Program Sequence; Programmable Current Blocks; Fig. 13: Available Current Blocks - Bosch Rexroth PST 6 Serie Betriebsanleitung

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Information on this product
5.3.3

Program sequence

Programmable current blocks

5.3.3.1
Start
Solenoid
+ +
-
1.SQZ
PreWLD
+
1. %I
SQZ
1st current block
(pre‐heating time)
SQZ: Squeeze time (for more information, please refer to section 5.3.3.4 from page 266)
WLD: Weld time (for more information, please refer to section 5.3.3.4 from page 263)
HLD: Hold time (for more information, please refer to section 5.3.3.4 from page 268)
%I: Heat (current)

Fig. 13: Available current blocks

Using the inputs for program selection, the required program is first
selected and then started via High level at the respective start input.
Each welding program includes all parameters which are necessary for
the exact definition of a weld.
Basic parameters are, e.g.
• %I values which should be active in different current blocks (refer to
section 5.3.3.1)
• Times which should run after each other (refer to section 5.3.3.4
from page 266)
• Electrode force (for a description, refer to page 322).
The process may require that the amount of heat needed for a single
spot weld is provided in consecutive current blocks.
Therefore, a spot weld can be generated from max. three current blocks
(PreWLD, MainWLD, PstWLD), where the time and %I of each indivi­
dual block can be programmed separately.
Programming of the %I is dependent on the active regulation mode
(refer to page 269):
PHA (phase angle):
KSR (constant current regulation) in kA
Cool times (1.CT, 3.CT) can be programmed between the blocks.
Setting a cool time = 0, the respective 2 blocks will be positioned next to
each seamlessly.
a spot weld is generated
+
+
- -
-
1.
MainWLD
CT
2nd current block
Parameter setting in BOS:
In "Programming", flag "Schedule".
Prerequisite for programming of the %I: parameter "x.WLD" is greater
than 0.
in SCV (scale values)
+ +
+
-
- -
3.
CT
2. %I
3rd current block
(post‐heating time)
PST 6xxEx | 1070087088 / 08
+ +
- -
PstWLD
HLD
3. %I