I built a 5' x 5' ball screw machine about 9 months ago and all has been working well, but the last few day when I first start it up I get sensor trip errors. I have to turn it on and off a few times before it starts working without the errors. After this is works fine all day. Could the cold be affecting the sensors? I live in NC and it's cold overnight (30's), but warms up throughout the day into the 50's or 60's usually.

Thanks,