Martin MAC III AirFX User Manual page 26

If you are going to switch between using the MAC III AirFX as a manually-controlled followspot and as a
DMX-controlled moving head from time to time, you will need to install and remove followspot handles. In
this case, we recommend that you fabricate two intermediate mounting brackets in a suitable material for
repeated installation and removal of screws, fasten the brackets permanently to the rear head cover, and
use these brackets as mounting points for the followspot handles.
If followspot handles are going to be installed permanently, there is no need for intermediate brackets.
The design of the brackets and followspot handles is left up to the user to match user requirements, but the
following points must be noted:
• Intermediate mounting brackets must be as light as possible in order to minimize the effect of their extra
weight on the balance of the head. It may be best to make them in aluminium.
• Four holes (arrowed in Figure 15) are provided in the fixture's rear head cover for fastening followspot
handle mounting brackets.
• On most MAC III Profile fixtures manufactured before August 2009, the four holes are drilled but not
threaded. If you have reconfigured a MAC III Profile as a MAC III AirFX, check these holes. If they are not
threaded, use M6 thread-forming screws (DIN 7500) to fasten mounting brackets. Torx head screws are
recommended because considerable force will be required to tighten the screws into the rear cover. If the
four holes are threaded, use regular M6 machine screws for attachment.
• Whatever type of screw used, the
portion of the screw that goes into the
rear head cover must have a length of
between 12 mm (0.47 in.) and 15 mm
(0.6 in.).
• The rear head cover becomes very hot.
Ensure that handles are insulated well
enough to avoid discomfort or burn
injuries for the followspot operator.
• A handle must only be fitted after
followspot mode is enabled and tilt is
performed manually. Always remove
any handle that is fitted before
disengaging followspot mode.
Besides being constructed so that they
will not foul the yoke at any point in the tilt
range, mounting brackets must match the
dimensions shown in Figure 15.
Dimensions in Figure 15 are shown in
millimeters:
• 216.8 mm = 8.53 in.
• 230.7 mm = 9.08 in.
• 78.9 mm = 3.11 in.
26
Figure 15: Dimensions for followspot handles
MAC III AirFX user manual