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Forum topic by rawdawgs50 posted 819 days ago 3050 views 15 times favorited 43 replies Add to Favorites Watch
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rawdawgs50

81 posts in 1649 days


819 days ago

I supposed some of you might be interested in seeing this so I am filming a bit as I bring it to life.

This is a 4’x5’ CNC Router that will have a rack and pinion setup. If all goes as planned, it should prove to be a big help to production and allow me to take on jobs that were to time consuming before.

I have quite a few months of research and design and parts selection into this….it should work as planned…if not, I am committed to making it work as planned. A little revision along to way never hurts.

My two goals were to build a machine around my wood working needs first and then for a cost of less than half of what it would be to buy one this size. It is not inexpensive to build this, but very cost effective when looking at the alternative.

My benchmark for a good CNC for my needs is the ShopBot. While this one will not have all the bells and whistles…its the accuracy I am aiming for.

Video Here:
http://www.youtube.com/watch?v=WGZvk1RVWXA&feature=g-upl

-Jason
Wetland Wood Works


43 replies so far

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helluvawreck

15623 posts in 1498 days


#1 posted 819 days ago

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

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Mainiac Matt

3887 posts in 960 days


#2 posted 819 days ago

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!

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rawdawgs50

81 posts in 1649 days


#3 posted 818 days ago

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 1649 days


#4 posted 815 days ago

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 1649 days


#5 posted 808 days ago

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wildbill001

99 posts in 1273 days


#6 posted 808 days ago

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 1649 days


#7 posted 808 days ago

There are 3 different possibilities.

Threaded holes
Threaded inserts
Lag screws

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SASmith

1571 posts in 1618 days


#8 posted 808 days ago

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

-- Scott Smith, Southern Illinois

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rawdawgs50

81 posts in 1649 days


#9 posted 805 days ago

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rawdawgs50

81 posts in 1649 days


#10 posted 803 days ago

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wildbill001

99 posts in 1273 days


#11 posted 803 days ago

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 1649 days


#12 posted 803 days ago

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 1649 days


#13 posted 795 days ago

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 1649 days


#14 posted 789 days ago

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 1649 days


#15 posted 765 days ago

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