SPACECAM
SYSTEMS, INC.
MAXIMUS 7 OPERATOR’S MANUAL
August 17, 2016
3.2.13 Stability and Master Gain.
To achieve best stability the gimbal must not have rattling and flexing parts. All devices and wires must
be secured tightly and rigidly. The gimbal also must be balanced on all three axes.
The Master Gain is an overall scale for all the servo loop’s gain. Most of the time it is sufficient to tune
this parameter to match servo stability to the payload’s inertia. For higher inertia the gain must be higher.
At manufacturing the gimbals are setup with an average payload and all servo loops are refined for
optimum stability at that time with the Master Gain set to 1.0. The Master Gain can be raise up to 5.0 or
lower it to 0.2 for the servo loops. The parameter also can be observed in the General Parameter table
(#Master Gain) using the Maintenance program
)
.
To recall Master Gain:
The Master Gain of stabilization can be displayed on the screen by pressing F4.
To alter the Master Gain:
Press and hold F4 while changing the gain using the up/down arrow keys.
1.0 is the default setting for average payload inertia. Set the gain to 0.2 to 0.4 for operating without a
payload. When setting up a new payload always start with a lower number and gradually increase the
gain until the gimbal is responsive enough. Do not let it oscillate (audible sound). Making notes for new
setups helps find the correct number quickly the next time.
It is possible to tune the individual axes. The procedure is dangerous and is outside the scope of this
manual. Recommending SpaceCam trained technicians to do the procedure.
31240 La Baya Dr. Ste. A
Westlake Village, CA. 91362
818-889-6060
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