Johnson Hardware V-40, VH-24, V-24, E-16, VH-40, V-16 instruction manual Blade Tensioning, Blade Guides

4/29/03

BLADE TENSIONING

The blade indicator is located inside the upper wheel compartment, on the lower left side of the idle wheel. (See machine features graphic) The indicator has an arrow mounted on the horizontal plane, with a corresponding scale for blade tensioning. The scale has two legends, one reads inches from 0 - 1”, the second reads mm 0 - 25 mm. This allows tensioning either standard or metric blade widths.

With out tension on the blade, the indicator should read zero. As tension is applied to the blade the needle will move accordingly, and should be tightened until the correct blade width is indicated on this gauge. Example: Installing a 1/2” blade on the machine, tighten the handwheel until the indicator’s arrow is pointing to the 1/2” mark on the scale. Before starting the machine check the blades tracking by hand as described in an earlier section.

This indicator has been calibrated at the factory. If recalibration is ever needed follow the steps below.

Using a blade tension gauge, (many times the company that you purchase blades from can furnish you with this gauge) tension the blade to the proper PSI. The PSI will very from blade types (carbon, Bi- metal) and blade widths. This information can be obtained from your blade supplier. When proper tension is achieved, loosen the setscrew in the collar on the tensioning wheel shaft. (See figure 6) Adjust this collar up or down on the shaft until the arrow is pointing to the corresponding blade width. on the indicator. Tighten setscrew.

Note: It is better to over tension the blade than to run it under tensioned.

BLADE GUIDES

Your machine has come equipped with a set of interchangeable “V” type blade guides. A set of guides consist of two each left hand and two each right hand guide inserts. The standard guides furnished are 10 / 12 mm guides. Other sizes are optional, and can be purchased separately, or as a five piece set. The five-piece set includes 3 / 4 mm (1/8 - 1/4”) 6 / 8 mm (5/16 - 3/8”) 10 / 12 mm (standard set 1/2 - 5/8”) 16 / 20 mm (3/4”) and 25 / 32 mm (1”) The

blade width will dictate the size blade guide to be used.

Note: Never use blades larger than the rated capacity of the machine. Never use blades narrower than guide insert. Damage will occur to guide insert and blade. Blade insert must correspond with blade width.

Manual V-16, V-24, VH-24, V-40 & VH-40 10 – Section I