Mitsubishi Electric LX-005TD Instruction Manual page 6

(1) Make sure to use a self-aligned type bearing so that imbalances in the tension detecting roller, defective
unevenness in the sensor mounting surface, other machining errors, length change of the roller due to
temperature change, etc. will not be detected as tension.
To minimize the tension detecting error at the same time, keep machining error to a minimum.
The recommended imbalance of the tension detecting roller is class G1 to G6.3 of ISO 1940-1 (1986)
(depending on machine specifications).
(2) When supporting the tension detecting roller at both ends,
adjust the height of the detector mounting surface.
- The asterisked (*) portion should be the minimized in
order to reduce tension detect on errors.
- If the asterisked (*) portion is large, the material may wind
improperly, the bearing life may become shorter, the out-
put at the zero point may fluctuate, or other defects may
occur.
- When using a spacer for adjusting the height, use a spac-
er having a shape capable of covering the entire mount-
ing surface
(3) The resultant force of tension due to material angle should be settled within the recommended resultant
force range in the drawing with respect to the hinge position in order to keep the precision of tension
detection.
Tension
(4) If the detector bolt is loosened by mistake, the original characteristic is not restored if tightened again.
(5) When mounting the detector, be careful not to apply large impact load or excessive load, or admit cutting
chips, screws or other foreign matter.
In particular, pay attention to the following points to avoid impact or excessive load when mounting.
1) If fixed without using self-aligned bearing, abnormal load is applied in the event of eccentricity
or defective parallelism.
2) When the pillow block or roller is directly hit by hammer in order to adjust the parallelism be-
tween rollers.
3) When there is any person or object on the detecting roller.
4) When machine is transported after mounting the detecting roller, and vibration or impact is ap-
plied during transportation.
5) When the tension detector is dropped or transported without cushioning material.
(6) If using in environments accompanied by large temperature changes, employ a mechanism for absorb-
ing length changes due to temperature changes of the tension detecting roller so as not to affect the ten-
sion detecting precision.
Recommended resultant force range
resultant force
Hinge
Tension
Recommended resultant
force range
4
Tension detector
*
*