After I had my Amara "fried" during a thunderstorm power outage (I was in the basement and didn't hear the storm start), I was told by my vendor to buy a UPS. I actually contacted the manufacturer of the UPS to ask specifically which model I should purchase, and purchased the one they recommended. However, now there is discussion in the Handi Quilter group on Facebook that a UPS is not recommended, but should use a surge protector. I did have my Amara plugged into a good quality surge protector when that thunderstorm struck... In this support section, I found another post where a Handi Quilter owner's spouse who has some expertise in engineering/electronics said that we should have both a surge arrestor and a UPS (not sure which one we should plug into which). So, we Handi Quilter owners need some clear direction from Handi Quilter on what we actually need to protect our machines. I do not want to call for technical assistance as this needs to come to all of us direct from Handi Quilter, not just me. Hopefully, someone from Handi Quilter with the appropriate knowledge can weigh in, in the Facebook group as that may be the best way to reach a lot of us at once. I'm going to copy and paste the relevant sections of the Facebook post:
Here are some reasons for not using a UPS on the motor that drives your longarm:
1) The motor starting or "inrush" current draw during initial motor startup will most likely far exceed the capacity of consumer-oriented UPS units. For example, a 7-amp motor will draw up to 140 amps for about 120th of a second during startup. This can cause
problems for the longarm system motor controller card (may even damage the card) and may cause the motor to operate improperly. A slow-starting motor is an indication that the motor is not getting the required current when the motor first starts turning after
a stopped condition.
2) Most if not all consumer-oriented UPS units are designed to only support computer systems and typically create a square-wave output that is compatible with the switching power supplies on computer systems. Motors really require a sine wave output to function
properly. Check the websites of APC, Tripplite or any UPS manufacturer and they specifically state that they are not designed to be used with motors.
3) Even if you purchase a "pure sine wave" output UPS unit, then point number one still applies.
(a) use a surge protector on the portion of your system that controls the machine head motor.
(b) use either a surge protector or a UPS on the computer that hosts the computer-aided-design software. The UPS will give you a few minutes to perform an orderly shutdown of your computer without losing any of your work if and when a power outage occurs.
(c) unplug your system when not in use.
(d) don't use your system when there is thunder and lightning in the area.