Lead/Delay Times (Dynamic Cam) - Siemens SINUMERIK 840D Function Manual

N3: Software cams, position switching signals
13.2 Cam signals and cam positions
13.2.4

Lead/delay times (dynamic cam)

Function
To compensate for any delays, it is possible to assign two lead or delay times with additive
action to each minus and plus cam for the cam signal output.
The two lead or delay times are entered in a machine data and a setting data.
Note
The input of negative time values causes a delay in the output of cam signals.
Lead or delay time in machine data
The first lead or delay time is entered in the following general machine data:
● MD10460 SW_CAM_MINUS_LEAD_TIME[n]
● MD10461 SW_CAM_PLUS_LEAD_TIME[n]
For example, the following can be entered into the machine data:
● Constant internal delay times between actual value sensing and cam signal output (e.g. as
determined by an oscilloscope)
● Constant external delay times
Lead or delay time in setting data
The second lead or delay time is entered into the following general setting data:
● SD41520 SW_CAM_MINUS_TIME_TAB_1[n]
● SD41521 SW_CAM_PLUS_TIME_TAB_1[n]
● SD41522 SW_CAM_MINUS_TIME_TAB_2[n]
● SD41523 SW_CAM_PLUS_TIME_TAB_2[n]
● SD41524 SW_CAM_MINUS_TIME_TAB_3[n]
● SD41525 SW_CAM_PLUS_TIME_TAB_3[n]
410
(lead or delay time at the minus
cams)
(lead or delay time at the plus
cams)
(lead or delay time at the minus
cams 1 – 8)
(lead or delay time at the plus
cams 1 – 8)
(lead or delay time at the minus
cams 9 – 16)
(lead or delay time at the plus
cams 9 – 16)
(lead or delay time at the minus
cams 17 – 24)
Lead or delay time on plus cams
17 - 24
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA