Feed rates?

I have a machine that should run 140 ipm on the liner and 160deg/min on the angular.

What does that make my AXES section look like. does trajectory planner over the axes section?

Can you rephrase your question? I'm not sure what you are asking.

Are you asking for help to set the INI file properly or is the machine not doing what you think it should be doing.

Chris M

In the TRAJ section the maximum velocity of a combined move is set in units per second.

linuxcnc.org/docs/2.6/html/config/ini_co...tml#sub:TRAJ-section

MAX_LINEAR_VELOCITY =
MAX_ANGULAR_VELOCITY =

So 140 ipm would be 2.333 ips.

MAX_VELOCITY = 5.0 - The maximum velocity for any axis or coordinated move, in machine units per second. The value shown equals 300 units per minute.

In the AXES section the maximum velocity of the axis is set in units per second.

MAX_VELOCITY =

Rick G

I have a machine that has been running for a while but I am getting compaints about how slow it moves. What I want to accomplish is to get it running the speeds the machine was orginally designed for then if I get complaints I can say it is running to factory specs.

Also, what version of Linuxcnc is it running? What does a sample of the code that is running too slow look like?

There are issues with the new trajectory planner and running code that uses axis other than XYZ. When the new planner runs into g-code that has movement in A, B, C, W, U, or V axis, naive-cam-detection is turned off, and the old 1 line look a head speed limit is reinstated.

LinuxCNC Ver. 2.4.0~pre

###############################################################################
# Trajectory planner section
###############################################################################
[TRAJ]
#
AXES = 9
COORDINATES = X Y Z A B C U V W
HOME = 0 0 0 0 0 0 0 0 0
LINEAR_UNITS = inch
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 1.67
MAX_VELOCITY = 4.0
MAX_ACCELERATION = 100.0
DEFAULT_ACCELERATION = 1.0
TLO_IS_ALONG_W = 1

###############################################################################
# Axes sections
###############################################################################

[AXIS_0]
TYPE = LINEAR
HOME = 0.000
MAX_VELOCITY = 1.6
MAX_ACCELERATION = 5.0
INPUT_SCALE = 20000
OUTPUT_SCALE = 1.000
MIN_LIMIT = -121.850
MAX_LIMIT = .70
COMP_FILE_TYPE = 1
COMP_FILE = Xaxis.cmp
FERROR = 10.0
MIN_FERROR = 10.0
HOME_OFFSET = 0.5
HOME_SEARCH_VEL = 0.3
HOME_LATCH_VEL = -0.01
HOME_USE_INDEX = yes
HOME_IGNORE_LIMITS = yes
HOME_SEQUENCE = 1
DEADBAND = 8e-05
PID_MAX_VEL = 0
P = 250
I = 0
D = 4
BIAS = 0
FF0 = 0
FF1 = 2.06
FF2 = 0.04

###############################################################################

For starters you say you want 140 inches/min on your linear axis, but you have your X axis set to a max vel of 96 (1.6ips).

You didn't share what your settings are for any other axis, or what your G-code looks like.

It is a 5 axis machine X,Y,Z,A,B.

I have no idea what kinematics it is running.

All liner axes should be 140ipm and all angular should be 160 deg/min.This is the problem the shop is complaining about it being to slow. Also what would "rapid" be called in LinuxCNC?

After homing the machine the operator types in MDI G0G90X0Y0Z0A0B0.