User guide

Adjusting
Turtle
Angles
and
Distances
in
Apple
Logo
The Logo procedures that make the Valiant tum and move are programmed at pre-set levels.
However, because each
Valiant has its own individual personality, a tum command, such as RT 90,
may turn the Valiant slightly more or slightly less than 90 degrees. Similarly, a movement
command,
such as FD 10, may not move the Valiant
as
far forward as
you
might like.
You can change the calibrations of either Valiant turns
or
distances from within Logo. Experiment
until you find the proper calibrations. To make the changes permanent, you can save them on the
disk.
Adjusting
the
Valiant's
Angle
and Distance
Calibrations
1. Set up the Valiant and load the Valiant Control Software into your computer.
2. To adjust the angle calibration, type
SETANGLE
n,
where n
is
the number for the new angle
calibration. The default value of
SET ANGLE is
1.
Make the value larger to have the Valiant turn
farther; make the value
smaller to have the Valiant turn less.
3. Test the new value on the Valiant and make adjustments until
you
are satisfied.
4. To adjust the distance calibration, type
SETDIST
n,
where n
is
the number for the new distance
calibration. The default value of
SETDIST
is
10. Make the value larger to move the Valiant
farther; make the value smaller
to
move the Valiant less.
5. Test the new value for
SETDIST and make adjustments until you are satisfied.
Saving
the
Calibrations
on
the
Disk
1 . Start with a fresh Logo by restarting the system.
2.
Insert the Valiant Turtle Software disk into the disk drive.
3. Type
LOAD
"VALSSC.PROCS and press the Return key twice
in
quick succession. The disk
drive light will turn
on
and off several times as the computer accesses the disk drive.
4. When
the?
cursor returns,
an
extra cursor will be printed on the screen.
5. To reset the angle calibration, change the value of SETANGLE to the appropriate number.
6. To reset the distance calibration, change the value of
SETDIST to the appropriate number.
7. Erase the
old file by typing ERASEFILE "VALSSC.PROCS.
8. Save the new file and values by typing
SAVE
"VALSSC.PROCS.
10