HENLI SUPPORT INTERACTIVE PARTS REFERENCE
Air feeder parts explorer
Match a symptom to the parts worth checking, watch a repair example, or ask our team for help.
FROM A SYMPTOM TO A COMPONENT
Air feeder symptoms: which parts should you check?
Start with what the pneumatic air feeder is doing, then use the numbered links to locate the areas discussed in the 3D assembly. These are possible causes and review pointsโnot a remote diagnosis. A feed interruption does not, by itself, prove that a valve, clamp or seal needs replacement.
Air feeder not feeding or slide block not moving
The cycle is requested, but the moving carriage does not advanceโor the clamp moves while the carriage stays still.
- Possible causes
- The command or air supply may not reach the actuator; a valve may not switch, or the carriage may be obstructed. A mechanical-trigger unit and a solenoid-controlled unit need different signal checks. The solenoid is not shown in this reference model.
- Check & next step
- Identify which motion is missing. Have maintenance verify the correct trigger and available air supply before opening the feeder. After isolation, inspect the accessible carriage path for obstruction. Correct a verified supply or trigger fault first; inspect or replace valve/cylinder components only after the fault is localized.
Related case: not feeding, part 1 and part 2. Read the machine-level troubleshooting guide.
Material slipping or inconsistent feed length
The carriage travels, but the strip advances too little, inconsistently, or differently from the intended feed pitch.
- Possible causes
- Worn or contaminated gripping surfaces, unsuitable clamping conditions, changing air supply or excessive strip resistance may allow slip. If the strip moves backward during return, include the fixed clamp in the review. A disturbed stroke setting can also change feed length; pitch error alone does not identify a damaged clamp.
- Check & next step
- Compare carriage travel with actual strip movement using the approved test method. Review the recorded stroke setting, clamp condition, coil drag and die-entry resistance. Clean and set contact components using the applicable procedure; replace confirmed worn gripping parts with matched replacements. Do not improvise surface grinding or simply increase pressure to mask the cause.
Watch the leakage, clamp and slipping case. Its modifications are not a universal repair method. For the broader line checks, see common pneumatic feeder problems.
Air feeder carriage not returning or returning slowly
The feeder advances but stops before returning to its starting position, or its return takes longer than expected.
- Possible causes
- The return command, valve switching, restricted exhaust, mechanical resistance or the fitted cushioning arrangement may need attention. First distinguish a commanded dwell from a failed return stroke.
- Check & next step
- Record where the carriage stops and which cycle phase is affected. A technician should verify the return signal and the actual flow/cushion configuration, then inspect the isolated guide path. Correct the identified obstruction or control fault; service a confirmed restricted flow component to specification. Do not bypass cushioning, block exhaust ports or force the carriage.
The exhaust fitting locates a flow-path area; it is not a universal cushion adjuster. See return motion and cushion checks or send HENLI the affected cycle stage.
Continuous air leakage at a fitting, valve or cylinder
Air escapes continuously, or an unusual leak appears only during feed, clamping or return.
- Possible causes
- A damaged tube or fitting, worn valve sealing element or actuator seal can leak. Some air discharge is normal during valve operation, so the sound alone does not prove a failed seal. The links below identify inlet and connection areas; they do not show every internal seal.
- Check & next step
- Record the location and cycle phase from a safe position. Qualified maintenance should distinguish normal exhaust from abnormal leakage using the approved leak-test method. After isolation and depressurization, replace or reseal only the confirmed leaking connection/component with compatible parts. Persistent valve or cylinder leakage requires model-specific service; never plug an exhaust to stop the sound.
Watch the air-leakage service case and read the leakage checks before replacement.
Slow, jerky or sticking carriage and clamp movement
Motion becomes uneven or weaker, especially as production demand rises. Identify whether the carriage, moving clamp or fixed clamp is affected.
- Possible causes
- Insufficient air volume, supply pressure falling during a cycle, contamination, guide wear or unsuitable flow settings may contribute. A problem that appears only at production speed can involve the supply or cycle timing rather than a broken component.
- Check & next step
- Have maintenance compare the air supply under the agreed operating condition with the machine requirement. Inspect isolated guides and accessible contact points for contamination or wear. Restore approved air preparation and model-specified cleaning/lubrication, then reassess. Replace verified worn components as required; do not compensate for binding by raising pressure or turning every speed screw.
The screw is a location reference, not an adjustment instruction. Use the reduced-speed troubleshooting checks and the air feeder maintenance checklist.
Clamp marks or scratches on the material surface
New pressure marks or scratches appear on the strip after it passes through the feeding line.
- Possible causes
- Contamination, damaged contact surfaces, unsuitable clamp conditions or strip misalignment may mark the material. Damage may also originate at the decoiler, another guide or the die; proximity to the feeder does not establish the source.
- Check & next step
- Compare the incoming surface with the affected strip and record where the marks first appear. Inspect the isolated rollers and clamp faces, then correct confirmed contamination or alignment problems using the approved procedure. Replace damaged contact parts after matching the model. Review contact configuration for surface-sensitive stock; do not grind clamp faces or reduce grip without verifying feeding performance.
Read the material-path and clamp checks, or ask HENLI to review the marks and material details.
Before choosing a replacement: 3D numbers identify components in this reference assembly, not ordering codes. Share the actual model/nameplate, material, feed pitch, operating condition and a safe record of the symptom. The linked HENLI guides provide the broader checks; the component links above help locate the areas under discussion. They are not ranked failure probabilities.
How to use this reference ยท model scope & safety
- Explore. Rotate, zoom, expand or collapse the assembly. Click the model or parts list to view a componentโs English reference details.
- Choose an area. Add useful part references to your request. If you cannot identify the part, leave the selection empty.
- Describe the symptom. Tell HENLI what happens, when it starts and what changed beforehand. Selecting a component does not confirm a failure or authorize replacement.
Reference scope: These are 103 CAD components from a 3C reference assembly, not universal replacement order codes. Some manual references are unconfirmed. HENLI must match the reference to your actual model and configuration.
Before physical inspection: Follow the machineโs isolation procedure, isolate the press and air supply, and release stored pneumatic energy as prescribed. Keep clear of clamps and moving parts. Repairs and recommissioning require qualified personnel and the applicable instructions.
THE SERVICE LIBRARY
Watch the relevant repair or setup
Examples from particular machinesโnot a diagnosis of yours. Match the configuration before applying any procedure.
REPAIR CASE ยท PART 1
Not feeding: investigate
Initial checks in an unresolved case. Continue with part 2.
REPAIR CASE ยท PART 2
Not feeding: finish the case
The continuation shows recovery. Watch together with part 1.
REPAIR CASE
Leakage, slow clamp & slipping
A service case with linked symptoms. Modifications shown require case-by-case review.
INSTALLATION
Mechanical-valve feeder setup
Installation and an unloaded check for the demonstrated actuation method.
INSTALLATION
Reinforced feeder installation
Mounting, air connections and an unloaded checkโnot terminal wiring or a loaded-accuracy test.
ASK THE HENLI TEAM
Share the symptom. Weโll review it.
Describe the issue and include your model or nameplate details if available. Selected references travel with your request. A HENLI specialist will reply by emailโno automated diagnosis.
BEFORE ORDERING A REPLACEMENT
Match the part to your machine
Appearance alone does not confirm compatibility. Share your model, nameplate and part markings; HENLI may ask for photos or measurements before recommending a replacement.
EQUIPMENT INFORMATION
Looking for an air feeder configuration?
Compare the HENLI pneumatic air feeder range and discuss the configuration for your material and press.
