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WELDERS ITEM 8201N ÷ 8214N
EDITION: MAY 2008 PAGE 14 OF 32
Working Stroke Adjustment
Adjust working stroke as short as possible to get:
1) Higher productivity.
2) Faster pressure rise time on the pieces to weld.
3) Higher follow up.
4) Higher working precision.
5) Reduced labour accident possibility.
6) Reduced air consumption.
7) Reduced noise.
The working stroke can be adjusted either by moving the lower console or, if the unit is spot
welding operated, by moving one of the two electrode-holders.
To adjust the lower console height, first slacken nuts 102, then slacken screws 101. Carry out the
desired adjustment by means of the hydraulic jack, then tighten home first screws 101, then nuts
102.
The stroke adjustment must be carried out in order to avoid that the cylinder reaches the end of
the stroke, limiting or cancelling by doing so the force on the piece. Remind that both electrodes
and tools wear increases the working stroke.
When operating large-sized pieces spot welding it can be necessary to use a high stroke to be
able to insert pieces among the electrodes. To allow the use of a reduced
stroke even when operating in this way, this unit is equipped with a control
device called “double stroke”. A key switch, placed on the welder and marked
with the symbol hereby shown, enables to select two different electrodes gaps:
the working stroke and the great gap used to position the piece. When the
double-stroke is not used, the corresponding control key must be removed in
order to avoid that its employ causes risks.
On request, on some welders it is assembled a foot-control device as the operator, who must
hold the piece to weld, is not able to control also the key switch.
If the welder is equipped with the relevant option, it is possible to adjust the double stroke by
means of the proper hand-wheel placed on the cylinder. Always carry out this operation keeping
the double stroke disabled.
