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Wetland CNC Build

by rawdawgs50
posted 05-30-2012 01:51 PM


43 replies so far

View helluvawreck's profile

helluvawreck

15772 posts in 1518 days


#1 posted 05-30-2012 03:41 PM

I’m an engineer, machinist, woodworker, and Jack of All Trades (master of none). I’m mostly just a glorified Shade Tree Mechanic. I’ve thought about building one of these off and on for a long time. I’m going to favorite this so I can keep up with it if you don’t mind. I wish you the best of luck on it. Thanks for posting.

helluvawreck
https://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View Mainiac Matt 's profile

Mainiac Matt

3990 posts in 980 days


#2 posted 05-30-2012 05:16 PM

If you’re not registered over at the CNCzone….. there’s a ton of good info and helpfull bot heads over there.

Mach III on a garage sale PC, driving a Geko 540 and NEMA 23 steppers makes a very economical package.

You’ll never push Shop Bot speeds, but micro-steppers will give you all the resolution you could ask for.

I’m 80% done with converting a benchtop mill to CNC (project stalled due to to many committments) and am using this combination.

I program for a CNT 900 sereas at work and though we can run upwards of 900 ipm, we seldom push it that fast. Also, with a shorter machine, you’ll never have straight line moves long enough to accelerate to that speed anyways.

-- Pine is fine, but Oak's no joke!

View rawdawgs50's profile

rawdawgs50

81 posts in 1669 days


#3 posted 05-31-2012 01:36 PM

CNCzone is great. That forum helped me a lot from the beginning and I still visit it regularly.

The Gecko G540 and 4 nema 23 motors is the setup on this I am using. Its a little more than others, but it is rated highly for being glitch free. I am not trying to chase electrical demons.

I do not know how fast ipm it will go flat out….but I would not be surprised to see it over 700ipm+ with the gear reduction on the R/P. I am trying to make the gantry as rigid and as light as possible. So even a few pounds less than normal can have a huge affect on acceleration/deceleration.

But like I mentioned before…I will not mind speed…but its accuracy and repeatability I really care about.

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rawdawgs50

81 posts in 1669 days


#4 posted 06-03-2012 12:58 AM

Video 2 is now up
http://www.youtube.com/watch?v=OuYs0ruyKB0

This video just gives insight into the mechanical parts being used, which will become more apparent in subsequent videos. This way it is easier to know what the different components were when you see them.

Also I was so impressed with some new drill bits I purchased that I thought it should be included in the video as well. Maybe you all have experience wit these types of bits, but its the first time I have used them…and after all these years drilling odd metal jobs with my wood working bits…I am again a believer in the right tool for the job. These are made to drill stainless steel and they did not even break a sweat on my 1/4” cold rolled steel.

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rawdawgs50

81 posts in 1669 days


#5 posted 06-10-2012 04:18 AM

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wildbill001

99 posts in 1294 days


#6 posted 06-10-2012 04:32 AM

How are you attaching the 1/4” steel to the plywood?

Bill W

-- "You can tell the pioneers by the arrows in their back" -- Unknown

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rawdawgs50

81 posts in 1669 days


#7 posted 06-10-2012 04:45 PM

There are 3 different possibilities.

Threaded holes
Threaded inserts
Lag screws

View SASmith               's profile

SASmith

1590 posts in 1639 days


#8 posted 06-10-2012 05:28 PM

Thanks for posting the videos.
I am enjoying following along.

-- Scott Smith, Southern Illinois

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rawdawgs50

81 posts in 1669 days


#9 posted 06-13-2012 12:56 AM

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rawdawgs50

81 posts in 1669 days


#10 posted 06-14-2012 11:22 PM

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wildbill001

99 posts in 1294 days


#11 posted 06-15-2012 01:28 AM

Other than maybe you don’t have a kreg jig, is there any reason why you didn’t use pocket-holes for the frame assembly?

Really like the looks of things so far. Keep ‘em coming!

