ADLINK PCI-8164 - Manual (Page 98)

86 Operation Theory
_8164_start_tr_move(AxisNo,5000,0,5000,0.001,0.001),
then use the following function:
_8164_verify_speed(0,5000,&minAccT, &maxAccT,5000);
The value miniAccT will be 0.0267sec and maxAccT will be
873.587sec. This minimum acceleration time does not meet the
requirement of 1mS. To achieve such a low acceleration time the
over speed value must be used.
By changing the OverVelocity value to 140000,
_8164_verify_speed(0,5000,&minAccT, &maxAccT,140000);
The value miniAccT will be 0.000948sec and maxAccT will be
31.08sec. This minimum acceleration time meets the require-
ments. So, the motion command can be changed to:
_8164_fix_speed_range(AxisNo,140000);
_8164_start_tr_move(AxisNo,5000,0,5000,0.001,0.001);
Notes:
X
The return value of _8164_verify_speed() is the mini-
mum velocity of motion command, it does not always equal
to your start velocity setting. In the above example, it will be
3pps more than the 0pps setting.
X
To disable the fix speed function
_8164_fix_speed_range() use
_8164_unfix_speed_range()
X Minimize the use of the OverVelocity operation. the more it
is used, the coarser the speed interval is.