samc99us SO2 build

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samc99us
Posts: 270
Joined: Mon Nov 11, 2013 5:20 pm

samc99us SO2 build

Post by samc99us » Sun Feb 09, 2014 3:32 am

Gents,

Time to finally post some videos! First run: http://www.youtube.com/watch?v=th4bwOOt ... e=youtu.be

First test cut: http://youtu.be/cHogFiho63g

Earlier in the week I added 1/4-20 t-nuts to the spoil board.

Did a lot today; mounted a DNP611, for nearly unlimited power. I made the mounts on a Makerbot Replicator, and included a vacuum attachment. Then we made some MDF dust. Man that gets everywhere!!! Need a dust shoe! I also tested out some 3D printed hold downs (design copied from Inventables). They work great! Only thing to note is the vacuum setup; the hose needs to be fixed and not drag or pull on the machine. That results in lost steps!!! Once sorted, cuts were perfect.
Modified Shapeoko 2: 1500mm fully supported y-axis, 1000 mm 4060 x-axis, ACME Belt Drive Z-axis, Dewalt DNP611, full aluminum t-slot table, 4x NEMA23 180 oz/in stepper motors driven by a G540

chomdh
Posts: 179
Joined: Sun Jan 19, 2014 3:43 pm
Location: Bettendorf, IA

Re: samc99us SO2 build

Post by chomdh » Sun Feb 09, 2014 2:01 pm

Looks like you've got it running well. Nice work, I know it takes a while to get to that point.
Let us know your thoughts on the dnp611. I didn't realize that was an option until after I purchased a dw660. Wish I had the speed adjustment, I may have to buy one to plug the dw660 into.

What motor driver are you running? Or is it a standard SO2 full kit?
Shapeoko2 #3702:
DW611, arduino uno, gshield v5, NEMA23's on X & dual Y, NEMA17 on Z with ACME rod, 9mm belts, Mean Well NES-350-24V power supply, re-inforced gantry rails.
Soon to have inventables spindle mount and 1M X axis.

samc99us
Posts: 270
Joined: Mon Nov 11, 2013 5:20 pm

Re: samc99us SO2 build

Post by samc99us » Mon Feb 10, 2014 4:40 am

I owe the group a detailed write up and build process. Machine is:

1) Stock SO2 kit
2) Lin Engineering - 5718X-05E-03 unipolar stepper motors on X and Y axis. These are NEMA23's, but I thought they had more torque. Appears they are only 65 oz-in. Fine for most things but probably not when I go bigger. I have some 185 oz-in NEMA 23's on hand so not an issue: http://www.alltronics.com/cgi-bin/item/ ... pper-motor, http://www.hobbycnc.com/products/stepper-motors/
3) HobbyCNC Pro Driver Board with a 36v 10A power supply, in an enclosure with heatsinks and a fan.
4) DNP611 router in 3D printed ABS mounts. Will be re-machining these in delrin.
5) 1/4-20 hold t-nuts and ABS hold downs.
6) Custom dust shoe (just completed).
7) Driven with LinuxCNC and VisualMill 2012 for toolpathing.


Been very busy this weekend with the machine. Yesterday we cut some test enclosures for the AUVSI student unmanned aerial system competition out of MDF. Found a few issues; vacuum hose can drag and cause lost steps!! Today I built a dust shoe from 0.20" acrylic. This was troublesome. At 0.05" step down, 15 in/min feed rates and 3 in/min step down the chatter was bad and the machine was melting the acrylic, using a 1/4" end mill. Increasing feed rates to 36 in/min solved the issue. My precise bits collet is in the mail, so I currently am limited to 1/4" cuts. I also found out vacuums are super noisy when going from 2.5" to 1.25" hose. Turns out Shop Vac doesn't have a good fluid flow guy on their team. It works much better connected directly to the dust shoe with the dust shoe touching the spoilboard, whining noise is gone. Definitely need to get some hearing protection though.
CNCWithDustShoe_small.jpg
CNCWithDustShoe_small.jpg (227.52 KiB) Viewed 1544 times
Modified Shapeoko 2: 1500mm fully supported y-axis, 1000 mm 4060 x-axis, ACME Belt Drive Z-axis, Dewalt DNP611, full aluminum t-slot table, 4x NEMA23 180 oz/in stepper motors driven by a G540

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