Curtis 1238SE - Tuning Guide; Selecting the Control Mode; 0 − Speed Mode Express Tuning

9 — TUNING GUIDE
pg. 93
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
9 — TUNING GUIDE
Many aspects of vehicle performance can be optimized, using the wide variety of adjustable
parameters available to these E and SE controllers. Once a vehicle/motor/controller combination
has been tuned, the parameter values can be made standard for the system or vehicle model. Any
changes in the motor, the vehicle drive system, or the controller will require that the system be tuned
again to provide optimum performance.
Selecting the Control Mode (see page 31)
Before starting to tune your vehicle’s performance, you must select which control mode you use. Set
the Control Mode Select parameter = 0 (Speed Mode Express for either traction or pump motors),
= 1 (Speed Mode, for either traction or pump motors) or = 2 (Torque Mode, for traction motors).
Cycle KSI input O and then On (to clear any parameter change faults) and use the 1313 handheld
or 1314 PC programmer to check for faults in the controller. en proceed to the tuning steps for
the control mode you have selected.
Conduct the steps in the sequence given, because successive steps build upon the ones before. It
is important that the eect of these programmable parameters be understood in order to take full
advantage of the controller’s powerful features. Please refer to the descriptions of the applicable
parameters in Chapter 4 if there is any question about what any of them do.
0 − Speed Mode Express Tuning (see page 31)
Speed Mode Express is the same as Speed Mode with the exception that it has fewer parameters and is
therefore simpler to use. Most vehicle applications will nd success with Speed Mode Express; however,
for some applications vehicle performance cannot be satisfactorily ne-tuned in Speed Mode Express.
In this case, change your control mode to Speed Mode (i.e., set Control Mode Select =1).
a. For traction applications, set Pump Enable to O. For AC pump applications, set this parameter On.
b. Adjust Max Speed to the maximum speed the motor should turn in the vehicle application; this
speed setting corresponds to an input of full throttle.
c. Adjust Typical Max Speed to the approximate maximum speed that the motor will spin. is is
usually the same value as the setting for Max Speed, but some applications have a Max_Speed_
SpdMx that changes (in the VCL soware). If the Max_Speed_SpdMx changes, set Typical Max
Speed to the highest speed the motor is expected to reach. is value does not need to be set
precisely since it will not change motor performance. Typical Max Speed sets a reference point for
the “rate” parameters (accel, decel, brake rates), so that applications that have a changing Max_
Speed_SpdMx will not experience changes in the rates (because the rates are referenced to the
unchanging Typical Max Speed value). Once you set the Typical Max Speed parameter you should
not readjust it without adjusting all the rate parameters as well.
d. Kp and Ki typically do not need to be changed as the default values will work well in most applications.
If you want to adjust Kp (for looser or tighter following of the speed trajectory set by the accel, decel, and
brake rates), follow the procedure in step “d” in the Speed Mode tuning section.
e. Adjust the Accel Rate and Decel Rate as necessary while moving the throttle to dierent positions
(i.e., neutral to full throttle, half throttle to full throttle, full throttle to half throttle, full throttle
to neutral, neutral to low throttle, etc.). For AC pump applications, typically the Accel Rate and
Decel Rate are set very fast for quick response to hydraulic inputs.
Quick Links:
Control Mode select p.31
Speed Mode Express menu p.31
Max Speed
Kp
Ki
Accel Rate
Decel Rate
Brake Rate
Typical Max Speed p.54