Table 3, " THICKNESS CHECK Screen Items " lists and describes the Thickness Check screen items related to the setup and measurement method for part thickness check function.
Table 3. THICKNESS CHECK Screen Items
Item | Description |
---|---|
Thickness check |
This setting specifies whether thickness checking is enabled. In the case of on request mode, this becomes thickness check permissive. ENABLE — >checking is done based on thickness check mode selected below DISABLE — >(default) checking is globally disabled and never done. |
Thickness check Mode |
This item specifies whether every spot should be checked or only those spots that are preceded by the condition, TCHK_RQD. ALL — >if thickness check is set to ENABLE, checks are done for every spot and press motion that is not preceded by the TCHK_SKP condition. ON_RQST (“on request”) — > (default) if thickness check is set to ENABLE, checks are done only for each spot and press motion that is preceded by the TCHK_RQD condition. |
Check at 0kg |
This item specifies whether thickness should be checked with no pressure in the gun. An additional step is added to relax the gun in this case. ENABLE — >the weld pressure will be set to a minimum value (i.e. the gun is relaxed) prior to checking thickness. After the measurement is done the gun will close to weld pressure before welding. DISABLE — >(default) check is performed when gun reaches the specified weld pressure. This is the faster of the two measurement styles. |
Settling time delay (ms) |
This item specifies a delay after achieving pressure, before reading thickness value. Adding a delay might improve the repeatability of the measurement but will increase the time required to complete the measurement. Range of Settings: 0-9999 — >(default = 0) time in ms that system will wait after pressure is achieved before checking the part thickness. |
Alarm severity |
This item specifies the severity level of the message that is posted when an out-of-tolerance condition is detected. WARN — >(default) if thickness check yields an out-of-tolerance value, a warning message is posted but the program and weld will execute normally FAULT — > if thickness check yields an out-of-tolerance value, a fault will be issued that will immediately stop the robot and pause the program. No welding will be done. |
Under thickness limit (mm) |
This item specifies the maximum deviation from specified
thickness in the negative direction. For example, if:
Range of Settings: 0-99.9mm — > (default = 0.5mm) A value of 0.5mm or higher is recommended for most users. |
Over thickness limit (mm) |
This item specifies the maximum deviation from the specified
thickness in the positive direction. For example, if:
|
Thickness out of tolerance DO |
The output number (DO index) asserted, when a thickness alarm occurs. The specified output will turn on for the duration specified by the system variable $sggun#.$setup.$tc_almiopls (default=500ms) when an out-of-tolerance part is detected. Range of Settings: 0 -> 999 — > (default = 0) |