Search found 228 matches

by scott216
Sat May 02, 2015 2:03 am
Forum: Software - CAD, CAM, Workflow Help
Topic: Upvotes if you use Fusion 360
Replies: 3
Views: 1093

Fusion 360 Post Processor

I took the grbl post processor that comes with Fusion and modified it for Shapeoko. I got rid of the G28 command and replaced it with a z-axis move to the clearance height. I also moved the code that sets the work coordinates earlier in the program so the work coordinates are set before any move com...
by scott216
Fri May 01, 2015 4:35 pm
Forum: GRBL
Topic: Redefine absolute machine coordinates
Replies: 9
Views: 1497

Re: Redefine absolute machine coordinates

Don't use machine coordinates. Use the work coordinate systems and write their offsets using something 'G10 L20' or 'G92'. With these, you can set your coordinate frame to whatever you want. All 0,0,0's or 100000,10000,2030483. Whatever you need. I always work in G55 and G56. One reason I didn't li...
by scott216
Fri May 01, 2015 4:17 pm
Forum: GRBL
Topic: Does GRBL return to metric after finishing a job
Replies: 16
Views: 3231

Re: Does GRBL return to metric after finishing a job

I just read in the wiki you can enter $N to see what $N0 is set too.
by scott216
Fri May 01, 2015 4:09 pm
Forum: GRBL
Topic: Does GRBL return to metric after finishing a job
Replies: 16
Views: 3231

Change GRBL startup from mm to inch

That behavior is correct. Unless you've configured it otherwise, GRBL uses mm at startup. M30 ends the program and returns GRBL to its startup configuration (among other things, it stops the spindle, clears G92 offsets, selects the G54 work coordinate system, and selects mm). GRBL also executes the...
by scott216
Fri May 01, 2015 3:56 pm
Forum: GRBL
Topic: Redefine absolute machine coordinates
Replies: 9
Views: 1497

Re: Redefine absolute machine coordinates

This comes up all of the time. Probably once every couple of months. It's a traditional practice on production machines to have all of the machine coordinates exist in negative space. I'm not 100% sure where it comes from. If I were to guess, it's to help the machine operator to quickly see what co...
by scott216
Fri May 01, 2015 3:42 pm
Forum: GRBL
Topic: Redefine absolute machine coordinates
Replies: 9
Views: 1497

Re: Redefine absolute machine coordinates

This is by design. Machine coordinates are setup to exist in all negative space by default. There is a compile option in the config.h file to force it to set home as 0,0,0 wherever the switches are. You'll have to uncomment HOMING_FORCE_ORIGIN (I think), recompile Grbl, and flash it. Thanks. What t...
by scott216
Fri May 01, 2015 3:13 pm
Forum: GRBL
Topic: Redefine absolute machine coordinates
Replies: 9
Views: 1497

Redefine absolute machine coordinates

I've got a stock shapeoko 2 and I'm running grbl v9g. I have limit switches on my Shapeoko and it's configured to home in the front left corner. When it does, I see the absolute position is a negative number. Is there a way to configure my machine so home is 0,0,0? I know how to use the work coordin...
by scott216
Thu Apr 30, 2015 12:50 pm
Forum: Build Logs
Topic: Scott216 Build Log
Replies: 7
Views: 3808

Alum T-slot plate

I replaced the wooden waste board with Aluminum T-slot plate. I got the aluminum from Misumi: P/N HFSQN4-15250-500
In the pictures you can also see the leveling screws I put on the y-axis rails. These make it a lot easier to get everything level.
Shapeoko Alum Table.jpg
Aluminum T-Slot table
Shapeoko Alum Table.jpg (396.61 KiB) Viewed 2749 times
Alum Table Close.jpg
Close-up pic of alum tble
Alum Table Close.jpg (303.92 KiB) Viewed 2749 times
by scott216
Thu Apr 30, 2015 3:55 am
Forum: Assembly
Topic: Help squaring shapeoko
Replies: 14
Views: 3796

Re: Help squaring shapeoko

Hey Scott, any idea how exactly your friend squared up the cuts on the extrusions? I have the same issue. My machine isn't even running, I picked up the out of square cuts during initial assembly when I couldn't get all my axes moving smoothly. Did your mate cut or mill to get them square? He just ...
by scott216
Mon Apr 27, 2015 6:16 pm
Forum: Discussion
Topic: Stepper Motor Temp when idle
Replies: 2
Views: 403

Stepper Motor Temp when idle

I've got the shapeoko 2 with the Nema 17 motors and GRBL board. I noticed if the Shapeoko is idle for a while (a few hours in this instance), the motors are different temperatures. The two y-axis motors are just slightly warm. The x-axis is warmer and the z-is pretty hot - too hot to hold for more t...