Manual Elektra Beckum SK200 (page 16 of 36) (English, German, Dutch, Spanish)

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3.0 General Information For Welding Transformer/Rectifier Operators

Dust, dirt and metal chips will harm any welding machine. It is of particular importance that the air ventilation for cooling

is not obstructed.

A weld should join two work pieces as if they were made from a single piece. Prior to the welding the joints must be

cleaned and dirt, rust, grease and paint removed. Also slag from previous welds must be completely removed. Attach

earth clamp firmly to work piece, assuring good metal to metal contact. Check that all cables and connectors are in proper

operating condition to ensure proper current conduction.

Place electrode with the uncoated end into one of the electrode holder's notches. Each welding machine is supplied

complete with an accessory kit, which includes besides the welding cables a welding visor and a slag hammer. When

removing slag it is recommended to protect the eyes by suitable means (goggles) from injury by sharp and hot slag. The

welding visor's dark glass plate protects the eye against ultra-violet and infrared rays. The clear glass plate protects the

dark plate against spatters and damage. The dark protective glass is available in different shades for different types of

electrodes and to suit different eye sensivity. Normally for electrodes from 1.5 mm to 4 mm Ø protective glasses of shade

DIN 9 are used, for electrode over 4 mm Ø shade DIN 10.

Select the correct welding current as shown below:

Current (A) Electrode Ø Material Thickness

15 - 50 1.0 - 2.0 mm 1.0 - 2.0 mm

50 - 100 2.0 - 2.5 mm 2.0 - 4.0 mm

100 - 140 2.5 - 3.25 mm 4.0 - 8.0 mm

140 - 220 3.25 - 5.0 mm 8.0 - 12.0 mm

220 - 300 5.0 - 6.0 mm 12.0 - 20.0 mm

In principle do not use too thick an electrode. As a general rule calculate 40 amps welding current per 1 mm of electrode

diameter. Depending on electrode type, material thickness and weld position this calculated value may have to be

adjusted to plus or minus.

All machines work well with thin plate from 1.0 mm thickness.

3.1 Care Of Stick Electrodes And Their Correct Use

In order to achieve a good weld the electrode has to be dry, thus storing in a dry place is essential- Should electrodes

have become moist, dry in an oven at between 200° C to 300° C for 30 minutes.

Basic coated low-hydrogen type electrodes always require pre-drying at 200° C to 300° C for 3 hours as atomic

hydrogen causes weld flaws.

Box 22 IP.. Degree of protection, e.g. IP21 or IP23.

Box 23 Symbol for protection class II, if applicable.

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Elektra Beckum SK200 Manual

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