SILVI-CREW LTD

SPACING SAW TRAINING PROGRAM: MODULE 5

ADVANCED FILING AND MOTOR MECHANICS

OBJECTIVES

This module is designed to provide the student with an indepth understanding of the filing angles, their design and function, and methods of achieving these angles during regular maintenance and repair filing. The interaction of daily and periodic preventative maintenance schedules are introduced and examined in terms of repair free operation. Finally the concept of time parameters involved with time and motion productivity studies of precommercial thinning operations.

"PREREQUISITES

Module 1. INTRO TO SPACING SAWS AND PERSONAL SAFETY GEAR

Module 2. INTRO TO MAINTENANCE AND REPAIR PROCEDURES

Module 3. GENERAL PREPARATIONS FOR SPACING SAW WORK

MATERIAL COVERED

A.) Filing Techniques and Modifications

B.) Time and Motion Parameters

C.) Daily and Periodic Maintenance Schedules

D.) Repair Procedures

STUDENT PERFORMANCE EVALUATION:

Each student must demonstrate satisfactory filing and discuss the design and function of filing angles. This includes possible modifications of these angles with respect to the season of cutting operation and the species of trees being cut. The interaction mechanism between preventative and repair maintenance must be understood. The interaction of time parameters during the scheduled day must also be discussed with emphasis on minimizing non(c)productive time and maximizing actual productive time

"RESOURCE MATERIALS

SILVI-CREW LTD. INSTRUCTOR'S LESSON PLAN Module 5

SUBJECT: Spacing Saw Training Program

A. Filing Techniques and Modifications

Three critical angles and their function are discussed below. Also, the filing position and stroking action is examined.

a. Review of filing angles - top plate filing angle and function 15 - 20 degrees - the angle across the top of the cutter - from the file guide PURPOSE - controls aggressiveness sideways into the wood.

MODIFICATIONS - hardwood - softwood - winter - summer - top plate cutting angle and function 45 - 60 degrees - the angle under the top plate - results from diameter of file and height of handle PURPOSE - to lift chip up and out of the cutting area.

MODIFICATIONS

HW, SW, winter,summer - side plate filing angle and function 0 - 10 degrees - viewed from the outer side - from the cutting corner down - results from diameter of file and height of handle PURPOSE - controls the "feed" into the wood, must be slight hooked

MODIFICATIONS

B. Time And Motion Parameters

Flow Chart with explanations

C. Daily Maintenance Schedules

D. Periodic Maintenance Procedures

Use caution while adjusting. Do not screw jet screws in to deep. From a closed position, open high jet 3/4 turn and open low jet 1 full turn. "Throttle idle adjustmen Start saw and let it warm up (2 - 3 min.) Turn throttle screw clockwise until the blade turns. For final adjustment, turn screw back, counter(c)clockwise until the blade is steady with the engine in smooth idle. "Low jet adjustment From the idle position, turn low jet screw clockwise. Engine speed will increase to a point and then decrease. Find this position of maximum speed, then turn the screw back counter-clockwise 10 to 15 minutes on the clock face (< 1/4 turn). Check acceleration of throttle. "High jet adjustment" Brace saw and bring it to full throttle. Turn high jet screw until it reaches 11,500 rpm. Measure this with a tachometer. To high means to hot operation meaning shorter engine life. Experienced operators can make this adjustment by ear, but a tach is recommended.

E. Repair Potentials

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Last Updated 02/18/2004