Starting
and
operating
Chapter 5
06.05.19
Working Instructions WIDOS 2500 / OD 315 with T-90°
Page 20 of 35
5.5.4.
Adjusting
The adjusting pressure for the pipe dimension to be welded can be gathered from the welding
table.
Open support again slightly.
Gather heating time, maximum change over time, cooling time and bead height for the pipe
dimension to be welded from the table.
Check the heating temperature. If the control lamp blinks, the nominal temperature has been
reached and is kept constant by means of a defined pulse-position ratio.
Swivel in the heating element which has been cleaned and brought to desired temperature.
If necessary wait until the control lamp at the heating element is blinking in regular intervals.
Drive the slides together by the hand wheel (chapter: Fehler! Verweisquelle konnte nicht
gefunden werden. no. 7), shock-free under the determined aligning force.
Read the applied force from the scale (no. 2).
Fix the slide by the lever (no. 3) and maintain the force.
Necessarily hold tight to the turnstile before you release the clamping lever and if the
slides have been driven together with force!
As soon as the prescribed bead height is reached, reduce the force (heating force = appr.10 % of
adjusting force).
Important! Do not open the slide.
5.5.5.
Heating
Now the heating time starts.
Press the stop-watch and compare the actual time with the nominal time taken from the welding
table.
5.5.6.
Change over
Quickly drive the slide apart after the heating time has elapsed, release the clamping lever;
necessarily hold tight to the turnstile.
Swivel the heating element as quickly as possible back and close the support smoothly.
The maximum time frame for this process is predetermined by the value for the change over time
taken from the table.
5.5.7.
Cooling
Built up the welding force, arrest the support by the lever and press the stop-watch.
If necessary, re-adjust the force during the cooling time (cooling force = adjusting force).