Newport MM4006, User Manual

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MM4006 F e a t u r e Descriptions Tutorial
NS I
ET I
TQ I
Enable the signal generation_
Execute the trajectory.
Read position of every pulse generated.
During the execution of a trajectory with such synchronized signals, each
time a pulse is generated, the real and theoretical position of all axes is
recorded in the global position buffer that could be read with the TQ com-
mand. The NS command thus terminates the effect of a previously entered
GQ command. To enable the global trace mode after a trajectory with syn-
chronized pulses, the GQ command must be re-issued.
A pulse is generated automatically as soon as the trajectory execution
reaches position:
Pulse position = Pos(NB) + (n * Step) with stage position E [NB... NE]
where: Step = CPTL/(NI - 1)
The position accuracy of the generated pulse (the difference between the
theoretical position Pos(NB) + n * Step and the real position where the
pulse is generated) depends on the trajectory velocity as follows:
MaxError = ± 0.707 * > a s e * Trajectory velocity)
This value cannot be smaller than the encoder resolution of X or Y axis.
If M a x E r r o r < encoder resolution of X axis.
then M a x E r r o r = encoder resolution of X axis.
If M a x E r r o r < encoder resolution of Y axis.
then M a x E r r o r = encoder resolution of Y axis.
Example
For a trajectory velocity of 20 mm/sec and Tba„ = 300 }sec:
MaxError = ±0.707 * (3 * 10-^ * 20) = ±4.24 pm
This position uncertainty exists for every pulse generated but is not cumu-
lative.
6.1.3 S y n c h r o n i z i n g Events to Trajectory Elements
Controller operations and functions can be synchronized to the execution
of a trajectory element. This is achieved by using the WNnn command.
The nn parameter represents the trajectory element number to synchro-
nize with. A t the beginning of this element, one or more secondary con-
troller activities could be initiated.
Example
Increase the trajectory velocity starting with element number 2 and reduce
it with element number 4.
I XX
lEP
NT
LX10
CR10, CA90
LY20
CX10, CY30
LXO
CXO, CYO
VV5
ET
Erase program #1 (if exists).
Start program entry mode.
Start new trajectory definition.
Trajectory element #1.
Trajectory element #2.
Trajectory element #3.
Trajectory element #4.
Trajectory element #5.
Trajectory element #6.
Set trajectory velocity to 5 mm/sec.
Execute trajectory.
C%J
EDF10181En1020 — 03/03
6.6 N e W p O r t .