Angle to servo pulse relation for M100RAK gearbox

[pyrrhicpk]

Hi,

What is the angle to servo pulse relation for HS-785HB (5:1) gearboxes used in M100RAK?

Thanks

[pyrrhicpk]

Hi,

Yes, but how should one calculate the pulse width for a specific angle in degrees? For example, what should be the pulse width to produce a 45 degree rotation from the center position (1500) on the gear shaft of a 5:1 gearbox?

Thanks,
Kind regards

[pyrrhicpk]

On a normal 785HB (without gear down), the 600 to 2400 pulse difference corresponds to 1260 degrees. Add a 5:1 gear down, and the 600 to 2400 pulse difference corresponds to 1260 / 5 = 252 degrees. Therefore:
600 = -126 degrees (or 0 degrees)
1500 = centered
2400 = +126 degrees (or 256 degrees)

256 degrees = 1800 pulses, so each degree is ~7 pulses.
45 degrees would be 316.

Thanks for the help.
Should it be 256 degrees = 1800 pulses or 252 degrees = 1800 pulses ?

[cbenson]

The pulse going to each of the gear boxes should be between 600 and 2400, with 1500 being center.

[cbenson]

On a normal 785HB (without gear down), the 600 to 2400 pulse difference corresponds to 1260 degrees. Add a 5:1 gear down, and the 600 to 2400 pulse difference corresponds to 1260 / 5 = 252 degrees. Therefore:
600 = -126 degrees (or 0 degrees)
1500 = centered
2400 = +126 degrees (or 256 degrees)

256 degrees = 1800 pulses, so each degree is ~7 pulses.
45 degrees would be 316.