Manual cleaning can introduce variation
- Inconsistent coverage across fine areas of a stencil
- Uncertain wash and dry timing from one shift to another
- More direct handling around cleaning liquid and residue
SMT Stencil Cleaning Solution
S-1688 Pneumatic Stencil Cleaning Machine
All-pneumatic stencil cleaning with 360° double-sided rotary spray, compressed-air drying and filtered liquid circulation—built for repeatable SMT stencil maintenance.
750 × 750 mmMaximum stencil size
40 LLiquid tank capacity, max.
360°Double-sided rotary spray
0.5–0.7 MPaCompressed-air supply
Purpose-built for SMT
Keep the cleaning step controlled, enclosed and practical.
The S-1688 is an all-pneumatic stencil cleaning platform for electronics manufacturing teams that need to clean solder paste stencils, screens and related red-glue process tooling between production runs. Its cleaning and drying stages are designed as one enclosed, timed workflow.
Discuss your stencil construction, soil type and cleaning chemistry with Southern Machinery before final configuration and operating setup.
SMT solder paste stencilsRoutine cleaning for production stencil maintenance.
Screens and stencilsFor compatible screen and stencil cleaning requirements.
Red-glue related toolingProcess-dependent cleaning applications subject to material compatibility.
Electronics manufacturingA stand-alone cleaning station for suitable SMT process areas.
Why automatic stencil cleaning
Replace variable hand cleaning with a defined process.
Manual methods can be useful for small tasks, but they rely on operator technique and can make timing, coverage and solvent handling harder to standardize.
A timed enclosed cycle supports consistency
- Double-sided rotary spray coverage inside the chamber
- Separate cleaning and air-blow drying stages
- Filtration before liquid recirculates through the process
Machine capabilities
Focused functions for stencil cleaning operations.
Features below describe the available machine architecture. Final process settings, cleaning liquid and operating procedures should be confirmed for the application.
All-pneumatic cycle
Cleaning and drying actions are driven by compressed air, with mechanical/pneumatic time control.
360° rotary spray
Double-sided rotary nozzles direct cleaning liquid across both sides of the loaded stencil.
Integrated air drying
Compressed-air blow drying follows the wash stage in the enclosed chamber.
Liquid circulation
Filtered cleaning liquid is circulated in a closed-loop process rather than used as a one-pass flow.
Multi-stage filtration
Mesh, filter bag and fine filter element stages address different residue sizes in the liquid path.
SUS304 wet-side parts
Documented stainless-steel construction is used for key liquid-contact machine components.
Adjustable wash pressure
Operators can set cleaning pressure according to the approved process requirement.
Door interlock architecture
A pneumatic safety interlock component supports controlled access to the cleaning chamber.
How it works
One loading sequence. Two timed treatment stages.
The normal workflow moves from loading through wash, dry and removal. Verify timing and cleaning-liquid selection with the final operating procedure.
Load stencil
Place a compatible stencil in the chamber fixture.
Close door
Close the chamber before starting the timed sequence.
Wash
Rotary nozzles spray cleaning liquid on both sides.
Air dry
Compressed air blows the stencil dry after cleaning.
Remove stencil
Open after the cycle and complete the approved inspection.
Working principle
Compressed air powers the liquid and air paths.
Compressed air drives the pneumatic diaphragm pump and supports the wash and drying cycle. Cleaning liquid travels through the filtration path and rotary spray system, then returns for recirculation. Air drying is completed with a separate compressed-air blow stage.
This diagram is a functional overview, not a piping and instrumentation drawing.
1Compressed airSupplies the pneumatic system.
2Diaphragm pumpMoves cleaning liquid through the wash path.
3FiltrationStages separate residue before recirculation.
4Rotary spray rodsDirect liquid across both stencil sides.
5Stencil chamberEnclosed cleaning and drying zone.
6Return + air dryLiquid returns; compressed air completes drying.
Dedicated filtration system
Three filtration roles in the recirculation path.
Filtration is specified as part of the machine process. Service intervals depend on actual residue loading, cleaning liquid and use frequency.
Stage 1
1 mm mesh filter
Specified to protect the pump from larger debris in the liquid path.
Stage 2
20 μm filter bag
Specified for filtration of solid particles collected during cleaning.
Stage 3
1 μm filter element
Specified for fine filtration of solder-paste or red-glue residue.
Cleaning and drying
Clear separation between wash and dry functions.
The current S-1688 specification lists a 2–5 minute clean time and 2–5 minute dry time for solder paste stencils.
Cleaning stage
- 360° double-sided rotary nozzle liquid spray
- Enclosed chamber treatment
- Cleaning pressure set for the approved process
- Specified clean time: 2–5 min for solder paste stencil
Drying stage
- 360° double-sided rotary nozzle compressed-air blow dry
- Separate timed drying step after washing
- Use the recommended exhaust connection for the installation
- Specified dry time: 2–5 min for solder paste stencil
Simple operating process
Set the approved process, then let the timed sequence run.
01
Check the system
Confirm the installation, compressed-air supply and cleaning-liquid condition before use.
02
Load the stencil
Place the compatible stencil in the chamber and secure it as instructed.
03
Set wash and dry times
Use timings approved for the stencil, residue and cleaning-liquid process.
04
Close and start
Close the door and start the machine according to the operating manual.
05
Inspect and maintain
Remove only after the cycle, inspect the stencil and service filters when required.
Machine videos
See the equipment before discussing a configuration.
Video players are loaded only after you select a video, helping the page remain quick to open.
Machine video 1
View the S-1688 machine in operation on YouTube.
Machine video 2
Review another machine view before requesting details.
Machine video 3
Use the final video to compare working views.
Technical specifications
Current S-1688 product data.
These figures follow the latest supplied S-1688 specification sheet. Confirm process-specific options before purchase.
| Model | S-1688 |
|---|---|
| Product | Pneumatic stencil cleaning machine |
| Maximum stencil size | 750 mm (L) × 750 mm (W) × 40 mm (H) |
| Liquid tank capacity | 40 L (max.) |
| Wash method | 360° double-sided rotary nozzles liquid spray wash |
| Dry method | 360° double-sided rotary nozzles compressed-air blow dry |
| Clean time | 2–5 min (solder paste stencil) |
| Dry time | 2–5 min (solder paste stencil) |
| Filtration | 1 mm filter mesh for pump protection; 20 μm filter bag for solid particles; 1 μm filter element for solder paste or red glue |
| Air supply | 0.5–0.7 MPa |
| Air consumption | 400–600 L/min |
| Net weight | 230 kg |
| Air outlet size | Φ120 × H30 mm |
| Machine size | 800 mm (L) × 950 mm (W) × 1630 mm (H) |
Spare parts & maintenance
Serviceable components, clearly shown.
The parts below are shown to support identification and maintenance planning. Availability, service intervals and compatibility should be confirmed against the final machine configuration. Select any image to enlarge it.
Installation basics
Prepare the site before the machine arrives.
Use these as planning points only. Follow the final installation and operating manual, local requirements and your cleaning-liquid safety documentation.
Compressed air
Provide clean, dry compressed air within the specified 0.5–0.7 MPa supply range.
Exhaust connection
Plan the specified machine exhaust connection and a suitable venting arrangement for the process area.
Floor condition
Install on a flat, dry, clean surface with adequate working clearance around the cabinet.
Operating environment
Use a ventilated area and maintain sufficient space for loading, maintenance and safe access.
FAQ
Questions buyers usually ask.
For any point that changes with cleaning liquid, stencil type or local installation rules, ask Southern Machinery to review the application.
What is the maximum stencil size?
The current supplied specification lists 750 mm (L) × 750 mm (W) × 40 mm (H) as the maximum stencil size.
Does the S-1688 need electrical power for cleaning?
The cleaning and drying cycle is all pneumatic and driven by compressed air. Confirm all final site installation and grounding requirements from the supplied manual and your local safety rules.
How long does one cycle take?
For a solder paste stencil, the stated clean time is 2–5 minutes and the stated dry time is 2–5 minutes. Actual settings should match the approved process.
What does the filtration system include?
The current specification lists a 1 mm mesh filter for pump protection, a 20 μm filter bag for solid particles and a 1 μm filter element for solder-paste or red-glue residue.
Can it be used with any cleaning liquid?
Cleaning-liquid compatibility is process-specific. Select a suitable liquid and verify its material compatibility, ventilation needs and safety documentation before operation.
What compressed-air supply is needed?
The machine requires 0.5–0.7 MPa compressed air and lists air consumption of 400–600 L/min.
Which replacement parts can be supplied?
Common serviceable components shown on this page include filters, seals, timer, pneumatic valves, gauges, a diaphragm pump, filter bag, ceramic bearing and start valve. Confirm the exact part against your machine configuration.
Downloads
Source documents for technical review.
Open the supplied product documents to review the original technical and operating material. Where figures differ, use the current specification section on this page for public product data.
Request a technical discussion
Need to confirm stencil size, residue or site conditions?
Send your application details and Southern Machinery can help review a suitable S-1688 cleaning setup.