I have the SW AZEQ6 Pro, a few answers:
1. Power Requirements: A 10W power supply won't do at all, not even close. Watts = volts x amps, so that means its output is less than 1A, hopelessly inadequate. I quote from the manual, section 4.4:
"Output Voltage: DC 11V (minimum) to DC 16V (maximum). Voltage not in this range might cause permanent damage to the motor controller or the hand controller.
• Output Current: 4A for power supply with 11V output voltage, 2.5A for power supply with 16V output voltage.
• Do not use an un-regulated AC-to-DC adapter. When choosing an AC adapter, it is recom- mended to use a switching power supply with 15V output voltage and at least 3A output current.
• If the power voltage is too low, the motor controller will stop the motors automatically."
2. Current drawn
Most of the time the mount draws less than 1A tracking. But when slewing the peak current drawn is 4A (50 watts) so most of the small AC adapters simply are hopelessly underrated - including one that ships with some of these mounts. If the supply cannot provide 4A at 12VDC, the motors stall, making a high-pitched squealing sound.
The nominal voltage is 12V but in reality (from the manual) the mount accepts 11VDC..16VDC.
3. Powering your mount from the car is not recommended:
- the cable supplied with the mount is too far short in practice, and will have to be lengthened;
- used for any length of time on a cold night, you may find your car battery has been depleted to the point the car wont start, so you're stranded;
- if there is a short circuit, bear in mind there will be a fuse inline with the socket somewhere in the car wiring and it will blow.
- the cable poses a trip hazard, quite likely to break something if you do trip on it in the dark, or fall over.
- one core of the wiring is positive - if that ever breaks and touches the car body you have just formed a dead short circuit to the car battery.
if you have a modern car built in the last 5 years it almost certainly has some peculiarities, courtesy of the designers. My Mazda6 for example, when parked with ignition off, about 1 minute later it disables the power to the aux socket in the boot, the cigarette lighter socket in the front, and the USB ports - to protect the battery from being discharged by devices left in the car and forgotten (eg overnight). So no good for a scope.
4. Wiring for an SLA battery
The battery I use is a small 12V SLA, rated for 12Amp-hours commonly used for motorcycles or camping, nominal output 13.8VDC when fully charged, which is ideal. This is fine for a night, and weighs about 5kg. Note also that as batteries discharge the output voltage drops.
In my case the battery sits in a small wooden case under the tripod, along with red LED torch, a set of hex keys and other odds and ends that could be needed at the scope.
On the battery I made up a cable with crimp-lugs connecting to the battery, with a female car-cigarette socket at the other end so the plug as supplied with the mount fits this, perfectly.
For charging the battery, you will need a small battery charger (the battery supplier should be able to provide one) and I put a male plug on this matching the one on the mount, this means it plugs into the same pigtail and socket, so there is no risk of reversing the polarity when connecting the charger to the battery.
5. Fancy rigs
In a more complicated rig I would strongly suggest you have an inline 10A fuse to protect the battery in the event you short-circuit the wires anywhere; SLA batteries do not take kindly to that and can produce a huge current (welding the wires) and shortly afterwards the battery can explode, which is very hazardous (think hot concentrated acid spraying everywhere).
If you want to use a dew heater (requires maybe 1-2A), CMOS camera with cooling (another 4-5A) I would use a second small SLA battery to power these independent of the scope.
Some put all this together in a box with neat plugs and sockets for all the gear to connect to (including a charger), fuses , ammeter and voltmeter so you can check all is well at a glance.
Edited by luxo II, 17 January 2020 - 07:04 PM.