-- "You can tell the pioneers by the arrows in their back" -- Unknown

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rawdawgs50

81 posts in 1669 days


#12 posted 06-15-2012 01:57 AM

I did not to use the kreg for the base because dowels do a much better job at alignment imo. You could use a kreg, or both. Also the way I designed the base frame, the reveal of the leg would not really allow a pocket hole on the back side.

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rawdawgs50

81 posts in 1669 days


#13 posted 06-22-2012 11:21 PM

Video 6 up
http://www.youtube.com/watch?v=50ZTG0TJ8_8&feature=plcp

Installing X axis steel and first look at Rack and Pinion.

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rawdawgs50

81 posts in 1669 days


#14 posted 06-29-2012 01:58 AM

Video 7 Up
http://www.youtube.com/watch?v=JLWWu3JNOmI&list=UUtkFlqdY9x6pq8EDk1RGIhQ&index=1&feature=plcp

Design Change on base and 3d model. Now pocket hole joinery is an option

Also

CNC….meet Color

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rawdawgs50

81 posts in 1669 days


#15 posted 07-22-2012 11:20 PM

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MrRon

2830 posts in 1895 days


#16 posted 07-24-2012 12:59 AM

I am eagerly awaiting more videos. So far, I have learned a lot of new information. Two questions I have (if you are open to questions) is; how did you set the two X-axis rails parallel to each other? and how straight are the 3×1/4 CR rails. I have other questions, but I will save them for another time.

View rawdawgs50's profile

rawdawgs50

81 posts in 1669 days


#17 posted 07-24-2012 05:07 PM

Ron,

The structure is very square. The x axis will self parallel itself by using the gantry and sliding it down the axis. I have not shown the video on that yet…sit tight.

The CRS was pretty straight, it helps to get something straight as can be to begin with. More than likely you will have to coax it one way or another for cnc accuracy.

View Mainiac Matt 's profile

Mainiac Matt

3990 posts in 980 days


#18 posted 07-24-2012 05:11 PM

Hey Jason…

do you have a print set or CAD model you’re working off of?

it would help to follow along your build if we could see a screen shot of the end product

-- Pine is fine, but Oak's no joke!

View rawdawgs50's profile

rawdawgs50

81 posts in 1669 days


#19 posted 08-15-2012 03:17 PM

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rawdawgs50

81 posts in 1669 days


#20 posted 08-15-2012 03:21 PM

ssnvet,

The project is not complete yet, although it is further along than the videos show. I will keep posting them through completion. Once that is done, I will consider releasing other stuff.

I do not want to get ahead of myself here with releasing content before reviewing it, so everything is getting rolled out as I can find time.

Thanks-

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rawdawgs50

81 posts in 1669 days


#21 posted 08-15-2012 03:41 PM

View helluvawreck's profile

helluvawreck

15772 posts in 1518 days


#22 posted 08-15-2012 04:38 PM

Looking good.

helluvawreck
https://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View MrRon's profile

MrRon

2830 posts in 1895 days


#23 posted 08-15-2012 05:04 PM

Jason,
Your videos so far have been a great source for information. They are well put together. This is a series of “how to” videos I will save in “favorits”.
One question: Do the lag screws have a tendency to wedge the plywood plies apart?

View rawdawgs50's profile

rawdawgs50

81 posts in 1669 days


#24 posted 08-15-2012 05:09 PM

MrRon,

Lag screws can certainly do that…but I went to great lengths to prevent this. A quality glue up, proper sized pre drill, lubricated screws with wax before slow setting them, then backed out and hand torqued into place using a washer and a lock washer.

So far so good.

View MrRon's profile

MrRon

2830 posts in 1895 days


#25 posted 08-17-2012 08:34 PM

Rawdawgs50,
Thanks for your reply. I appreciate you taking the time to answer my concern. I have taken a different path in constructing my CNC router, so I must continue along that path. I am using MDO and barrel nut construction based on the “Build your own CNC Machine” website. I see the weaknesses of that construction and look to a more sturdy construction for my next machine. I’m trying to build a machine that uses as many off-the-shelf parts as possible without spending a boat load of money. At present, I’m confident that my machine will work as designed for cutting wood, but ultimately I want to cut aluminum and that’s where evaluation of my current design will come under fire. Good luck with your own project. Looks like it will work great. I hope we can compare notes in the future. I have been bitten by the bug and this project consumes me.

