Manual

Detailed Descriptions of ACL Commands 3-7
AS[<flag>] Auxiliary Speed
This command selects an alternate servo routine which outputs “bump” changes on the
AUX1 output bit each time either the X or Y stepper motors step.
AT[<flag>] Arm Timer
This command is used to determine if the machine is kept busy at all times in a benchmark
test. If, during the test run, the buffer empties, a counter will be incremented once per parser
cycle, indicating that a program was running too slowly to keep the machine constantly
busy. AT1; will turn on the feature and zero an internal variable that is incremented each
time a service loop finds the buffer empty. This variable is output after AT0; (which also
turns off the feature) and if it is zero then no delays occurred. If it contained 1200 then it
means that 1200 loops occurred during the run when the buffer was found to be empty.
Programmers could then optimize their software and run the test again. If the number is
reduced it would mean that they made their software more efficient. AT; will turn off the
timer feature with no timer counter output.
AZ <z> Absolute Z Axis Move
This command moves the Z axis motor to a specified absolute location, <z>. The motion
uses the acceleration, step rate, and half/full-step mode established by the CZ command.
<z> can be in the range 0 through 32766.
The motor is left at full power after the move.
The AZ command uses the Z axis travel limits. The lower limit is always 0. The upper limit
is <mod> - 1, where <mod> is the Z axis modulus as specified by the CZ command. If the
<z> parameter is outside the range 0 through <mod> - 1 then an error is logged and the Z
axis moves to the nearest limit (i.e. it moves as far as possible in the desired direction).
If the STOP button is pressed (or an external Emergency Stop switch closes) while the Z
motor is moving, the motor stops immediately. Its physical position reference remains
accurate unless the sudden deceleration causes the motor to slip. However, the No Z
Reference status bit is set regardless. (See the OS command.)
If the machine is already in the Emergency Stopped state when the AZ command is received,
the command is ignored. See the STOP button in Chapter 4 and the FZ command in this
chapter.
The Z axis has no calibration factor, origin offsetting, or antibacklash vectors.