Engage and tighten the three top and right attaching screws just finger tight. It is not necessary or desirable to use a wrench as the motor driving torque is quite low at the TTL's operating speed, and over-tightening can damage the screws or the camera. The attaching screw at the lower left can be left rather loose if there is clearance between the standoff post and the camera's threaded insert. The motor and camera are now ready for use. The TTL requires 12.6 volts DC for operation.
Current draw is quite low, suitable for long-term unattended operation on battery power.
Acceptable range is 11-14.4 volts. During exposure the starting current is briefly 500 to 800 mA and average current drain is under 70 mA using the TTL motor alone. If accessories are used, the current requirement will increase accordingly. To run from commercial AC power, a filtered and regulated DC power supply is required. For proper operation, the voltage must not sag below 11 volts with 800 mA drain, or rise above 14.4 volts with no load.