> 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 fo
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 sys
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
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
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 en
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)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Very low PRM system.
>
> Hi
> I want to describe my und
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 bu
>
> 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 eas
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 whil
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 val
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!
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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