I think G64 without a tolerance can only blend moves that are exactly
tangent - that would mostly apply to paths made up of lines joined by arcs.
I thought G61 ('exact path' mode) did this already?
G61.1 is 'exact stop' mode which will stop at the beginning and end of
each move.
The Pxxx for
Hi
I want to describe my understanding for low feed system.
I will use direct drive mounting and that mean 5 revolutions for 1 inch of
travel per minute.
5 revolution times 360 degree is 1800 degree per 1 inch per minute.
0.0001 travel per minute means system will have 1.8 degree per minute.
My
Hi
I (we?) have no idea of the application, but if the system is always going
to operate at low speeds, what about a fat flywheel on the drive motor to
smooth things out?
Regards
Roland
On 23/04/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi
I want to describe my understanding for low
John Kasunich wrote:
Jon Elson wrote:
John Kasunich wrote:
Jon Elson wrote:
I have no idea how hard it is to do better with this lookahead,
It's hard. :-(
That's the rub - if there is a discontinuity the machine has to slow
down. But it doesn't know there is a discontinuity until it gets
Anders Wallin wrote:
I think G64 without a tolerance can only blend moves that are exactly
tangent - that would mostly apply to paths made up of lines joined by arcs.
I thought G61 ('exact path' mode) did this already?
G61.1 is 'exact stop' mode which will stop at the beginning and end of
On Wed, 23 Apr 2008 [EMAIL PROTECTED] wrote:
Date: Wed, 23 Apr 2008 09:14:49 -0600 (MDT)
From: [EMAIL PROTECTED]
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]
hi
i will use that setting for grinding, tool grinding and slow feed is
should be there to make grinding process work. everage feed 0.001 inch per
minute. But i want to system be stable at 0.0001 inch per minute to
machine work stable.
i want to find all possobilities on this matter, before any
Enough for what? At that slow rate (with n o dynamic load) the servo system
will basically step one count at a time at the 2.7 Hz rate but each step will
only advance 600 nano inches, Are your mechanics good enough that this
matters?
Even with a variable load +-10 counts should be easy,
Just a minor note. I think the conv-float-u32 behavior might have
changed. I run my spindle speed through conv-float-u32 to get a number
to send to my serial DAC. It used to remove the negative for reverse
direction, but now faults to zero. I just added abs to the input to fix
it. It took me a
conv-float-u32 has never taken the absolute value of its input.
Through and including version 2.1.7, there *was* a bug in conv-float-u32
which caused a negative value (e.g., -1) to output as a very large value
(e.g., 4294967295 or 0x) when 'clamp' is TRUE. In 2.2.0 and
newer, negative
Roland Jollivet wrote:
Hi
I (we?) have no idea of the application, but if the system is always
going to operate at low speeds, what about a fat flywheel on the drive
motor to smooth things out?
You'd need an incredible flywheel to smooth out a motor movong
at 1.8 degrees per minute! I
On Wed, 2008-04-23 at 15:29 -0500, Jeff Epler wrote:
If you have specific examples of input and output values (along with the
value of the 'clamp' parameter) that have changed between emc versions
(please note which versions!), I'd be happy to tell you if it's a result
of this bugfix, or a
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