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39
Curtis enAble
®
40-Series Manual, Rev. B
7 — TUNING GUIDE
3 Set up the Speed Modes
The chair can have up to nine different speed modes. The operator selects them
by pressing the handcontrol’s Up and Down buttons.
STEP 1. Define how many speed modes there will be, using the Number
of Modes parameter (Program > Handcontrol > Speed menu).
STEP 2. Define the maximum limit for each of these speed modes, starting
with Speed 1. Set the highest speed mode you have to 100%. The
speeds between Speed 1 and this highest speed do not need to be
linear. However, the speeds do have to be a progression, with each
higher numbered speed being faster than the one before it.
STEP 3. Set the Forward and Reverse Minimum Speed parameters (Program
> Profile 1 > Drive menu) to 1% for now. This will allow the
chair’s minimum speed to be directly controlled by the Speed 1
setting.
4 Match the Powerbase to the Motor Wiring
The Motor Swap parameter (Program > Motors and Brakes menu) allows you
to invert and/or swap the left and right motor characteristics in order to match
the way the chair is wired — without physically swapping the wires around.
STEP 1. Move the joystick slightly forward and left and observe how the
chair moves. Release the joystick.
STEP 2. If the chair moves in the correct direction, the Motor Swap
parameter is set correctly. If it does not, select the next Motor
Swap setting and repeat Step 1 until you find the right setting
to match your wiring.
5 Determine the System Resistance
This value is critical to the internal speed estimation and compensation algo
-
rithms. Once it has been set, it should not be modified throughout the following
tuning procedures.
STEP 1. Slowly drive the chair flush against a wall, high curb, or some
other immovable object.
STEP 2. Set the Motor Test parameter (Program > Motor & Brakes menu)
On. This puts the system into a special mode with limited current.
STEP 3. Select the highest speed mode, using the handcontrol keypad.
STEP 4. Go to the Monitor > Motors & Brakes menu and scroll down
to Resistance Test.
STEP 5. Push the joystick full forward, driving the chair hard against the
object or wall, and note the Resistance Test value.
STEP 6. Set the System Resistance parameter (Program > Motors & Brakes
menu) to this monitored value.
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