Introduction
This manual provides detailed instructions for the safe and efficient operation, installation, and maintenance of your DELTA 18 x 36 Drum Sander, Model 31-250. Please read this manual thoroughly before operating the machine to ensure proper use and to prevent injury or damage.
Safety Information
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep work area clean and well-lit. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Always wear appropriate personal protective equipment, including eye protection, hearing protection, and dust masks.
WARNING: Always disconnect the machine from the power source before making any adjustments, changing accessories, or performing maintenance.
Setup and Installation
Proper setup is crucial for the performance and safety of your drum sander. Follow these steps carefully.
Attaching Thickness Scale
- Remove the screw and washer (A) as shown in Figure 12. Note that the thickness scale is indicated as (B) in Figure 12.
- Place the thickness scale (B), as depicted in Figure 13, over the designated hole and then re-insert and tighten the screw and washer (A).
- Loosen screw (C) in Figure 14, and position the pointer against the scale (B) in Figure 14. Once aligned, tighten screw (C). IMPORTANT: For fine-tuning and adjustment of the scale, refer to the "CHECKING AND ADJUSTING TABLE HEIGHT" section later in this manual.
Figure 12: Illustrates the initial step of removing screw (A) and washer, with the thickness scale (B) shown. This prepares the mounting point for the thickness scale.
Figure 13: Shows the thickness scale (B) being placed over the hole, ready for the screw and washer to be re-inserted. This is the second step in attaching the scale.
Figure 14: Depicts loosening screw (C) to position the pointer against the thickness scale (B), followed by tightening screw (C). This step calibrates the thickness scale pointer.
Connecting Feed Motor to Feed/Speed Switch Assembly
WARNING: The table feed motor (A) in Figure 15 is located on the side of the feed table (B). Before connecting the feed motor to the feed-speed switch, BE CERTAIN THAT THE MACHINE IS DISCONNECTED FROM THE MAIN POWER SOURCE.
- Insert the pronged motor plug (C), as shown in Figure 15, into the female connector (D) of the feed/speed switch assembly. NOTE: The connector is polarized and will only fit one way.
- Figure 16 illustrates the DC power cord fully connected to the feed/speed switch assembly.
Figure 15: Shows the feed motor (A) and feed table (B), with the pronged motor plug (C) being inserted into the female connector (D) of the feed/speed switch assembly. This demonstrates the initial connection step.
Figure 16: Illustrates the completed connection of the DC power cord to the feed/speed switch assembly, showing the motor fully integrated.
Operating Instructions
Once the sander is properly set up, follow these guidelines for safe and effective operation.
- Power On/Off: Use the designated ON/OFF switch to start and stop the machine.
- Material Feeding: Ensure the workpiece is clean and free of foreign objects. Feed material smoothly and consistently into the drum sander.
- Speed Adjustment: Adjust the feed speed according to the material type and desired finish. Slower speeds are generally recommended for harder woods or finer finishes.
- Dust Collection: Always connect the sander to an effective dust collection system to maintain a clean work environment and prolong machine life.
- Belt Recommendations: Use sanding belts appropriate for your application. Refer to the "Belt Adjustments" section for proper installation and tensioning.
Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your DELTA Drum Sander.
- Cleaning: Regularly clean dust and debris from the machine, especially around the drum, feed rollers, and motor vents.
- Belt Replacement: Replace worn or damaged sanding belts promptly. Follow instructions for proper belt installation and tensioning.
- Lubrication: Periodically lubricate moving parts as specified in the "Parts Diagram" section of this manual.
- Inspection: Routinely inspect all fasteners, electrical cords, and safety features for wear or damage.
Troubleshooting
This section addresses common issues you might encounter during operation.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not start | No power, faulty switch, motor issue | Check power connection, inspect switch, consult service manual |
| Poor sanding finish | Worn belt, incorrect feed speed, improper table height | Replace belt, adjust feed speed, calibrate table height |
| Excessive vibration | Unbalanced drum, loose components, worn bearings | Inspect drum, tighten fasteners, contact service for bearing replacement |
Specifications
Key technical specifications for the DELTA 18 x 36 Drum Sander Model 31-250.
- Model: 31-250
- Sanding Capacity: 18 inches x 36 inches (Drum Sander)
- Print Length (Manual): 22 pages
- Language (Manual): English
- Publisher (Manual): Ozark Tool Manuals & Books
- Publication Date (Manual): January 1, 1900
Warranty and Support
For warranty information, technical support, or to order replacement parts, please refer to the contact information provided with your original purchase documentation or visit the official DELTA website.
For additional assistance, you may contact the manual publisher, Ozark Tool Manuals & Books, for manual-specific inquiries.