Search found 102 matches

by bjbsquared
Sat Aug 31, 2013 11:48 am
Forum: Electronics
Topic: XStepper: New complete Hardware GRBL solution.
Replies: 459
Views: 62554

Re: XStepper: New complete Hardware GRBL solution.

I was looking at it the other way around: will the LED and its resistor act as a pull-up, making another downstream pull-up resistor unnecessary? Most circuits I've seen for limit switches include an additional, external pull-up, either added by the user (for basic switches) or on a breakout board ...
by bjbsquared
Fri Aug 30, 2013 1:58 pm
Forum: MakerCAM
Topic: Eveery thing messed-up
Replies: 11
Views: 2401

Re: Eveery thing messed-up

If you want to go away from Inkscape, you might give TinkerCAD a try; I love it.
If you like tinkerCAD thn I suggest you give 123D online app a try. It's like Tinkercad on steroids.
by bjbsquared
Fri Aug 30, 2013 11:13 am
Forum: Electronics
Topic: XStepper: New complete Hardware GRBL solution.
Replies: 459
Views: 62554

Re: XStepper: New complete Hardware GRBL solution.

On my 3D printer I put the LED at the endstop. This made it easy to dial in the endstop as you have a visual indicator right where it is needed. I recommend making a small break off boards that would hold the LED, resistor and mount the switch too. Have pads to accept wires from the driver board for...
by bjbsquared
Wed Aug 28, 2013 10:42 am
Forum: Design Ideas
Topic: 1000x1000 Thoughts
Replies: 19
Views: 3689

Re: 1000x1000 Thoughts

Finally got my brackets completed. Now investigating how to ensure the table remains square. Initial bolt up and the Y Axis appears to be off about 1/4 an inch from left to right side. I assume the lowers that are bolted to the extrusion are slightly tweaking the table, but unsure. Will have to loo...
by bjbsquared
Tue Aug 20, 2013 1:41 am
Forum: Build Logs
Topic: Chris Buildlog
Replies: 24
Views: 8088

Re: Chris Buildlog

I like it!

It looked like a terrarium at first because of the light.

Time to feed the 'Oko!
by bjbsquared
Tue Aug 20, 2013 1:34 am
Forum: Design Ideas
Topic: A Shapeoko-inspired fast(?) machine
Replies: 10
Views: 3094

Re: A Shapeoko-inspired fast(?) machine

If you will check the shaft portion does not move in any x, y, z direction and so does not contribute to the moving mass of the machine. Bob That's not quite the way I see it. It has a rotational mass. Even though it does not move in any x, y, z direction it has rotational momentum that stores kine...
by bjbsquared
Tue Aug 20, 2013 1:26 am
Forum: Design Ideas
Topic: 4th axis setup
Replies: 12
Views: 3570

Re: 4th axis setup

The drill could get you speed and power to remove lots of material while the geared down stepper would give precision. One or the other could be powered. The gearbox stepper side should ratchet/freewheel as to not have to drive of the reversed torque of the stepper and gearbox.
by bjbsquared
Tue Aug 20, 2013 12:03 am
Forum: Design Ideas
Topic: A Shapeoko-inspired fast(?) machine
Replies: 10
Views: 3094

Re: A Shapeoko-inspired fast(?) machine

If mass movement is a great concern you might think about losing the driveshaft and use motor on the other side for the Y.

Another thing to consider early is cable management. It took me longer to choose and route cables the way I liked more than it did to build the rest of the machine.
by bjbsquared
Sun Aug 18, 2013 5:13 pm
Forum: Member Projects
Topic: Monitor Frame and Boom
Replies: 0
Views: 957

Monitor Frame and Boom

Here is the frame finally cut. I has some challenges with the thin wood not laying flat on the bed. I think I need a vacuum table.
photo-10.JPG
Back Side
photo-10.JPG (127.25 KiB) Viewed 957 times
This was designed in 123D Make and cleaned up and arranged in DraftSight. I CAMed it with CAMBAM.
photo-11.JPG
Front Side
photo-11.JPG (121.04 KiB) Viewed 957 times
I still need to glue it together.
by bjbsquared
Sat Aug 17, 2013 7:35 pm
Forum: Software - CAD, CAM, Workflow Help
Topic: Drills on cambam with a script
Replies: 10
Views: 3196

Re: Drills on cambam with a script

I just ran into this G81 problem for the first time with grbl.

I decided just to specify a 0.126" hole using my 0.125" bit and went with the spiral action in CAMBAM.