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Basic Characteristics RAPID

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Spot Welding <strong>RAPID</strong> Summary<br />

carry on their tasks until they come to a well defined process stop. For example, this<br />

will make the gun open after a finished weld, although the program has stopped.<br />

The opening and closing of the gun are always executed by <strong>RAPID</strong> routines, even if<br />

activated manually from the I/O window on the teach-pendant. These gun routines may<br />

be changed from the simple on/off default functionality to a more complex like analog<br />

gun control.<br />

Since the process and supervision tasks are acting on I/O triggers, they will be executed<br />

either by the trig that was sent by the motion (SpotL) or by manual activation (teach<br />

pendant or external). This offers the possibility of performing a stand-alone weld anywhere<br />

without programming a new position.<br />

It is also possible to define new supervision events and to connect them to digital signal<br />

triggers. By default, a state dependent weld power and water cooling signal control are<br />

implemented.<br />

Supported equipment:<br />

- One weld timer monitoring with standard parallel (some serial) interface<br />

- Any type of single/dual gun close and gun gap control.<br />

- Any type of pressure preset.<br />

- Event controlled SpotL-independent spot weld equipment such as contactors<br />

etc.<br />

12.4 Programming principles<br />

Both the robot’s linear movement and the spot weld process control are embedded in<br />

one instruction, SpotL.<br />

The spot welding process is specified by:<br />

- Spotdata: spot weld process data<br />

- Gundata: spot weld gun data<br />

- The system module SWUSER, SWUSRF and SWUSRC: <strong>RAPID</strong> routines and<br />

global data for customising purposes. See Predefined Data and Programs<br />

ProcessWare.<br />

- System parameters: the I/O configuration. See User’s Guide - System Parameters<br />

3-32 <strong>RAPID</strong> Reference Manual

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