Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: manmeran on July 13, 2010, 04:56:18 AM

Title: pause button
Post by: manmeran on July 13, 2010, 04:56:18 AM

i have small problem
in feedrate about 1500~2000 mm/Min ,When I press the pause button ,malfunctioning  and should do it again.
In other words ,i must press twice.
Where is the problem ?
my version is R3.042.020


Amir

Title: Re: pause button
Post by: Hood on July 13, 2010, 05:41:31 PM

There have been times in the past that a double press was needed but I have not heard of any recent revisions with that issue.
Do you definitely have to press twice or could it just be it is taking a bit longer to feedhold due to the higher feedrate and you pressing twice makes it seem its needing the double press?
Hood

Title: Re: pause button
Post by: BR549 on July 13, 2010, 09:23:54 PM

Amir you may have to drop your look ahead down to 1 to get a faster pause.

Title: Re: pause button
Post by: manmeran on July 14, 2010, 03:05:03 AM

yes Hood. i need press twice in high feedrate, i dont have problem in low feedrate.

hi Terry
is it possible explain about "Look Ahead" ?

Amir

Title: Re: pause button
Post by: Hood on July 14, 2010, 03:33:50 AM

Look ahead is on General Config page, set it to 2 or so and see if it helps.

Hood

Title: Re: pause button
Post by: manmeran on July 14, 2010, 04:00:30 AM

i know position for look ahead. but i dont know What does it do?

Title: Re: pause button
Post by: Hood on July 14, 2010, 04:41:42 AM

Exactly as it says, it looks ahead in the code and takes it into account for planning.
I doubt that it will help for you though if you are certain that you have to press twice to get the feedhold to work.
Hood

Title: Re: pause button
Post by: manmeran on July 14, 2010, 02:34:50 PM

Quote

and takes it into account for planning

i dont understand your mean.

Amir

Title: Re: pause button
Post by: Hood on July 14, 2010, 02:46:37 PM

The manual has a short explanation.
Hood

Title: Re: pause button
Post by: BR549 on July 14, 2010, 07:39:43 PM

The look ahead also stacks the ouput buffer based partly on the look ahead size. The more look ahead the larger the buffer load to a point. That is why a large look ahead may take longer to respond to a feedhold. Where as a short look ahead responds faster.

(;-)