Re: Re: Re: Re: BDI and servos
Posted by
Ray Henry
on 2002-12-09 05:03:02 UTC
> From: Bob Simon <bsimon@...><s>
> I have one question. Are there user available (.ini file?) parametersHi Bob.
> to establish where the controller breaks smooth motion and applies a
> deceleration/acceleration before continuing with the next block? Many
> controllers call this "auto exact stop" or something like that. The
> parameter usually represents an angle (deg or rad). If this angle is
> exceeded, the controller will insert a standard end of move
> deceleration and accelerate in the next move. I've seen more
> complicated schemes that adjust the decel/accel proportional to the
> departure angle. One system even uses an angle table. Most proportional
> schemes seem to be overkill...IMO.
Um.... Here's what Tom Kramer, the author of the interpreter, says about
path modes.
-----snips from RS274NGC-----
3.5.14 Set Path Control Mode - G61, G61.1, and G64
Program G61 to put the machining center into exact path mode, G61.1 for
exact stop mode, or G64 for continuous mode. It is OK to program for the
mode that is already active. See Section 2.1.2.16 for a discussion of
these modes.
2.1.2.16 Path Control Mode
The machining center may be put into any one of three path control
modes: (1) exact stop mode, (2) exact path mode, or (3) continuous mode.
In exact stop mode, the machine stops briefly at the end of each
programmed move. In exact path mode, the machine follows the programmed
path as exactly as possible, slowing or stopping if necessary at sharp
corners of the path. In continuous mode, sharp corners of the path may be
rounded slightly so that the feed rate may be kept up. See Section 3.5.14
and Section 4.3.5.3
The canonical machining functions share with the RS274 language the
simplifying assumption that machine dynamics can be almost ignored. That
is, in this model, acceleration and deceleration do not occur. Components
of the machining center can be told to move at a specific rate, and that
rate is imagined as being achieved instantaneously. Stopping is also
imagined as instantaneous. This model obviously does not correspond with
reality. The control modes provided here provide some compensation for
this lack of consideration of dynamics.
-----end-----
G61.1 might work out a bit like you are thinking but being able to change
path mode based on some arbitrary ini value isn't there... yet.
Ray
Discussion Thread
Fred Smith
2002-11-29 14:53:44 UTC
DeskCNC now in beta release
Tim Goldstein
2002-11-29 17:32:30 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC now in beta release
aussiedude
2002-11-29 18:45:01 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC now in beta release
Carol & Jerry Jankura
2002-11-29 18:48:11 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC now in beta release
aussiedude
2002-11-29 19:25:17 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
aussiedude
2002-11-29 19:31:19 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
Tim Goldstein
2002-11-29 19:31:55 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC now in beta release
Tim Goldstein
2002-11-29 19:39:59 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
Tim Goldstein
2002-11-29 19:44:02 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
aussiedude
2002-11-29 19:51:43 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
Tim Goldstein
2002-11-29 20:06:16 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
aussiedude
2002-11-29 20:18:21 UTC
RE: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
Chris L
2002-11-29 20:27:45 UTC
Re: [CAD_CAM_EDM_DRO] DeskCNC Versus Master 5 / Mach 1
stevenson_engineers
2002-11-30 01:22:18 UTC
Re: DeskCNC Versus Master 5 / Mach 1
Jens Swales
2002-11-30 02:58:15 UTC
Re: DeskCNC Versus Master 5 / Mach 1
Chris L
2002-11-30 07:03:05 UTC
Re: [CAD_CAM_EDM_DRO] Re: DeskCNC Versus Master 5 / Mach 1
Fred Smith
2002-12-06 08:57:36 UTC
Re: DeskCNC now in beta release
stevenson_engineers
2002-12-06 10:43:08 UTC
Re: DeskCNC now in beta release
Bob Simon
2002-12-06 11:08:53 UTC
BDI and servos
Tim Goldstein
2002-12-06 13:29:50 UTC
Re: [CAD_CAM_EDM_DRO] Re: DeskCNC now in beta release
Jon Elson
2002-12-06 22:02:18 UTC
Re: [CAD_CAM_EDM_DRO] BDI and servos
Ray Henry
2002-12-07 07:16:47 UTC
Re: BDI and servos
Bob Simon
2002-12-07 08:39:19 UTC
Re: [CAD_CAM_EDM_DRO] BDI and servos
blown_mgb_v8 <jblackwood5@i...
2002-12-07 08:51:32 UTC
Re: BDI and servos
Bob Simon
2002-12-07 08:58:13 UTC
Re: [CAD_CAM_EDM_DRO] Re: BDI and servos
Ray Henry
2002-12-07 17:02:43 UTC
Re: Re: BDI and servos
Ray Henry
2002-12-07 17:45:06 UTC
Re: Re: BDI and servos
Ray Henry
2002-12-07 17:45:09 UTC
Re: Re: Re: BDI and servos
Jon Elson
2002-12-07 22:10:25 UTC
Re: [CAD_CAM_EDM_DRO] BDI and servos
Jon Elson
2002-12-07 22:11:46 UTC
Re: [CAD_CAM_EDM_DRO] Re: BDI and servos
Bob Simon
2002-12-08 11:48:05 UTC
Re: [CAD_CAM_EDM_DRO] Re: Re: BDI and servos
Bob Simon
2002-12-08 11:48:06 UTC
Re: [CAD_CAM_EDM_DRO] BDI and servos
Jon Elson
2002-12-08 23:09:55 UTC
Re: [CAD_CAM_EDM_DRO] Re: Re: BDI and servos
Jon Elson
2002-12-08 23:12:29 UTC
Re: [CAD_CAM_EDM_DRO] BDI and servos
Ray Henry
2002-12-09 05:03:02 UTC
Re: Re: Re: Re: BDI and servos
Bob Simon
2002-12-11 09:40:23 UTC
Re: [CAD_CAM_EDM_DRO] Re: Re: Re: Re: BDI and servos