Fagor CNC 8055i FL EN - Example of Spindle: Encoder in the Motor

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Installation manual

CNC 8055

CNC 8055i

CONCEPTS

SOFT: V02.2X

Gear ratio management on axes and spindle

7.19.4 Example of spindle: encoder in the motor

Having a spindle with 4 gears. The maximum rpm and the gear ratio for each gear are the following:

Gear 1: maximum speed 1000 rpm, gear ratio 4:1.

Gear 2: maximum speed 2000 rpm, gear ratio 2:1.

Gear 3: maximum speed 3000 rpm, gear ratio 4:3.

Gear 4: maximum speed 3500 rpm, gear ratio 1:1.

The encoder is an HOP model (Vpp) and provides 18,000 pulses per turn.

Sercos / CAN spindle

 spindle parameter DRIBUSLE (P51) = 1.

Parameters involved in the calculation of the velocity command:

 spindle parameter MAXGEAR1 (P2) = maximum rpm of the first gear = 1000.

 spindle parameter MAXGEAR2 (P3) = maximum rpm of the second gear = 2000.

 spindle parameter MAXGEAR3 (P4) = maximum rpm of the third gear = 3000.

 spindle parameter MAXGEAR4 (P5) = maximum rpm of the fourth gear = 3500.

 spindle parameter INPREV1 (P72) = Input revolutions of the first gear =4.

 spindle parameter INPREV2 (P74) = Input revolutions of the second gear =2.

 spindle parameter INPREV3 (P76) = Input revolutions of the third gear =4.

 spindle parameter INPREV4 (P78) = Input revolutions of the fourth gear =1.

 spindle parameter OUTPREV1 (P73) = output revolutions of the first gear =1.

 spindle parameter OUTPREV2 (P75) = output revolutions of the second gear =1.

 spindle parameter OUTPREV3 (P77) = output revolutions of the third gear =3.

 spindle parameter OUTPREV4 (P79) = output revolutions of the fourth gear =1.

Parameters involved in the calculation of the position feedback.