Fagor CNC 8035 - Page 118

 Installation manual
CNC 8035
4.
MACHINE PARAMETERS
Axis parameters
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·118·
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 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.
Possible values
Between 0.0001 and 99999.9999 degrees or millimeters.
Between 0.00001 and 3937.00787 inches.
Default value: 5 mm.
Axis type Encoder type PITCH (P7) NPULSES (P8)
Linear axis. Linear encoder. Encoder resolution. 0
Rotary encoder. Leadscrew pitch per
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 1/10 gear ratio PITCH = 36º.
Axis type Encoder type 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.