19
Maintenance of the control unit
1.
Cleaning the outside
Turn off power to the unit and to the computer. Wipe down the outside of the box with a soft cloth.
2. Cleaning the inside
Turn off the power from the control unit and the computer. Remove the control unit
’
s electric cable
from the wall socket and the connecting cable between the computer and control unit before starting. Re-
move the cover of the control unit by lifting it upwards. Use a vacuum cleaner (a mini vacuum designed for
appliances) to gently remove the dust inside the unit.
3. Lubricating the slide bars
The metal slide bars inside the box need to be lubricated
every 6 months (more often with heavy use). Make sure
power cord and computer cable are disconnected, then
cover the electronic card in the box with a piece of card-
stock or light cardboard to protect it. Wipe the metal
slide bars clean with a dry cloth, then use a cotton swab
to spread a light amount of sewing machine or spinning
wheel oil on the bars. Do not put oil on the square bear-
ings on the bars. Be very careful so that the oil doesn
’
t
spread elsewhere.
4.
Periodically check the wingnuts and wedges to make sure they haven
’
t wiggled loose, espe-
cially after projects that take heavy beating. Tighten as needed.
