5-132
Maintenance and inspection procedures
5 Maintenance and Inspection
2) Make sure that the pulleys do not move while replacing the belt. If the timing pulley A <4> and B <5> position
relation deviates, the position could deviate.
3) Make marks on the timing belt <2> and timing pulleys <4> and <5> with a felt-tip pen as shown in the figure
above, so that the engagement of the timing belt <2> and timing pulleys <4> and <5> does not deviate.
4) Lightly loosen the following
motor plate fixing screw <1>. (Do not loosen too much.)
5) Loosen the nut fixing tension adjustment screw <3>. Loosen the tension adjustment screw <3>, and remove
the old belt.
6) Copy the marks onto the new timing belt. Make sure that both belts are tense when making the marks.
7) Align the new timing belt with the marks on the timing pulleys <4> and <5>, and install.
8) Turn tension adjustment screw <3>, and adjust the tension of timing belt <2>.
When the screw is turned to the right, the belt will be stretched, and when turned to the left, will loosen.
Adjust the belt tension slack to within the range as shown in Page 135, "(15) Timing belt tension".
Before the tension measurement, rotate the timing pulley at least three times in each direction so that the
timing belt fits in the pulley. Check the tension measurement method in Page 107, "(2) Timing belt tension
measurement".
If the belt is loosened too much when adjusting the tension causing it to come off the timing pulleys <4> and
<5>, or if the belt and pulley teeth engagement is deviated, the machine system's origin will deviate.
9) After adjustment fastens the fixing nut of tension adjustment screw <3>, and certainly fixes tension
adjustment screw <3>. Moreover, also fasten the
motor plate fixing screws <1> certainly (M4 screw: tightening
torque is 4.51 Nm). Improper tightening can cause the belt to loosen with vibration.
10) Install the No. 2 arm cover R securely as before.
11) Refer to Page 150, "5.6 Resetting the origin", and reset the origin position.
12) When the maintenance forecast function is valid, reset the accumulation data about the belt. Reset by the
dedicated screen or parameter MFBRST of RT ToolBox3. Refer to "RT ToolBox3/RT ToolBox3 mini User's
Manual" for operation of RT3 and refer to "Instruction Manual/Detailed Explanation of Functions and
Operations" for the parameter.
Model Motor plate fixing screw <1>
RV-4FR/7FR series, RV-7FRLL Two pcs.
RV-13FR/13FRL, RV-20FR series Three pcs.
To Next Page
Loading...
