Curtis 1212S - Page 20

Curtis 1212S Manual, R ev. B
17
3 — PROGRAMMABLE PARAMETERS: Motor Parameters
MOTOR MENU
ALLOWABLE
PARAMETER RANGE DESCRIPTION
System Resistance 0 – 800 mΩ Sets the system resistance (motor + brushes + wiring + connections) used
for load compensation and speed estimation. Control system performance
depends on this parameter being set correctly; it must be set to the actual
cold motor resistance.
For instructions, see initial setup procedure
4, on page 25.
Resistance Auto Comp On, Off Resistance can be automatically measured under a preset low current
before the brake is released. The measured motor resistance plays an
important role in IR compensation.
The Resistance Auto Comp parameter enables/disables this
automatic function.
Auto Comp Current Limit 5 – 50 % Sets the current limit used for automatic resistance testing, as
a percentage of the Main Current Limit (see Current menu).
Speed Scaler model specic Themotorspeedisproportionaltothemotor’sbackEMF.TheSpeed
Scaler parameter sets the maximum voltage that the back EMF can
reach.
V
bemf = Vmotor – I*R
V
motor=voltagemeasuredbetweenthemotor’stwoterminals
Allowable Speed Scaler range
1212S-2xxx: 20 – 27 V
1212S-3xxx: 30 – 40 V.