"Tom Miller" wrote in message ...

"N_Cook" wrote in message
...
On 18/02/2016 16:46, Snuffy "Hub Cap" McKinney wrote:
I'm looking at adding a resistor or bulb inside an Acorn stair lift motor
housing to keep the temperature about 40degF. The unit is in an unheated
area and temps get too low for the motor to turn normally. I considered
an electric blanket or pad but having an elderly person messing with
something on the stairs is not a good idea. Also, there's the issue of
having a separate part and cord to deal with.

Check this out and post some comments what you think. I have done this
when setting up electronic devices in remote locations, installed in an
insulated box with a car battery & resistor. In this case a night light
bulb might be another choice.

Sketch
http://i67.tinypic.com/t9jmac.gif
http://oi67.tinypic.com/t9jmac.jpg


What happens if the room is cold and you selectively heat only the
bearings/gear box with hot air?

Is it the motor that is the problem or the batteries? The way I read this is
the batteries are the problem. A PTC heater and some good insulation would
seem to be the better answer.

The heat would be for the lubrication in the motor and gears. Heat for battery is not needed.

Thanks everyone.