PTU-5 User Manual
Copyright 2017, FLIR Commercial Systems, Inc.
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5.1.1 - Default Limits
In Figure 5-1:
• The positive pan axis direction is clockwise when looking down at the top of the PTU.
• The positive tilt axis direction is clockwise when looking sideways at the PTU with the motors and
connectors facing to the right.
Figure 5-1: Pan-Tilt Default Factory Limits (PTU-D100 shown with identical limits to the PTU-5)
5.2 - Resolution and Step Modes
The PTU uses stepper motors that drive the unit through a gear reduction system. The internal controller
allows stepper motor control in manual (½, ¼, and 1/8) or automatic step modes. The following table
lists the pan and tilt axis resolution in degrees.
Note: The default pan axis user limits are +/- 168°. The default tilt axis limits are +30°
and -90°. You can only use the full +/-90° tilt axis with side brackets because the top
bracket will impinge on the PTU body.
Note: Larger step modes increase torque and maximum speed vs. smaller step modes.
The PTU includes an automatic stepping mode (auto-step) that optimizes this trade-off
for many applications. You may command the PTU in 1/8 steps when in automatic
stepping mode.
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