Maintenance and inspection procedures 5-127
6) Loosen the nut fixing tension adjustment screw <3>. Loosen the tension adjustment screw <3>, and remove
the old belt.
7) Copy the marks onto the new timing belt. Make sure that both belts are tense when making the marks.
8) Align the new timing belt with the marks on the timing pulleys <4> and <5>, and install.
9) 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
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.
10) After adjustment fastens the fixing nut of tension adjustment screw <3>, and certainly fixes tension
adjustment screw <3>. Moreover, also fasten the two
motor plate fixing screws
<1> certainly (M4 screw: tight
-
ening torque is 4.51 Nm). Improper tightening can cause the belt to loosen with vibration.
11) Stick the adhesive side of heat conduction sheet A to the J3 axis motor. If the heat conduction sheet A is
damaged, please replace it.
12) Install the No. 1 arm cover L and No.1 arm cover U securely as before.
13) Refer to
Page 150, "5.6 Resetting the origin"
, and reset the origin position.
14) 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.
Fig.5-20 ： Heat conduction sheet position
■ Replacing the J3 axis timing belt (RV-7FR series)
If the timing belt of the J3 axis is removed, the forearm will drop by the self-weight.
And, if the positional relation between the timing pulley A <4> and B <5> deviated, it
will become the cause of the position deviation. For the safety before replacing the
timing belts, hit the J3 axis against mechanical stopper with releasing brake.
It is possible for the customer to replace the timing belt, but precise adjustment is
needed to prevent malfunction of the relevant parts. To ask for replacement of the
timing belt, contact the dealer.
1) Refer to
Page 100, "5.3.2 Installing/removing the cover"
, and remove the No. 1 arm cover L.
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
so
that the engagement of the timing belt <2> and timing pulleys <4> and <5> does not deviate.
㻵㼚㼟㼕㼐㼑㻌㼛㼒㻌㼠㼔㼑㻌㻺㼛㻚㻝㻌㼍㼞㼙㻌㼏㼛㼢㼑㼞㻌㻸
㻵㼚㼟㼕㼐㼑㻌㼛㼒㻌㼠㼔㼑㻌㻺㼛㻚㻝㻌㼍㼞㼙㻌㼏㼛㼢㼑㼞㻌㼁
㻴㼑㼍㼠㻌㼏㼛㼚㼐㼡㼏㼠㼕㼛㼚㻌㼟㼔㼑㼑㼠㻌㻭
㻴㼑㼍㼠㻌㼏㼛㼚㼐㼡㼏㻙
㼠㼕㼛㼚㻌㼟㼔㼑㼑㼠㻌㻮
㻔㻾㼂㻙㻠㻲㻾㻸㻌㼔㼍㼟㻌
㼚㼛㼠㻌㼠㼔㼕㼟㻌㼟㼔㼑㼑㼠㻚㻕
CAUTION
CAUTION
