Search found 1287 matches

by twforeman
Fri Feb 01, 2019 7:38 pm
Forum: GRBL
Topic: G28 and M30 (program end) issues on Shapeoko 3
Replies: 4
Views: 588

Re: G28 and M30 (program end) issues on Shapeoko 3

G28 is "go to pre-defined position" If you don't have that position set, then it could cause issues. The predefined position is set by sending G28.1 followed by the X Y Z coordinates. I never use G28. G91 sets incremental mode G28 G91 Z0 doesn't really make any sense to me, since it's telling it to ...
by twforeman
Fri Feb 01, 2019 7:28 pm
Forum: Electronics
Topic: Homing
Replies: 1
Views: 291

Re: Homing

https://github.com/gnea/grbl/wiki/Grbl-v1.1-Configuration $23 determines which direction the axes move during homing. Z should move first, then X and Y together. If your machine is sitting on a limit switch when you start the homing sequence you will have problems. Make sure you are away from the sw...
by twforeman
Mon Jan 21, 2019 3:20 pm
Forum: Discussion
Topic: Happy birthday to Edward Ford
Replies: 1
Views: 317

Happy birthday to Edward Ford

It's Edward Ford's birthday today. We wouldn't have Shapeokos to talk about without @eford!
by twforeman
Fri Jan 18, 2019 4:16 pm
Forum: Discussion
Topic: shapeoko 3 max depth cut and feed?
Replies: 4
Views: 464

Re: shapeoko 3 max depth cut and feed?

Most of the material I cut is 3/4" maple - which is harder than pine. I usually run a 1/4" end mill at 50IPM with a .250" DOC.

My machine is modified a little from the standard S3 so I have more height under the router. I was cutting 2" thick pink insulation the other day.
by twforeman
Thu Jan 17, 2019 2:02 pm
Forum: GRBL
Topic: GRBL and tool radius compensation.
Replies: 2
Views: 616

Re: GRBL and tool radius compensation.

Grbl doesn't complain when you send a G41, but it doesn't support tool compensation.
by twforeman
Fri Nov 09, 2018 8:21 pm
Forum: GRBL
Topic: G-code Setting Home
Replies: 3
Views: 947

Re: G-code Setting Home

What you need is a CAM program - Computer Aided Machining. You would load in the 3D object you created in your CAD program and generate the tool paths required for machining it. It's a pretty large problem space and difficult to get into in a forum. CAM is not as automated as the slicing programs fo...
by twforeman
Thu Jun 07, 2018 3:33 pm
Forum: GRBL
Topic: Relocate "HOME" to lower left
Replies: 4
Views: 834

Re: Relocate "HOME" to lower left

The answer is always "Use the work coordinates system."

https://www.shapeoko.com/wiki/index.php ... te_Systems
by twforeman
Thu May 03, 2018 6:23 pm
Forum: Software - CAD, CAM, Workflow Help
Topic: Struggling with coordinate system on bCNC
Replies: 2
Views: 499

Re: Struggling with coordinate system on bCNC

The standard for CNC machines is for machine zero to be in the upper right and all work to be in negative space.

That said, you can move the spindle to anywhere you want and set your zero there.

See: https://www.shapeoko.com/wiki/index.php ... te_Systems