Paramount GEM User Guide
33 | P a g e
When the three Status LEDs on the
Electronics Box are illuminated (see
“Visual Control System Feedback” on
page 34), the control system is
functioning nominally.
When the servomotor
initialization is interrupted,
shortly after mount is
powered on.
To initialize the control system, turn on the mount and
listen for the whistle sound and two successive beeps,
without attempting to control the mount via joystick or
TheSky Professional.
Servomotor initialization can be interrupted by the
following actions.
• Pressing and holding the joystick button down and
turning on the mount.
• Moving the joystick from its center position before
the servomotors are initialized.
• Attempting to slew or home the mount from TheSky
Professional before servomotor initialization.
• When one, or both, of the mount’s axes is locked and
prevents motor initialization (page 63).
One lower pitch
tone and one
higher pitch tone
Shortly after the mount has
slewed to the home position
in each axis.
Indicates that mount has successfully located the home
position in both axes (page Error! Bookmark not defined.).
Continuous,
successive, high-
pitched beeps.
May occur when attempting
to slew the mount or after
issuing the Find Home
command.
This sound indicates a control system error condition.
Something is preventing the servomotors from rotating, so
the motors cannot be initialized, or, mount cannot slew or
track normally.
Typical causes include:
• The mount’s axes are locked (pages 63, 75, 77).
• The mount encountered a fixed object while slewing.
For example, the counterweight shaft has run into a
step stool that has been placed next to the pier.
• The telescope is significantly out of balance and
exceeds the maximum torque output of the motor.
Make sure the telescope is balanced before
proceeding.
• Increased drive train torque demands during cold
temperature operation can prevent slews.
• The worm block spring plungers are too tight, causing
the motors to stall.
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