M8 Plus User Manual
15
V1.3 September 2012
www.chroma-q.com
2.8
Technical overview
The colour transport system employs an opto-electronic system for accurate positioning of the gel string. When the unit
initially receives power it will go through a calibration sequence. The purpose of the initial calibration sequence during power
up is to determine the total length of the gel string and therefore the position of the different gels.
Note:
Over time the gel string may warp slightly. This may alter the positions of the gels relative to their pre-programmed
DMX values and therefore some ‘fine-tuning’ may be required.
The motor has an optical encoder feedback system. The purpose of this is to convert motor revolutions in to electronic
pulses, and also to determine which direction the motor is turning.
The electronic cards consist of three key components: L6225PD motor driver, 75176 transceiver and a processor. The
L6225PD is a true digital device receiving two PWM signals to operate speed and direction. The 75176 transceiver operates
in the receive configuration to convert serial protocol to a TTL level. All data relevant to the operation of the unit is stored
onboard in ‘flash’ memory.
The majority of electronics problems are usually created by external factors such as shorted cables, etc. The 75176
transceivers are susceptible to damage if 24VDC is present on the DMX signal lines.
Routine maintenance can prevent most mechanically based problems. The motor mounting plate can be adjusted to control
tension on the belt. Excessive belt tension is often the cause of noise and poor performance. Conversely, loose motor belts
can cause accuracy problems.
Troubleshooting is a process of elimination. First, rule out the other field factors (i.e. faulty cables, power sources). If an
electronics problem is suspected inside the unit replace the electronics card first. If accuracy problems should occur and
mechanical problems have been ruled out, replace optical sensors. For technical advice and or parts, please contact your
selling dealer or the offices listed in this manual.
2.9
Technical specifications
Dimensions:
538mm (w) × 846mm (h) × 118mm (d)
21.2" × 33.3" × 4.7"
Weight:
5.58kg / 12.3lb
Aperture:
479mm x 631mm / 18.8" x 24.8"
Colour media:
Pro Color HT+, Roso Supergel and GAMcolor are recommended
Gel capacity:
2 – 16 frames
Cooling:
Forced air
Cooling Speed:
4 speeds
Addressing:
Digital, via push buttons (3) and LED display
Working Voltage:
24VDC (+/- 10%)
Power consumption:
1.5 PU (see note below)
DMX protocol:
ANSI E1.11 USITT DMX 512-A
Body material:
Powder coated aluminium
Body color:
Black (white option)
Mounting plate M8 Plus:
Optional fixing
