Baldor mn1854 manual Axis One ENC Mode, Open Loop, Application Notes

Configure Encoder If you are not using an encoder, set encoder mode to OPEN LOOP and skip to MECH.

Configuring Encoder Mode [ EMi ]

EDIT > SETUP > ENC > MODE

Value: Open Loop

Range: Open Loop, Open–Stall,

Closed Loop, Closed Loop–PM

– Axis One ENC Mode –

–↑ OPEN LOOP ↓ –

↑or ↓ to select value, press ENTER

Press ← or → to select next axis.

Open Loop	The OPEN LOOP position will be displayed on the keypad.
Open–stall	The OPEN LOOP position will be displayed on the keypad, and the
	encoder will be used for stall detection. (See Following Error)
Closed Loop	The actual encoder position is displayed on the screen. All subsequent
	moves are calculated from this actual position. All moves are based on
	encoder pulses. Stall detection is enabled. Positioning resolution will
	equal the resolution of your encoder.

Closed Loop–PM Same as closed loop except for the post move position maintenance of the last commanded position. Provides a “pseudo–servo” operation for a stepper system. Closed Loop–PM will not correct position while navigating menus with the keypad.

Use PM GAIN, PM VMAX, and IN–RANGE WINDOW parameters to specify position maintenance tuning parameters.

Application Notes:

Following–error is still active while in CLOSED LOOP–PM mode. A following–error will occur when the number of correction steps exceeds the following error value. This allows the unit to signal a fault when the displacement cannot be corrected, i.e. an obstruction. Ensure proper operation in Open Loop mode before attempting Closed Loop–PM mode.

Configuring Encoder Resolution [ ERi ]

EDIT > SETUP > ENC > E–RES

Value: 5000 cnts/in

Range: 1–9,999,999

– Axis One ENCODER RES–

–↑5000 cnts/in ↓ –

Select value, press ENTER Press ← or → to select next axis.

This option sets the encoder resolution. The resolution is specified in encoder pulses per in of travel, post–quadrature. To prevent end–of–move dither, an encoder resolution of 8000 or less is recommended.

MN1854 Setup 5-3