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rawdawgs50

81 posts in 1669 days


#26 posted 08-17-2012 09:05 PM

Thanks Ron and I am glad to hear you are building a machine as well. I would like to compare notes. This is all uncharted territory for me, but like you I am consumed by the project when time allows. I already have ideas for what I might do different,y next time around….funny how that happens before I am even done with this one.

I am taking my time with this build for sure, probably way to much time, but I am trying real hard to get everything as dead on as I can. I can certainly see why others go the 80/20 route…fast assembly time….but half the project for me was just doing something different….and keeping costs at bay.

Good luck with the build and let me know if you post on it.

View MrRon's profile

MrRon

2830 posts in 1895 days


#27 posted 08-18-2012 09:11 PM

Raedawg50,
I’m about halfway through my build and incorporating changes as I go along. I originally planned on using the PC 2.25 hp router, but switched over to the Bosch Colt trim router. I’m trying to cut down on the weight and moments on the Z-axis. I’m also replacing some of the wood parts with metal ones, all in an attempt to make it more sturdy. During this hot weather, I spend more time indoors at my computer redesigning parts. BTW, I’m retired, so I can afford to spend a lot of time on this.

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rawdawgs50

81 posts in 1669 days


#28 posted 08-18-2012 10:16 PM

Video 12 Up – Z Axis

http://youtu.be/WeWxc-Pa

View MrRon's profile

MrRon

2830 posts in 1895 days


#29 posted 08-19-2012 04:30 PM

Looks like you are coming into the homestretch. It looks like overkill, but that’s ok; that’s the way I do things. My approach is similat to yours; wood for the table and gantry and metal for the Y and Z axis, well within the capacity of my mill. Some parts are wood, but I plan to change them out with aluminum parts. I’m not doing that yet as I want to see what the limitations of wood are. If wood works, I will stick with it.

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rawdawgs50

81 posts in 1669 days


#30 posted 08-23-2012 11:08 PM

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rawdawgs50

81 posts in 1669 days


#31 posted 08-30-2012 08:43 PM

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rawdawgs50

81 posts in 1669 days


#32 posted 09-06-2012 08:31 PM

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rawdawgs50

81 posts in 1669 days


#33 posted 09-13-2012 08:39 PM

Video 16 – Bench Testing Motors, Gecko G540 and Software

http://www.youtube.com/watch?v=oM7a1NtfO4U&list=UUtkFlqdY9x6pq8EDk1RGIhQ&index=1&feature=plcp

Its getting close…

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rawdawgs50

81 posts in 1669 days


#34 posted 09-22-2012 10:39 PM

View dannelson's profile

dannelson

147 posts in 1023 days


#35 posted 09-24-2012 12:43 AM

rawdog just wondering what you have invested . if you dont mind. Ive been seeing bots go pretty cheap lately . by the looks of things yours will do the job. it will be interesting to see if it holds up to racking due to cutting under force( gantry staying square to the bed) also cut speeds and accuracy keep us posted ,thanks dan

-- nelson woodcrafters

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rawdawgs50

81 posts in 1669 days


#36 posted 09-24-2012 01:18 AM

Dan,

I do not know the exact amount I have into it, I would guess including all the extras I am putting into it, plus cost of router, the computer/monitor but no software I would be somewhere around $1900-2000 once I finish it depending on what I add.

So considering the size, speed and best quality electronics and motors on the market for a non servo setup that is getting it done on a budget and then some.

Its highly unlikely that my x- y axis will rack at any perceptible amount with motors on both sides complete with gear in track short of a motor failure. Its far more robust as a complete package then without the assemblies on when I had mentioned it previously in the earlier videos. As far as it racking from the z-y…..a bit would snap before that gantry will flex. Its quite beefy.

