New Machine...cantilevered design project log

[corydoras]

I just started building my 2nd machine, and it is to be a servo powered cantilevered design.

The servos are Sanyo Denki BL Super on the X and Y axis, and stepper for the Z axis, due to weight reduction.

Just finished the framework and the gantry, but still need to make the z akis and the belt transmision for the Y axis.

The X axis ia a Parker/Hauser linear drive HPLA 80 with a 4:1 reduction on a planitary gear.

The Y axis are 2 x 25mm THK linear guides and are to be belt driven.

Working area for the mill are gonna be 1850 mm x 1200 mm and approx 70 mm on the z axis

Here are some pictures from the build, and theres gonna be more.

Please feel free to comment the construction and keep em good ideas coming

[Glidergider]

Wow, that's a cool design. I hope you have an overhead crane installed above it. It must weigh a bunch. The cantilever design will be very conveniently and provide lots of access to the cutting materials. Is this really a wood cutting machine, or do you plan another type of cutting head planned? The design makes me think of a plasma cutter. Its going to be a nice machine, no matter what kind of head you have installed.

[corydoras]

Its gonna be a wood maschine, and the machine is made into severel parts that are boltet to make movable and to make it fit trough my basement doors.

Its not as heavy as it looks, but plenty rigid fo my kinda work.

The gabtry weighs aprox 120 lbs but I can move it on the linear guides with my little finger.

Yes the cantilevered design makes it very accessible.

Thanx for the comments

Cory

[walter]

Hey that looks cool!

[Glidergider]

Cory,
Just curious, what kind of work, professional wood carving or is this a hobby machine?

[corydoras]

Just a hobby machine, needed something bigger and better than the first one I made.

http://www.cnczone.com/forums/showth...ght=angel+2000


Painted tha parts and are going to start making the z axis now, as I wait for my timing belts and pulleys to arrive

Cory

[cabinetcraft]

Good luck on the cantilever design. Make it a stiff as possible and then double that times 2. We have a large cantilever router at work from Europe and it does OK until you get out towards the end of the Y axis and then the quality of the cut starts to go down. I'm used to 3/4 red oak at 500 ipm+ but not on this one armed bandit as once your past center on the Y axis there is too much flexing and everything goes to H**l. Make it very rigid and then some. Looks really good though, what you going to use for a spindle?

[Glidergider]

There are thousands of guys who would love to have your first cnc machine. Very nice. This second one is going to be even bettter. I have the JGRO for about 2 months now, and I already want a bigger cnc.

I see you are a RC airplane guy. Do you cut molds with your cnc? Someday, I plan to do that, but of course I'll have to expand the cutting table first.

[corydoras]

Did a test run on my x axis today (the parker/hauser linear drive)
Jogging back and forth with me STANDING on top of the carriage......about 180 lbs....and no problem at all.

I have a 4:1 planetary gear on it and i jogged at about 12000 mm/min

Hopefully this will be enough to convince me that my 120 lbs gantry will runn smoothely on rapid moves.

Will post more pictures as the build progresses

Cory

[corydoras]

Well here are some more pics from the build.

Got the x and the y axis in place and have done some test runs aon 65000 mm/min....man that is fast...and will of course not be able to cut at that speed, but the rapids are fun.

Video coming later today.

Not completely happy with the gantry motion some small vibration and backlash....hmm I am using AT-10 timing belts and 4:1 planitary gear..

Cory

[Glidergider]

Looks like you could build seats on top of that gantry, charge $5 and give a pretty exciting ride on that thing. I'd pay. Wow, I'm impressed with the speeds.

[corydoras]

Thanx Glider..

Mabye I´ll use it for that if it doesn´t get accurate enough.

Maby I´ll have to rebuild the gantry....its awfully heavy an maby not as rigid as I hoped for.

Here is a video of some movements at 50000 mm7m

http://youtube.com/watch?v=3MoU7KRB1AA

enjoy, and please comment

Cory