Fagor CNC 8055i FL EN - Page 209

Installation manual
CNC 8055
CNC 8055i
MACHINE PARAMETERS
6.
SOFT: V02.2X
·209·
Axis parameters
• When the travel is limited to less than a revolution and a positive and negative display is desired,
for example P5=-120, P6=120, it is possible to program G90 with positive and negative values.
PITCH (P7)
Defines the pitch of the ballscrew or the resolution of the linear feedback device being used.
It must be set when the feedback is handled through the CNC connector; analog servo or digital
with DRIBUSLE = 0.
Analog or Sercos servo system.
The meaning of parameter PITCH depends on the type of axis and encoder used.
• On linear axis with rotary encoder, it sets the leadscrew pitch per encoder turn.
• On linear axis with linear encoder, it sets the resolution of the encoder.
• On rotary axis, it sets the number of degrees the shaft rotates per encoder turn.
With this type of servo system, parameter PITCHB (P86) has no meaning.
When using gear reduction on the shaft, only the whole assembly must be taken into account when
setting one of parameters PITCH or NPULSES.
CAN servo system.
The meaning of parameter PITCH depends on the type of axis regardless of the type of encoder
used.
• On linear axis, it sets the resolution of the encoder.
• On rotary axis, it sets the number of degrees the shaft rotates per encoder turn.
In this type of servo system, the leadscrew pitch is set through parameter PITCHB (P86).
When using gear reduction on the shaft, only the whole assembly must be taken into account when
setting one of parameters PITCH or NPULSES.
NPULSES (P8)
Indicates the number or pulses/rev provided by the rotary encoder. When using a linear encoder,
it must be set to ·0·.
Possible values
Between 0.0001 and 99999.9999 degrees or millimeters.
Between 0.00001 and 3937.00787 inches.
Default value: 5 mm.
Axis type Type of encoder PITCH (P7) NPULSES (P8)
Linear axis. Linear encoder. Encoder resolution. 0
Rotary encoder. Lea dsc rew p it ch p er
encoder turn.
Number of pulses (lines)
per encoder turn.
Rotary axis. Rotary encoder. Degrees that the shaft
rotates per encoder turn.
Number of pulses (lines)
per encoder turn.
Linear axis with a 5 mm pitch leadscrew. PITCH = 5 mm.
Axis with a 20µm-pitch Fagor linear encoder PITCH = 0,020 mm.
Rotary axis with a 1/10 gear ratio. PITCH = 36º.
Axis type Type of encoder PITCH (P7) PITCHB (P86) NPULSES (P8)
Linear axis. Linear encoder. Encoder resolution. 0 0
Rotary encoder. Encoder resolution. Leadscrew pitch per
encoder turn.
Number of pulses (lines)
per encoder turn.
Rotary axis. Rotary encoder. Degrees that the shaft
rotates per encoder
turn.
0 Number of pulses (lines)
per encoder turn.