Disassembly & Reassembly - Nidec RINDCODE NRX Series Instruction Manual

6 Disassembly & Reassembly
If problems or malfunction have occurred in the unit, and disassembly inspection is required, refer to the disassembly and reassembly figures on the following
pages, and perform accordingly (refer to " 5 Troubleshooting" on page 11).
Note : Since models larger than the medium-scale type (1.5 kW type), and those equipped with the reducer have heavy parts, hoist or crane equipment may be required at the time of disas-
sembly and reassembly.
Note : When disassembly and reassembly are performed by our workers, please have your company remove and mount the speed drive.
6-1 Disassembly procedure
(1) Remove the plug from the oil drain port, and drain oil completely.
(2) Remove the top cover.
(3) Remove the output shaft assembly from the main unit.
(4) Remove the cam assembly from the output shaft assembly.
(5) Remove the cone assembly.
(6) Remove the ring assembly.
(7) Remove the input disc from the motor shaft.
・ Inspection & Washing
・ After disassembly, inspect each part, and wash all parts with washing oil.
・ Replace defective parts with normal ones.
Keep all disassembled parts away from dust
until reassembly.
6-3 Shim (pressure contact force) adjustment
● Since shim (pressure contact force) has been sufficiently adjusted at shipping, readjustment is not necessary before use.
When disassembly and reassembly have been performed due to unavoidable circumstances, readjust shim according to the following procedure.
NRX □
*For models with the reducer, refer to the respective page.
● Adjustment procedure
When reassembly is complete after disassembly, in order for the "automatic pressure adjustment mechanism" to function effectively, adjust pressure
contact force using the shim inside the bearing cover.
･When reassembling the speed change section, move the ring to the low speed end (output shaft) in advance.
● Procedure
(1) Tighten the bearing cover completely.
(2) Mount a pulley on the output shaft, and manually turn the pulley from side to side to seat internal parts.
NRX □ -200B/400B
NRX □ -750 to 2200
Adjust by output shaft backlash
(3) When turning the pulley from side to side, check that output shaft
backlash is within the range of values in the table below.
If backlash is too large or small, remove the bearing cover, and
adjust to the normal value by increasing or decreasing the shim
(0.1 mm to 0.2 mm thick).
Model
200B/400B
750/1500
After adjusting to 1º to 3º,
2200
1° to 3°
(4) When shim (pressure contact force) adjustment is complete,
mount the top cover, and set the dial.
Under no load, align the mating mark with 0 (zero) for
NO LOAD on the dial, and tighten using the bolt.
Output backlash
1° to 3°
add a shim 0.2 mm thick.
Shim
6-2 Reassembly procedure
● Perform reassembly in the reverse order of disassembly.
● Put packing in joint parts between the M flange/output shaft holder/motor and the
main unit housing/covers. In such cases, replace deformed or cracked packing with
normal one.
* When reassembly is complete, adjust pressure contact force inside according to
"6-3 Shim (pressure contact force) adjustment" .
NRX □ -3700 to 18K
Adjust by clearance between the cam disc and input cam
(3) Remove the top cover.
(4) Look into the inside of the main unit, and check that clearance between the
cam disc and input cam is within the range of values in the table below.
If clearance is too large or small, remove the bearing cover, and adjust to the
normal value by increasing or decreasing the shim (0.1 mm to 0.2 mm thick).
Model
Adjust clearance to 0 to 0.1 mm, and add a
3700 to 18K shim 0.1 mm to 0.15 mm thick (0.05 mm to 0.1
mm thick when applying pressure).
Clearance
Cam retainer
Cam disc
Input cam
(5) When shim (pressure contact force) adjustment is complete, mount the top
cover, and set the dial.
Under no load, align the mating mark with 0 (zero) for NO LOAD on the dial,
and tighten using the bolt.
12
Clearance of the cam disc
Shim