Re: Re: Bobcad & Cutter Comp

> From: Jon Elson <jmelson@...>
>
>
> Could you tell me a little about how you do this in Bobcad? I use it,
> and
> manually edit the programs right now to do this. I select a location on
> the
> screen, and place a 'point' there, for the lead-in start point, and
> another
> for the lead-out, so that I don't trigger the concave corner problem.
> Then, I tell bobcad/CAM to move to the point, and then move to the
> point where I want to actually begin cutting, and then 'cut all'.
> Then, I manually edit in the G41 or G42 code at the appropriate
> line in the code, and the G40 for the lead-out. I then have to run
> this by the backplotter a few times until I get all the points, side of
> offset and everything else going right. So, I could use some help
> getting Bobcad to do it in a more organized manner, if there is one.
> I don't recall an approach and depart function, but I could have missed
> it.

Look under Other (curves). The construction is a little strange in certain
circumstances, but if you draw a start point and a finish point, the
Approach and depart function will step you through the process. It
generates a teardrop shape if you use the same start and end point.

To save time in generating the code, I usually put the G41 in a custom
block. The default setup in V17 has it there. Place your cursor on the
first G01 move, at the end of the line & click Custom-G41. I also usually
set it to merge with previous line, so it appends it to the line & doesn't
add another one. Same with the G40 at the last linear feed move. These
should work at the end of the line, even though they are taught most places
to be on the front, few controls require them to be either before or after
the G01 and the coordinates. However few controls will allow startup of
cutter comp with anything but an X-Y planar, linear move. Also most like to
have at least a full diameter of length to get the cutter from "On-Center",
to "On the Side".

You should be able to set your up/down settings, and use cut-auto from any
location. It is no longer really necessary to use point position or cut
single for most work with Bobcad (version 16 and up).

In Vector the approach and depart is more automated, to the point that the
start point does not need to be drawn. It also automatically inserts the
G41/G42/G40 in the program. It does this by reacting independently within a
layer name, to the first, in-between, and last lines of a continuous chain.
Different layer names can have different behaviors, comp right, comp left,
no comp, same also applies to cycles. Just put a series of points on a
layer named G81, and they will be processed automatically with the defined
behavior for the first point(G81 call out), points in between(just
coordinates), and the last point(followed by G80).


Best Regards,

Fred Smith
IMService

imserv@...
Phone: 248-486-3600 or 800-386-1670
Fax:248-486-3698


Best Regards,

Fred Smith
IMService

imserv@...
Phone: 248-486-3600 or 800-386-1670
Fax:248-486-3698