percentage the slower the servo moves relative to stick input up to a point in the stick travel that is calculated by the actual exponential percentage. As an example if you give 50% rate in expo, the motion curve is calculated to become linear at 50% either side of stick center.
VTR does almost the same thing but instead of calculating a smooth motion of the servo for a given stick travel like expo the VTR function will basically let you dog bone the servo output at a point of your choosing. If you look at the motion on a graphic display the VTR is essentially two linear movements with a point that determines where linear motion starts to come back in. You may set the pivot point or the knee as we used to call it and the rate. Essentially this gives you two dual rate functions based on stick position.
There have been time when VTR actually made the machine feel better in the hover than expo. This is one possible use for VTR.
Terry |
