The G41 and G42 require the use of the D-word. The D word refers to the line in the tool table where the diameter of the tool is to be read. It is often the same line as the tool number, but it doesn't have to be. The second qualifier is the travel of the tool from invoking the G41 or G42 must be greater than the radius of the tool.
Craig On 02/17/2017 12:44 PM, [email protected] wrote: > Subject: > Re: [Emc-users] G41-42 and G64 Bug?q > From: > "Todd Zuercher" <[email protected]> > Date: > 02/17/2017 10:38 AM > > To: > "Enhanced Machine Controller (EMC)" <[email protected]> > > > Another odd bug like behavior I am seeing. > Set up a tool in the tool table with an extremely small diameter, load that > tool, and run the g-code below with the optional block skip on and then again > with it off. > > G64 > G43 > G0 X1.5 Y.375 Z1 > /G41 > G1X1Y.5Z.5 > G1X0.5 > G2 X4.5 I2 J0 > G1 X0.75 > G0Z1 > G40 > > Notice how having G41 turned on seems to shut off blending. Why is that? > > ----- Original Message ----- > From: "Todd Zuercher"<[email protected]> > To: "Enhanced Machine Controller (EMC)"<[email protected]> > Sent: Friday, February 17, 2017 11:25:06 AM > Subject: Re: [Emc-users] G41-42 and G64 Bug?q > > The small radius "is" the tool radius, and it was created by Linuxcnc when it > created the G41 tool offset. > > ----- Original Message ----- > From: "Jim Craig"<[email protected]> > To:[email protected] > Sent: Friday, February 17, 2017 9:27:23 AM > Subject: Re: [Emc-users] G41-42 and G64 Bug?q > > Todd, > > Is the cutter radius larger than the small radius transitioning from > the straight line to the semicircle. would this cause the issue? > Grasping at straws here as I don't use G41/G42. > > I guess I don't understand why the small arc radius is being shown at > all in white if the below code is the programmed path. > > Jim > > On 2/16/2017 3:04 PM, Todd Zuercher wrote: >> Maybe, it is or isn't a problem. >> The g-code is only: >> >> G43 >> G0 X1.5 Y.375 Z1 >> G41 >> G1X1Y.5Z.5 >> G1X0.5 >> G2 X4.5 I2 J0 >> G1 X0.75 >> G0Z1 >> G40 >> >> It runs perfectly fine without the G41 reguardless of the G64 setting. I >> guess the planner must see that arc in the transition from one line to the >> next in G41 and the Q is acting it, even though it isn't actually written in >> the g-code. >> Something else to remember when using tool comp. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
