Search found 132 matches

by aldenhart
Wed Oct 31, 2012 11:09 am
Forum: Electronics
Topic: Tinyg vs grblshield vs Uno+stepper sheild
Replies: 7
Views: 1824

Re: Tinyg vs grblshield vs Uno+stepper sheild

I've been w/o power or I would have responded a bit earlier. THe grblShield also has a Shapeoko bundle which includes a pre-programmed Seedstudio Arduino and the grblShield so it's plug and play.

--Alden
by aldenhart
Mon Oct 22, 2012 1:02 pm
Forum: GRBL
Topic: Arduino Mega 2560 & RAMPS
Replies: 16
Views: 12381

Re: Arduino Mega 2560 & RAMPS

The grbl acceleration management (planner) was ported into a few of the 3d printer firmwares last year, of which Marlin is probably the most widely used (and that's the one Bart Dring mentions in his post). It is not more sophisticated with jerk - it's still a constant acceleration planner. The Jerk...
by aldenhart
Sat Oct 20, 2012 12:56 am
Forum: Electronics
Topic: Dual Motors of one driver.
Replies: 27
Views: 10291

Re: Dual Motors of one driver.

Let me know how it goes.

Alden
by aldenhart
Fri Oct 19, 2012 12:13 pm
Forum: GRBL
Topic: Arduino Mega 2560 & RAMPS
Replies: 16
Views: 12381

Re: Arduino Mega 2560 & RAMPS

Last I checked Grbl does not work on the Arduino megas. I think you would be in for some C hacking if you wante this to work. You might want to check in with the grbl github group on this.

--Alden
by aldenhart
Fri Oct 19, 2012 12:08 pm
Forum: Electronics
Topic: Dual Motors of one driver.
Replies: 27
Views: 10291

Re: Dual Motors of one driver.

I have not tried this, but this is how the Ultimachine RAMBo board runs the Z axis. Tell you what, try it on the grblShield, post your results. If you blow the board (which you shouldn't) we'll send you another. Then we'll all know for sure.

Alden (@synthetos)
by aldenhart
Sun Oct 14, 2012 8:13 pm
Forum: Electronics
Topic: Need help with Y axis power
Replies: 10
Views: 2715

Re: Need help with Y axis power

It's beginning to sound like the motor or the Y axis mechanicals. Is the Y axis as easy to move as the X by hand? They should be about the same.

--Alden
by aldenhart
Fri Oct 12, 2012 3:48 pm
Forum: Discussion
Topic: PRINTING
Replies: 11
Views: 2532

Re: PRINTING

Evidently the history of reversing the polarity goes back at least to the 1890's. So it HAS to work.
http://tvtropes.org/pmwiki/pmwiki.php/M ... sePolarity
by aldenhart
Wed Oct 10, 2012 3:53 pm
Forum: Discussion
Topic: "fireball x90" ?? (a buddy mentioned)
Replies: 6
Views: 2368

Re: "fireball x90" ?? (a buddy mentioned)

Agreed about the cost difference between the Shapeoko and the Probotix. They are not comparable.

FYI: I'm running the Probotix with some surplus Lin Engineering NEMA23's, and using the same electronics I'm using for the Shapeoko - the grblShield or the TinyG, depending on hat I'm testing.
by aldenhart
Mon Oct 08, 2012 10:45 am
Forum: Discussion
Topic: "fireball x90" ?? (a buddy mentioned)
Replies: 6
Views: 2368

Re: "fireball x90" ?? (a buddy mentioned)

I have both a Shapeoko and the Fireball. They are good for different things. The fireball can do heavier materials as it's a screw machine (XY and Z) not belts. It's pretty fast for a screw machine with 0.200" (5.08mm) X and Y pitch, but nowhere near as fast as Shapeoko. And as Cvoinescu points out,...
by aldenhart
Sun Oct 07, 2012 1:01 pm
Forum: Electronics
Topic: Need help with Y axis power
Replies: 10
Views: 2715

Re: Need help with Y axis power

I'm sorry to hear about your issue. If the pot rotated freely that means there is something wrong with it. We will get you another board. I think you already left an email for us so we'll address that directly. We've only seen the smoke you describe once before, and that was also due to heatsinks. T...