To Next Page

To Previous Page

< 8. Maintenance >

8-8

IM 12F5A1-01E

the lengthwise direction.

(10) Place a plate that prevents friction dust from entering the electrode holder. With the two

bumpsontheplatefacingdown,passtheplateunderthedrivenshaftandindexthetwo

bumps with the two holes in the plate mounted in step (11). Then, as a temporary measure,

loosely tighten the two screws that hold it in place.

(11) Mount the rotating contact on the driven shaft.

(Note) The driven shaft and rotating contact need to be in contact and make a good electrical connection, so make sure

thattheyareclean.However,adherehceoflubricantfortherotatingcontacttothesurfacedoesnotinterferewiththe

peformance.

(12) With the drive belt mounted, attach pulleys to the drive shaft and driven shaft.

 (Note) Installthedriveshaftpulleysothatthetipoftheshaftcanprojectout0.3to0.7mmfromendoftheshaft,sothatdrive

belt becomes horizontal.

(13)Whileadjustingthedrivebelttension,furthertightenthescrewsthatweretightened

temporarily in steps (9) and (10).

SetthespringplateandthebelttensionadjusterplateasFigure8.6shows.

 Hangthehookofaspringbalance(1.00kg)ontheholeinthedrivenshaft.Makesurethat

all the temporarily tighten four screws are loose.

Draw the drive belt horizontally in the direction of the line that connects between the drive

shaft and the driven shaft, by a force of 4 N (spring balance reading of 0.4 kgf). With this

tension kept, tighten the screws completely.

 Fastenthescrewstosetthefrictiondustprotectionplate.Afterthescrewsarexed,remove

thebelttensionadjuster.

Rotating contact

Pulleys

spring plate hook

adjuster plate

Figure8.6 Setupofbelttensionadjustment

(14) Mount indicator electrode on driven shaft, and check that indicator electrode is not

contacting the base.

(Note) If the indicator electrode is contacting the base, or if the hole in the center of the base and the center of the indicator

electrodearenotaligned,loosethefourscrewsonthemotormountingbaseandadjust.

(15) Remountcounterelectrode,reconnectwiringinplace,andxclamp.

This completes the replacement procedure. Feed power to FC400G. Check that the drive

shaft/drive belt/driven shaft rotates smoothly and there is no abnormal noise like vibration or

intermittent sound.

YOKOGAWA FC400G User Manual

Questions and Answers: