On Wed, 15 May 2024, John Dammeyer wrote:
Date: Wed, 15 May 2024 16:57:44 -0700
From: John Dammeyer <jo...@autoartisans.com>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "'Enhanced Machine Controller (EMC)'" <emc-users@lists.sourceforge.net>
Subject: Re: [Emc-users] Acceleration Settings?
-----Original Message-----
From: Jon Elson [mailto:el...@pico-systems.com]
Sent: May 15, 2024 4:20 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Acceleration Settings?
On 5/15/24 12:23, Todd Zuercher via Emc-users wrote:
> I'm trying to figure out something goofy that seems to be going on with my
acceleration settings.
> I'm running Linuxcnc 2.9.0 and Axis ui.
> I have all of the max_acceleration settings set for 20.0 (and
stepgen_maxaccel = 25), and for some reason everything only moves with
an acceleration of 10 ipsps for G0 and G1 moves (confirmed with Halscope),
but jogging does go at 20. Is there normal behavior or am I missing some
setting somewhere that is limiting the acceleration?
>
In the latest LinuxCNC there are TWO places that have accel
and max velocity settings.?? Jogging is in the JOINT_x part,
and CNC moves are in the AXIS_x section.?? In general, you
want the same settings in both JOINT and AXIS sections.
Jon
That's interesting. What is then the major difference between Joint and
Axis? Just jogging parameters?
John
LinuxCNC versions 2.8 and > separate joints (think of these as actuators or
motors) and Axis. Axis are normally cartesian or rotary axis. This makes sense
for machines where joint and axis do not map exactly, such as gantry devices
that may have duplicated X,Y,Z joints (so up to 6) but only 3 axis or say a
CoreXY laser cutter where the joints and cartesian axis are related by a
kinematics equation.
Peter Wallace
Mesa Electronics
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