I have recently started at a new plant, and we use a lot of power flex 40 drives for conveyors. on my fiorst day they sent me to start a line armed with a heat gun to heat up drive. i was skeptical of this practice but after 5 mins or so the drive did power up. i am quite curious as to how this works. I've done it several times since. I am more curious about what i could do to fix this issue. experienced maintenace members here have all just said it's what we do. which drives me nuts