Feed rates?

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03 Mar 2016 23:05 #71000 by BigJohnT
Replied by BigJohnT on topic Feed rates?
In Axis the Feed Override changes the feed rate and the Rapid Override changes the rapid rate.

JT

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03 Mar 2016 23:06 #71001 by tjamscad
Replied by tjamscad on topic Feed rates?
Yes but what are they called in the INI file?

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03 Mar 2016 23:18 #71002 by BigJohnT
Replied by BigJohnT on topic Feed rates?
MAX_VELOCITY, there is no feed rate in the ini file.

linuxcnc.org/docs/2.7/html/config/ini-co...s__lt_num_gt_section

JT

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04 Mar 2016 02:31 #71003 by cmorley
Replied by cmorley on topic Feed rates?

I do not understand the terminology used in LinuxCNC. If I want to adjust my axis feed rate what is that called? If I want to adjust my axis rapid feed rate what is that called?


I believe you are using linuxcnc 2.4 or so.
At that time there was no such thing as rapid override, there was almost equivalent 'max velocity override'
Max velocity override if turned down low enough will affect feed moves too.
I believe in 2.7 rapid override was added.

Chris M

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04 Mar 2016 13:30 #71028 by tjamscad
Replied by tjamscad on topic Feed rates?
So adding a line "max velocity override" if set to 150% of my max feed rate would give me a rapid override.

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05 Mar 2016 04:12 - 05 Mar 2016 04:14 #71076 by cmorley
Replied by cmorley on topic Feed rates?
no.
max velocity shows units per minute in AXIS (probably inches per minute for you)
In AXIS the setting is used from the INI (in order of precedence):
[DISPLAY] MAX_LINEAR_VELOCITY or
[TRAJ] MAX_LINEAR_VELOCITY or
[TRAJ] MAX_VELOCITY
in the INI it is entered ans units per second.

You should see it on the AXIS screen as 'Max Velocity' with a slide bar.
say your machine max velocity (ie rapid moves) are 300 inches per minute and typical feeds are 20 inches per minute.
if while running a program you adjust the max velocity slide to 200 inches per minute then rapids are limited to 200.
since feed moves are less then 200 they are not affected.
if you then adjusted the max velocity slide to 15 then rapids and feed moves are limited to 15 inches per minute.

Chris M
Last edit: 05 Mar 2016 04:14 by cmorley.

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