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The bottom of the C-Beam is even with the cross brace/rail that links the two Y axis gantries together. So that is the limiting factor for...
You can shorten, but I found that you can use all of the height - for instance if you have a really long bit, say 2" of cut length, you can raise...
I finally replaced my existing Z axis with a "Plate Maker" style C-Beam linear actuator. It works great! Totally solved the problems that I was...
No problem - good questions. My Ox design also has about 2-1/2" from bed to X beam. So the C-Beam is attached to the X plate, with the bottom of...
For me, I wanted as much surface attached to the X plate as possible, so there is as little leverage as possible from the Z axis being "pushed"...
Reminds me of the Crawlbot from Printrbot, only horizontally. Cool idea for maximizing footprint and minimizing space. Crawlbot | Printrbot -- John
I'm very happy with the Makita. Has nice low RPMs (9,000?) and runs much quieter than the Colt. Smaller (1/8") collets are available from...
Another update to Cebu. I have never been completely happy with the rigidity of the Z axis on the original Ox design. Even with the "extended"...
Cool. Cheton has been very responsive to suggestions that I have made for enhancements. I really like bCNC, but a remote web interface suits my...
I've had a chance to mess with another web based grbl interface that I discovered on github - cncjs. cheton/cnc.js · GitHub It's a bit like...
I am using a Makita RT0700 on my Ox. It's quieter than the Colt, especially at the lowest RPM settings (10,000). So far I've been happy. Have a...
Actually live several hundred miles and a time zone away... Across the street - now that would be dangerous!
Kudos to the Openbuilds Parts Store! My Black Friday order arrived today! I sense a Z axis upgrade to my Cebu build coming soon...
I also have a V2, the header pinouts are the same. I saw the V2 drawings from Spark didn't have it labeled, not sure why! But, I am using V2,...
The A5 pinout is in the black connector by the USB end of the xPRO. I ordered some of these jumpers http://www.amazon.com/gp/product/B00ALQI12M...
You shouldn't have to compile like that from the command line. Follow the first part of the tutorial that @dddman referenced above - Compiling...
Honestly I'm not sure what tweaks were made by the designer. I know there are a couple of versions floating around (3.00, 3.04, and the most...
There is a newer rev of the CNC Shield (3.10) that adds support for grbl 0.9/PWM. The designer sells on ebay under the name "Protoneer". Link...
Yeah, the datasheet for the DRV8825 specifies cooling when driven at 2.5a. Not sure why xpro didn't include. Most of the pololu type step sticks...
That's a great point - drivers do need to be matched appropriately with motors. The data sheet for the DRV8825 recommends heat sinking for 2.5A...
