Curtis 1238SE - 1 − Speed Mode Tuning

9 — TUNING GUIDE
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017 Return to TOC
pg. 94
f. Adjust the Brake Rate as necessary while reversing the throttle input (i.e., full throttle forward
to low throttle reverse, full throttle forward to full throttle reverse, full throttle reverse to low
throttle forward, etc.). If a brake input is present in the application (Brake Pedal Enable = On)
continue adjusting Brake Rate by applying dierent amounts of brake throttle (i.e., full throttle
forward, then apply full brake or full throttle forward, then apply low brake, etc.). For AC pump
applications the Brake Rate has no eect on performance since the AC pump will not run in
reverse nor with a brake input.
AC pump motor applications, which in step “a” had the Pump Enable parameter set to On, may
also be controlling hydraulic valves (load hold valve, proportional valve). e Proportional Driver
parameters (page 53) and some VCL will typically be used to set up the control of these valve
driver outputs. Consult with your Curtis distributor or support engineer regarding hydraulic
valve control.
1 − Speed Mode Tuning (see pages 32–39)
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 the 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_
SpdM that changes (in the VCL soware). If the Max_Speed_SpdM changes, set the 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_SpdM 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 (LS & HS) typically do not need to be changed as the default values work well in
most applications. ese parameters control how tightly the actual motor speed will track the
requested speed trajectory (speed trajectory is set by the Accel, Decel, and Brake rates).
If you want to adjust the Kp (for looser or tighter following of the speed trajectory), follow these guidelines.
• Set the following parameters. Before setting them, make a note of their present (default)
settings so you can return them to these original values at the end of this procedure.
– In the Speed Mode » Speed Controller menu, set the Max Speed to low value
(≈1000 rpm), as high speed operation is not needed to observe system response.
– In the Speed Mode » Response menu, set all the Accel and Decel rates to their
fastest values (0.1 seconds); this allows better observation of the system response.
– In the Speed Mode » Restraint menu, set the So Stop Speed parameter = 0 rpm
to disable the so stop speed function.
– In Speed Mode » Restraint » Position Hold Menu, set Position Hold Enable = O
such that the position hold function will not interfere with the speed control gain
setup procedure.
– If your vehicle has an EM Brake, in the EM Brake menu, set the EM Brake Type = 1.
is setting will release the EM Brake as soon as interlock is asserted.
WARNING
Quick Links:
Control Mode select p.31
Speed Mode menu p.32
Speed Controller menu p.32
Max Speed
Kp
Ki (LS/HS)
Response menu p.35
Accel Rate
Decel Rate
Brake Rate
Restraint menu p.37
So Stop Speed
Position Hold
menu p.38
EM Brake Control menu p.49
Typical Max Speed p.54