Yes, I know, but the shutter generally won't need to be moved, and ongoing azimuth adjustments are small, rather than (potentially) having a long run for initial positioning.
How much current do your dome motors pull?
The shutter motors run on DC. The upper door motor runs off an 8 amp power supply, and it doesn't blow the fuse. The maufacturer's spec sheet says 7.2 amps at 135 inch-lbs torque. I know it runs well below that torque, because the shutter cable will snap at 90 inch-lbs. (Ask me how I know!) So probably 3-4 amps, maybe even less
The rotation motor is a stepper, which runs off a 5 amp power supply, again without blowing the fuse. It is harder to measure the current draw of a stepper. It ramps up in speed when it starts, so it avoids the hard start of a DC motor. Less transients that way, which is good since it has to operate during the session.
Transients happen during starting and stopping. A long run will only have two transients, whereas the micro-slews of tracking will cause two every few minutes.
Edited by kathyastro, 22 May 2021 - 05:54 PM.