It seems to me that you have all the information you need to do the work in the .TMP file, I am just speaking in theory here because I am a little short on time. That said, in your ARC section you can capture the original feedrate and store it in a variable capture the tool diameter from the job plan capture the programmed radius set a variable equal to programmed radius divided by the feature radius (this would be the programmed radius+the tool radius) evaluate the variable to see if it is <.5 If the variable is <.5 set the variable = to the feedrate * variable then use the variable in place of the #feed word then reset the #feed to force the next line or profile section to output a feed
And this may all be possible from the .SMF file. . .it seems there is a question
there about slowing down for arcs.
Sorry I don't have time to give you the specific code or commands.
David
"Jon Baker" <[EMAIL PROTECTED]> on 01/30/2001 11:23:59 AM
To: [EMAIL PROTECTED]
cc: (bcc: Dave Hayden/elliott)
Subject: [mfg-smartcam] Feed rate adjustments?
Hey group, I have a question for the masses.
Whenever I machine a slot, the sides tend to be on size, but the length is
short. So I have routinely slowed down the cutter feed rate at the end of the
slot to compensate for the short programmed path, as compare to the feature.
ie) Mill a 1/2 slot, full end radii, with a 3/8 end mill, the programmed
path end radius is only .0625 when programming to tool center. I never really
had a formula for the amount to reduce the feed rate, but have seen it now
explained as the cutter path rad. divided by the feature radius, times the
feedrate.
ie) .0625/.25=.25 factor. .25 x 20 ipm=5ipm for end radius, then back up
to 20ipm for the straight away, just like nascar.
OK, fine, this seems logical enough for a formula, tho if anyone else has a
better one, I would love to hear it.
NOW THE QUESTION....
Is there a way to make smartcam do this calculation for me whenever the
factor value is .... say, under .50?
This would eliminate all the feed rate changes and returns in the shape file,
making it just simply the geometry to program.
If not a template section, what about a macro to adjust feed rate down a
percentage, then return it, from picking only a single element?
This isn't the most pressing issue, just trying to further my limited
intelect (sp) dang, as if I have much.
Thanks group
Jon Baker
|
Hey group, I have a question for the
masses.
Whenever I machine a slot, the
sides tend to be on size, but the length is short. So I have routinely
slowed down the cutter feed rate at the end of the slot to compensate for the
short programmed path, as compare to the feature.
ie) Mill a 1/2 slot, full end
radii, with a 3/8 end mill, the programmed path end radius is only .0625 when
programming to tool center. I never really had a formula for the amount to
reduce the feed rate, but have seen it now explained as the cutter path rad.
divided by the feature radius, times the feedrate.
ie) .0625/.25=.25 factor.
.25 x 20 ipm=5ipm for end radius, then back up to 20ipm for
the straight away, just like nascar.
OK, fine, this seems logical enough for a formula,
tho if anyone else has a better one, I would love to hear it.
NOW THE QUESTION....
Is there a way to make smartcam
do this calculation for me whenever the factor value is .... say, under
.50?
This would eliminate all the feed rate changes and
returns in the shape file, making it just simply the geometry to program.
If not a template section, what about a macro to
adjust feed rate down a percentage, then return it, from picking only a single
element?
This isn't the most pressing
issue, just trying to further my limited intelect (sp) dang, as if I have much.
Thanks group
Jon Baker
|
