Parameter Assignment - Siemens SINUMERIK 840D sl Function Manual

W4: Grinding-specific tool offset and tool monitoring
18.5 Constant grinding wheel peripheral speed (GWPS).
Status
The following interface signal can be used to determine whether or not the GWPS is active:
DB31, ... DBX84.1 (GWPS active)
New tool
If GWPS is to be selected with a new tool for a spindle for which GWPS is already active, the
active GWPS must first be deselected (otherwise an alarm is output).
Response to reset/part program end
In the basic setting, GWPS is deactivated for a reset or end of part program and the spindle
is stopped. The machine data settings behind this behavior can be changed as needed (see
"Parameter assignment (Page 870)").
Additional properties
● GWPS can be activated for every grinding tool (tool type: 400 to 499) in each channel.
● GWPS can be active simultaneously for several spindles, each with a different grinding
tool, in the same channel.
18.5.2

Parameter assignment

Automatic activation
If the constant grinding wheel peripheral speed (GWPS) is to be automatically selected for a
spindle after Power On, and remain selected during mode switch, reset or end of the part
program, the following machine data bit must be set to "1":
MD35032 $MA_SPIND_FUNC_RESET_MODE Bit 0 = 1
Note
The prerequisite is that the tool be a grinding tool (tool type 400 to 499), the tool-specific
parameters $TC_TPG1, $TC_TPG8 and $TC_TPG9 are set, and $TC_TPG1 refers to a valid
spindle.
Behavior of spindle after reset/part program end
If the spindle is not to stop after a reset or end of part program, but is to continue rotating at
the current speed, the following machine data must be set to "1":
870
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions