Pf Timing Belt Tension Adjustment; Chapter 4 Disassembly & Assembly - Epson Stylus Pro 4400 Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880C

5.2.2 PF Timing Belt Tension Adjustment

This adjustment applies to all operations that have loosened the PF Timing
Belt, such as "Motor Assy., PF" removal. This adjusts the belt tension to the
correct tension after installation of the "Motor Assy., PF"
Tools (Required)
Sonic Tension Meter U-505
A tool to pluck the timing belt (tweezers, etc.)
Utility Tools (Adjustment possible without these)
Code Type Microphone (U-505)
Standard Value
Standard: 17.6 ~ 21.6N
Procedure
Pay attention not to deform or damage the "Scale, PF"
C A U T I O N
attached to the "Pulley, Roller, PF" when performing the
following work.
1. Input the following belt information into the tension measurement tool.
Weight: 1.3
Width: 6.0
Spam: 47
2. Bring the measurment microphone of the tension meter close to the
center of the timing belt (between the "Motor Assy., PF" pinion gear
and the PF roller pulley).
Set the tension meter fixed tool in a position so the distance
C H E C K
P O I N T between the measurement microphone and timing belt is
within approximately 5mm but not touching the timing belt.
Adjustment
3. Press the MEASURE button on the tension measurement tool and
measure by plucking the timing belt with a tool such as tweezers.
Pluck the belt as gently as possible so it can be
C A U T I O N
measured by the tension measurement tool.
Do not allow the measurement microphone and timing
belt to make contact when the belt is plucked.
measurement microphone
Figure 5-6. Setting the Tension Measurement Tool
Mechanical Adjustment
within 5mm
within 5mm
Revision C
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