I tried grabbing the gantry while it was rolling and tried to stop it….not so much. I am pretty sure it could snap your arm if it got pinned. Some how.

What are the used shopbots going for for something this size?

View luthiergeorge's profile

luthiergeorge

4 posts in 718 days


#37 posted 09-29-2012 03:25 AM

Rawdawgs50 ,
I have been folliowing your cnc project for a few months now. I really like your videos and how well you explain in details how your cnc is being built. Have you cut anything yet? I don’t own a cnc YET but I am very interested in your design. Thanks for your ideas.

-- George,Shelbyville,Tn

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rawdawgs50

81 posts in 1669 days


#38 posted 10-06-2012 10:48 PM

Amendment to the above cost estimate. I forgot about some things “here and there” but remember them after I wrote that. I really did not factor into the cost “stuff” I had on hand already. Not a big deal but the cost, again with no software, is probably closer to $2200-2300 as it sits right now. But that will bump up a little more as I start adding in things like control switches, e chain, plexi, some more wiring etc. Then there could be enhancements like a vacuum table, spindle upgrade or a different dust collection etc.

Its a pretty modular setup, so I can modify anything I want relatively easy should the need arise.

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rawdawgs50

81 posts in 1669 days


#39 posted 10-06-2012 10:50 PM

Alright guys/gals…I am going to do a batch update on this. If you have not checked out the vids in a while…its up and running. The only thing holding me back right now is just a little more fool proofing the machine with some ‘limiters’ and then learning the ends and outs of the software packages.

I suspect the software will be an ongoing learning adventure…but there is a little bit of a curve just to get going. Almost there with that.

I have really started to get the machine dialed in while playing with it. Its tight and strong. But the true test is going to be under a hard load. So until that point, I am still cautious, but if its responsiveness and strength during testing are foreshadowing how its going to perform, I think the only thing that will slow it down will be the router not having enough balls to pulverize the wood at rapid speed.

In the last video I am posting today…I hooked up one of my ‘toys’ and made it a very useful tool. Turns out the Xbox 360 controller is good for other things besides sniping enemies in the Call of Duty.

Knowing what I know now I feel I could do this again a whole lot quicker the second time around. Got some ideas good ideas about making a heavy duty water cooled CNC mill, but I would really like to make a 3D printer as well.

These things are kind of like a router table….its a whole lot easier to make one, if you had one to begin with.

Hope you all are enjoying the build.

Video 18 – Building the Router Mount
http://www.youtube.com/watch?v=BRlehGre ... 8EDk1RGIhQ

Video 19 – Mounting the Monitor
http://www.youtube.com/watch?v=nGu4ulnc ... 8EDk1RGIhQ

Video 20 – Xbox 360 Controller Upgrade
http://youtu.be/E30SNLlowk8

View HalDougherty's profile

HalDougherty

1820 posts in 1889 days


#40 posted 10-07-2012 12:09 AM

Great post! Thanks for putting the videos online. Have you thought about building a mount for a Harbor Freight plasma cutter. You could cut metal parts to replace the wood parts on this one and have both a CNC router and a CNC plasma cutter.

-- Hal, Tennessee http://www.first285.com

View Arlin Eastman's profile

Arlin Eastman

2042 posts in 1213 days


#41 posted 10-07-2012 12:22 AM

Thank you for the vidoes I love how you are making it

-- It is always the right time, to do the right thing.

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rawdawgs50

81 posts in 1669 days


#42 posted 10-18-2012 09:56 PM

Video 21 – Fabrication for installing of E-chain
http://www.youtube.com/watch?v=zfvU2GQbKgo&feature=youtu.be

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rawdawgs50

81 posts in 1669 days


#43 posted 12-11-2012 02:15 PM

Took some time off from the build. Lost a little interest due work being so busy this time of year. Now I got a little time to get back at it and hopefully get this cutting soon.

Video 22- Limit Switch installation and Wiring
http://www.youtube.com/watch?v=aYUX-tp3dl0

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