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Brother PR655 Service Manual

Brother PR655
341 pages
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3 - 62
Thread wiper unit
Main unit
Assembly
Assembly
1 Wiper set assembly
1. Attach the wiper motor assembly 2 to the wiper base assembly 1 with
the 2 screws 1.
2. Attach the wiper link assembly 4, washer 8, and the plain washer (M5)
9 to the wiper lever 3, and then attach the retaining ring E4.
3. Attach the wiper lever assembly, and plain washer (M6) 0 to the wiper
base assembly's shaft, and then attach the retaining ring E4.
*Key point
• Align the mark 5 on the wiper motor's gear with the mark on
the wiper lever assembly.
4. Attach the wiper hook 8 to the wiper link with the wiper shoulder screw
6, spring washer (2-4) A, and the nut (3, M4) 7.
5. Paint the wiper motor assembly's connector blue.
Tightening torque of nut (3, M4): 1.18 - 1.57 N-m
1
Torque
0.78 — 1.18 N-m
3
8
9
4
7
A
8
6
0
Retaining rings E4
5
11
2
Screw, Pan
M3X4

Table of Contents

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Brother PR655 Specifications

General IconGeneral
Number of Needles6
Built-in Designs25
USB PortYes
LCD DisplayYes
TypeEmbroidery Machine
Built-in Fonts28
Maximum Speed1000 stitches per minute
Embroidery Area300mm x 200mm

Summary

2. Disassembly

Main Unit Disassembly

Covers disassembly procedures for the main components of the machine.

3. Assembly

Main Unit Assembly

Covers assembly of the primary structural and external parts.

4. Adjustment

Adjustment Procedures

Procedures for adjusting critical machine parameters.

Input Needle Bar Data for Adjustment

Process for inputting specific needle bar data for calibration.

Motor Belt Tension Adjustment

Procedure for adjusting the tension of the main motor drive belt.

Timing Belt Tension Adjustment

Procedure for adjusting the tension of the timing belt.

Needle Drop (Front/Back) Adjustment

Adjustment for the needle's front-to-back position relative to the plate.

Needle Position (Left/Right) Adjustment

Adjustment for the needle's left-to-right position relative to the plate.

Needle Bar Rising and Needle Clearance

Adjustment for needle bar height and clearance with the rotary hook.

Needle Bar Height Adjustment

Procedure for setting the correct vertical position of the needle bar.

Rotary Hook Stopper Clearance Adjustment

Adjustment for the clearance between the rotary hook stopper and the hook.

Presser Foot Height Adjustment

Procedure for setting the correct height of the presser foot.

Needle Bar Top Dead Center Adjustment

Adjustment for the needle bar's highest position relative to the top dead center plate.

Needle Threader (Up/Down) Adjustment

Adjustment for the vertical movement of the needle threader mechanism.

Needle Threader (Left/Right) Adjustment

Adjustment for the horizontal movement of the needle threader mechanism.

Y Belt Tension Adjustment

Adjustment for the tension of the Y-axis belt.

X Belt Tension Adjustment

Adjustment for the tension of the X-axis belt.

Picker Activation Adjustment

Adjustment for the proper activation of the picker mechanism.

Movable Knife Initial Position

Setting the initial position of the movable thread cutting knife.

Thread Presser Base Up/Down Position

Adjusting the vertical position of the thread presser base.

Hoop Sensor (A/D Value) Calibration

Calibrating the hoop sensor by adjusting its A/D values.

X, Y Carriage Initial Position Setting

Setting the home or initial position for the X and Y carriages.

Movable Knife and Fixed Knife Engagement Load

Adjusting the force required to engage the movable and fixed knives.

5. Failure Investigation for Electronic Parts

Troubleshooting: Power Not Turning On

Troubleshooting steps when the machine does not power on.

Troubleshooting: Touch Panel Not Working

Troubleshooting steps when the touch panel is unresponsive.

Troubleshooting: Panel Switch Not Working

Troubleshooting steps when panel switches are not functioning.

Troubleshooting: Needle Bar Not Moving Normally

Troubleshooting steps when the needle bar movement is abnormal.

Troubleshooting: Thread Breakage Detection Failure

Troubleshooting steps when the thread breakage sensor fails.

Troubleshooting: Hoop Not Moving Normally

Troubleshooting steps when the embroidery hoop movement is abnormal.

Troubleshooting: Main Shaft Not Rotating Normally

Troubleshooting steps when the main shaft rotation is abnormal.

Troubleshooting: Thread Not Cutting Normally

Troubleshooting steps when the thread cutting mechanism fails.

6. Maintenance & Replacement

Component Replacement

Procedures for replacing major machine components.

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