Johnson Hardware VH-24, V-24, E-16 Hydraulic Feed Table, Welding Instructions General Description

4/29/03

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HYDRAULIC FEED TABLE

Machines equipped with a hydraulic feed table (VH models) have a pumping unit in the base. The system has an adjustable relief valve, which is factory preset at 400 p.s.i. This setting may be reduced to afford greater sensitivity for cutting soft or thin materials. Pressures may be lowered by turning the square nut located on the top right hand side of the reservoir. (See below graphic) The systems oil level must be checked periodically to assure the oil levels are maintained at the full level of the sight glass.

The feed table regulator will provide a smooth movement to the table. If the feed appears to be intermittent it is probably due to air in the system. This is normally exhausted by running the table in and out a few times.

WELDING INSTRUCTIONS

GENERAL DESCRIPTION

Note: Always wear eye protection when using this welder or grinder!

Your Dake vertical band saw is equipped with a “resistance-type” butt welder. The two clamp jaws of the welder hold the blade ends together. When the welding start knob is turned fully clockwise past the zero setting, electric current flows through the blade ends creating enough heat to soften and join them.

Note: This welder is suitable to weld Metal blades 3 x 0.5 - 25 x 0.8mm bi-metal blades 6 x 0.9 - 25 x 0.9mm

This welder should not be used for welding 2% and 3% tungsten-alloyed metal cutting blades or HSS blades.

The approximate valves for bi-metal blades are indicated in the matrix in the next column.

Note: * The weld current step and upsetting pressure step have to be increased with some saw manufactures. The saw blade has to be metallically clean and no tooth may enter into the welding seam.

BANDSAW	WELDING	UPSETTING	UPSETTING	ANNEALING	ANNEALING
	CURRENT	PRESSURE	WAY
mm	step *)	step *)	mm	COLOR	TIME SEC.
6 x 0.9	1 - 2	1	2.5	DARK RED	15
10 x 0.9	1 - 2	1	3.0	DARK RED	15
12 x 0.6	1 - 2	1	3.0	DARK RED	15
12 x 0.9	1 - 2	1	3.0	DARK RED	15
13 x 0.7	1 - 2	1 - 2	3.0	DARK RED	15
16 x 0.7	1 - 2	1 - 2	3.0	DARK RED	15
19 x 0.9	1 - 2	1 - 2	3.0	DARK RED	15
25 x 0.9	1 - 2	1 - 2	3.5	DARK RED	15

1. PREPARATION OF BLADE

Before welding the blade ends should be cleaned or rubbed with emery cloth on both sides of the blade to a length of 1”, until they are metallically clean over the enter width.

Manual V-16, V-24, VH-24, V-40 & VH-40 21 – Section I