ShapeOko2 CNC Router

ShapeOko2 CNC Router

Owner/Loaner	PS:One
Serial Number	5549
Make/Model	ShapeOko 2 "The Works" version
Arrival Date	2014
Usability	no
Contact	CNC Area Host
Where	CNC table in the shop
Authorization Needed	yes
Hackable	no
Estimated Value	$1000
Host Area	CNC

Status

Components are all there, but the unit needs some work before becoming fully operational. See "Maintenance" notes below.

Maintenance

10.14.2016 - Danny Blanchard: Cut and installed a temporary MDF board across the back of the machine to mount the power supplies, control board, PWM spindle speed controller, all with the aim to make moving the machine around easier (it will be getting a new home soon, and these loosely-attached components would likely have sustained some damage). It was pointed out that with this backboard in place the ability to feed a large piece of material through the machine has been lost (a great observation that I hadn't considered: this will be changed). Also, the E-stop switch was temporarily moved to inside the frame to aid in moving the machine, but also to giving it a non-dangling-by-the-wires mounting location. I agree that it is not in an ideal location, but I believe that we can find a better, more-permanent solution when this machine gets moved to it's new location (or feel free to modify it now! : ). The current location is not in danger of being crashed into by the spindle, as it is outside of the physical limits of where the gantry and spindle can reach. GRBL 0.9j has been re-loaded onto the Control board after some mis-communication on my part with another user, and the homing function has been enabled but the buggy EMI-susceptible hard limits disabled until I can get some .47uf capacitors installed. After reading some input from other members, I think this machine is nearly ready to be put back into full operational status. But before we do that, there are two things I'd love to see happen: 1. Get the hard limits working (I know they're not needed for every user, but they'll help in keeping the machine from getting out-of spec as quickly due to accidental crashes), and 2. Confirm that the machine is set up to work with a few different tool-chains without having to adjust GRBL settings. Ideally it would be able use Universal G-code Sender or Chillipeppr with whatever CAM program you prefer (Fusion 360, Vetric, others?), but also use Inventables CAD/CAM/Sender Easel. IMO, only having one system or the other would be a bummer. As a last note, I'd like to thank everyone who has voiced their opinions on the changes to this machine: it has all been professional, helpful, and friendly: let's keep up the good work! Thanks!

10.6.2016 - Danny Blanchard: Downloaded and compiled GRBL v0.9j onto the gShield/Uno. Homing and hard limits now work (Pin 12 is now used for the Z-axis limit switch, as opposed to Pin 11 in v0.8c), although I'm still getting the occasional mid-project "Alarm: Hard Limit" that is likely due to excessive RF noise (I'll be attacking this next) from the spindle and other electronics. The machine (by design) will not move until a homing cycle has been run (send "$H" via Universal G-Code Sender command line console). Home position (X0 Y0 Z0) is located on the left side of the machine as you look at it, closest to the operator, and Z homes all the way to the up top. After doing some settings debugging (acceleration, arc, limit direction inversions, feed/seek/homing rate adjustments) I was able to make some basic, yet exciting cuts. First I generated a usable G-code using Fusion 360 and their "Generic GRBL" post-processor setting. After some tweaking on the side of GRBL, I was able to get 2D and 3D Adaptive clearing (HSM stuff) working, as well as helical ramping/boring.

9.12.2016 - Danny Blanchard: Normally Open (NO) Homing switches installed on X, Y, and Z-axis. Positive Z-axis stop plate installed to prevent top of spindle from crashing at the top of it's travel. Each axis has been wired with a 330ohm resistor connected to 5vdc, as seen below (colors in graphic are wrong: X is actually yellow wire, Y blue wire, Z is orange wire, and ground is black wire). V-wheels and rails all cleaned with a toothbrush: lots of gunk (smooshed wood dust, I believe) on the anodized rails. Also replaced some twist-nuts with solder/heatshrink connections, but there is still more to do in that regard. The motion control board (GRBLShield, pronounced "girr-ble, gerbil, or garble": whichever you prefer) is currently running GRBL v0.8C, and I'm having some difficulty getting the homing direction invert setting ($18) to produce any change. Currently the axis move in the positive direction (away from a lower LH zero home) when the $H command is sent, but changing the $18 value from 0 to 1 makes no change. I'm considering compiling the newest version of GRBL, v0.9J, as the versions since 0.8c have addressed various homing bugs which I believe we're currently experiencing. So next step is to compile and flash using the Arduino IDE, and go from there. https://lh4.googleusercontent.com/-FhXABwKcb-I/UvMhBLTESlI/AAAAAAAADCI/kfE-f7jkrwc/s800/cnc_limit_switch_c3.png

9.8.2016 - Danny Blanchard: Drag chain bracket installed, new lock washers installed (machine can now travel freely until it crashes... :). GRBL shield and Arduino Uno were removed and bent/disconnected pins repaired (likely due to rough handling?). E-stop switch backing nut tightened. Machine ran fine on Easel and with GRBL Controller, but it still needs work (below).

9.7.2016 - Danny Blanchard: Machine cleaned, belts tensioned, power supplies temporarily mounted to wall, wires organized and secured with zip ties. Spindle control and E-Stops tested, both working.

Items that still need work:

1. Waste board repaired or replaced. Entire board is unsupported in the middle, causing it to sag. Also, one stud has pulled up a volcano-like mountain in one part of the waste board, and needs to be milled down. Recommend getting two $7 20mmx20mmx300mm extrusions (from Inventables or elsewhere) and T-nuts to support it in the middle (this is a common upgrade for this particular machine).

2. V-wheels/bearings on all axis need to be adjusted to a tighter tolerance. Some are not making contact, gantry is not square to waste board, and spindle is not square either.

3. Spindle PWM, both power supplies, and perhaps the GRBLShield should be mounted in a compact, fan-cooled enclosure. I'd love said enclosure to be part of a full machine enclosure that incorporates noise suppression, interior lighting, and dust collection.

4. Finish Homing and limit switches. They need some RF shielding/Google troubleshooting (search "Limit switch noise GRBL"), as well as adjustable limit-switch contacts on the positive X and Y axis.

5. General wiring clean-up and sheathing: some connectors have bare leads exposed, and I'd love to clean up the build by sheathing many of the wires.

Documentation

ShapeOko 2 wiki for assembly, use, and source files.

GRBL G & M Codes Great G and M-code library of GRBL-supported codes (worth familiarizing yourself with)

Certified Users

qualified member	trained by
Elizabeth	Herself as she built it
Clarence Risher	Elizabeth
Ron Olson	Elizabeth
Darold Higa	Elizabeth
Aaron Mintz	Elizabeth
Michael Solheim	Elizabeth
Eric Beauchamp	Elizabeth
Roger Moore	Elizabeth
Kyle Bieneman	Elizabeth
Andrew Camardella	Elizabeth
Todd Allen	Elizabeth
Sam Reicks	Andrew Camardella
Ray Doeksen	Sevin Strauss
Leon Grossman	Sevin Strauss
Ryan Taylor	Leon Grossman
Simon Pyle	Sevin Strauss
Ralph Brendler	Arturo Duarte
Jeremy fay	Arturo Duarte
Danny Blanchard	Andrew Camardella