What is the JH-02A operator’s guide?
The JH-02A is a fully automatic double-end crimping and single-end tinning machine for AWG#32 to AWG#18 electronic wire. Proper operation and regular maintenance directly impact production output, defect rates, and machine lifespan. This guide provides six essential tips for operators and maintenance technicians.
Tip 1: How to correct stripping abnormalities
Problem: No blade mark on insulation
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Solution: Increase stripper blade depth value (range 1-100, adjust in increments of 5)
Problem: Wire is cut through
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Solution: Decrease blade depth value (reduce by 3-5 points)
Problem: Insulation does not pull off
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Solution: Adjust wire clamp pressure or increase air pressure to 0.5-0.7MPa
Parameter reference table:
| Wire gauge | Blade depth (typical) | Strip length range |
|---|---|---|
| AWG#18 | 45-55 | 3-11mm |
| AWG#22 | 35-45 | 2-11mm |
| AWG#26 | 25-35 | 1-11mm |
| AWG#30 | 15-25 | 1-11mm |
Tip 2: How to fix tinning defects
Problem: No solder adheres to wire
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Solution: Verify flux level in flux tank. Check flux dipping angle.
Problem: Incomplete solder coverage
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Solution 1: Increase tinning depth parameter (0.1mm increments)
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Solution 2: Increase dwell time (0.1 to 0.5 seconds for fine wires)
Problem: Solder wicking up the insulation
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Solution: For AWG#28 and finer, set dwell time to 0.2-0.3 seconds maximum
Tinning parameter reference:
| Wire gauge | Dwell time (seconds) | Cooling time (seconds) |
|---|---|---|
| AWG#18-20 | 0.8-1.2 | 0.8-1.0 |
| AWG#22-24 | 0.5-0.8 | 0.5-0.7 |
| AWG#26-28 | 0.3-0.5 | 0.3-0.5 |
| AWG#30-32 | 0.1-0.3 | 0.3-0.4 |
Tip 3: How to resolve twisting abnormalities
Problem: No twist or very loose twist
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Solution: Increase partial strip length to 4-6mm. Increase twisting speed to 5-7 (range 1-9).
Problem: Broken strands after twisting
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Solution: Decrease twisting blade depth by 3-5 points. For AWG#28 and finer, set twisting speed to 3-5.
Problem: Twisted length is inconsistent
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Solution: Verify wire clamp pressure. Clean clamp surfaces to remove insulation residue.
Tip 4: How to fix terminal crimping defects
Problem: Crimp is off-center
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Solution: Adjust crimp position offset parameter (range -5.0mm to +5.0mm)
Problem: Insulation crimp is too tight
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Solution: Decrease crimping depth parameter (reduce by 2-5 points)
Problem: Insulation crimp is too loose
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Solution: Increase crimping depth parameter (increase by 2-5 points)
Crimp inspection method:
Measure crimp height with a micrometer. Acceptable tolerance is ±0.05mm compared to terminal manufacturer specification.
Tip 5: Daily and weekly maintenance checklist
Daily maintenance (every 8 hours):
| Task | Time |
|---|---|
| Remove insulation scraps with compressed air | 2 minutes |
| Clear terminal scrap from collection bin | 1 minute |
| Verify air pressure is 0.5-0.7MPa | 30 seconds |
| Check solder pot and flux levels | 2 minutes |
| Clean touchscreen | 30 seconds |
Weekly maintenance (every 40 hours):
| Task | Time |
|---|---|
| Lubricate ball screws and linear guides (Hiwin rail oil) | 5 minutes |
| Lubricate pneumatic cylinders (Airtac pneumatic oil) | 2 minutes |
| Clean infrared and fiber optic sensors | 3 minutes |
| Inspect stripping blades for wear | 5 minutes |
Monthly maintenance (every 160 hours):
| Task | Time |
|---|---|
| Replace worn stripping blades | 10 minutes |
| Clean electrical cabinet with compressed air | 5 minutes |
| Backup machine parameters to USB drive | 2 minutes |
Tip 6: Common alarm conditions and responses
| Alarm | Cause | Response |
|---|---|---|
| Wire missing | Wire reel empty or wire broke | Load new reel. Re-thread wire. |
| Wire knot detected | Wire tangled on reel | Remove tangle. Cut out twisted section. |
| Air pressure low | Compressor off or air leak | Set regulator to 0.6MPa. Check fittings. |
| Terminal missing | Terminal reel empty or jam | Load new reel. Clear applicator jam. |
| Bad rate exceeded | Continuous defects | Stop. Find root cause. Clear after correction. |
Alarm response procedure:
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Read alarm message on touchscreen
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Press stop button
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Correct the root cause
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Press alarm reset
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Run 5-10 test pieces and verify quality
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Resume production
What spare parts should be kept in inventory?
| Part | Typical lifespan | Minimum stock |
|---|---|---|
| Stripping blades (set of 4) | 100,000-200,000 cycles | 1 set |
| Cutting blade (set of 2) | 200,000-300,000 cuts | 1 set |
| Feed rollers (pair) | 500,000 cycles | 1 pair |
| Timing belts | 1-2 years | 1 set |
| Crimp die set | 500,000-1,000,000 crimps | 1 set |
| Flux | As needed | 1 liter |
| Solder bar | As needed | 5 kg |
What is the warranty?
JUHAI provides a 12-month warranty on the JH-02A complete machine. Consumable parts (blades, feed rollers, belts, dies) are excluded. The warranty does not cover damage from incorrect operation or unauthorized repair.
How to get technical support?
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Remote support: Video call troubleshooting available
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Spare parts ordering: Contact sales with machine serial number
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Software upgrades: Free for life of machine