Epson Stylus Pro 4900 - Cutter Belt Tension Check

Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
ADJUSTMENT Media Feed Related Checks and Adjustments 381
Confidential
4.13.9 Cutter Belt Tension Check
REQUIRED TOOLS
 Sonic Tension Meter U-507
 Any tools to flip the timing belt
STANDARD VALUE
 13 to 19.5 N
PROCEDURE
1. Remove the following parts in advance.
 Front Cover (P. 142)
 Right Upper Cover (P. 138)
 Control Panel Cover (P. 136)
 Left Cover (P. 137)
 Media Eject Cover (P. 148)
 Upper Front Cover (P. 134)
2. Confirm that the cutter is at the home position.
3. Input the following values to the tension meter.
 MASS: 001.1 g/m
 WIDTH: 004.0 mm/R
 SPAN: 0620 mm
4. Bring the microphone of the Sonic Tension Meter U-507 closer to the position
shown in Figure 4-90.
5. Press [MEASURE] on the Sonic Tension Meter U-507 and flip the belt with
tweezers or a similar tool.
6. Measure the belt tension for three times, and check if the average is within the
standard value.
 Within the standard value: Go to Step 11
 Out of the range: Go to Step 7
Figure 4-90. Cutter Belt Tension Check
C A U T I O N
 Be sure to measure the tension of the belt on the upper side. If
you measure the tension of the belt on the lower side, the
measuring value may be inaccurate.
 Flip the belt as weak as the Sonic Tension Meter U-507 can
measure it.
 Be careful not to let the microphone touch the belt when
flipping the belt.
C H E C K
P O I N T
Bring the microphone within 5 mm from the belt but do not let it
touch the belt.
Measuring microphone