4 — PROGRAMMABLE PARAMETERS
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017 Return to TOC
pg. 34
1- SPEED MODE — ACCELERATION FEEDFORWARD MENU [OPTIONAL]
PARAMETER ALLOWABLE RANGE DESCRIPTION
Kaff
Kaff_SpdM
0x3013 0x00
0 – 500 A
0 – 5000
This acceleration feedforward term is designed to improve throttle
responsiveness and speed controller performance at all speeds. It can be
thought of as a “quick start” function which can enhance responsiveness at
all speeds.
Using your present accel and decel rates, observe the average current you are
running at full throttle at low speeds while accelerating without load on at
ground, and set Kaff to 50–70% of that value.
NOTE: If any accel rate parameters get changed, this parameter will need
to be changed also.
Kbff
Kbff_SpdM
0x3019 0x00
0 – 500 A
0 – 5000
This braking feedforward term is designed to improve braking responsiveness
at all speeds.
Using your present decel rates, observe the average current you are running
at full throttle braking, and set Kbff to that value.
Build Rate
Acc_FF_Build_Rate_SpdM
0x3095 0x00
0.1 – 5.0 s
100 – 5000
Determines how fast the Kaff and Kbff terms build up.
For traction systems, if you feel or hear the mechanical slop pick up abruptly
when you move the throttle from neutral to a very small value, slowing the
build rate (i.e., setting it to a higher value) will soften the feel.
For a pump system, start with this parameter at the minimum setting. Slowing
it down (i.e., setting it to a higher value) will reduce over-shoot if too much
feedforward has been commanded.
Release Rate
Acc_FF_Release_Rate_SpdM
0x3096 0x00
0.1 – 5.0 s
100 – 5000
Determines how fast the Kaff and Kbff terms release. It should be set fast
enough (i.e., at a low enough value) to prevent the vehicle from running on
after throttle release.
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