Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: benergybenergy on July 15, 2007, 05:18:11 PM

Title: hello every one, im new, i got a question
Post by: benergybenergy on July 15, 2007, 05:18:11 PM

Hiya All.....

Could someone explain the look ahead feature to me..
also when i have the feed speed cranked up, the follow line the machine takes is no longer true to the gcode, it seem to cut corners and swerve out before taking a corner...

regards

Benergy

Title: Re: hello every one, im new, i got a question
Post by: james elder on July 21, 2007, 09:26:22 AM

hi benergy
And welcome.

Somewhere, and I'm sorry i can't find it at the minute, Art has posted the definitive explanation on this site.

Basically your machine is behaving correctly. To borrow Art's similie you could drive down a street to a right angle corner and take it safely if you're travelling slowly. If you speed up you ain't gonna make it. So you slow down towards the corner, or cut the corner, and this is what your maachine is doing - looking ahead for those corners it won't get round.
Find art's explanation. The complexity of the calculation is amazing.

Jim