Hi MC, one thing I have been looking at is air operated turbine motors for the cutting head. They are available and adaptable to cnc.This would unclutter the machine in the cutter-head area and reduce the need to run electrics to the head , with a simple clip-lok air hose . Maybe in conjunction with a venturi for the vacuum hold down. Just ideas at this stage......
I have not yet explored the possability of using air motors on these. Had researched them years ago for a different project though; I can see potential there. I would like to see any links/info you may have found on them.
Posted a new video to our youtube page. http://www.youtube.com/watch?v=PRH5ECOScEE This latest machine to go out last Monday further improves on the design platform we have come up with. We have eliminated the angle aluminum bearing rub rails on both the X and Y axis yet at the same time have increased the number of bearing surfaces. This shaves the fabrication time a great deal.
Build times have also been greatly reduced through the process of forming aluminum plate into the housing for the Y/Z carraige. What used to be as many as 15 individual parts has been simplified and strengthened to only 6 main parts.
[img_assist|nid=1055564|title=Formed metal Y/Z carraige|desc=|link=none|align=left|width=0|height=0] [img_assist|nid=1055565|title=Outfitted carraige|desc=|link=none|align=|width=0|height=0] [img_assist|nid=1055566|title=Upper and lower carraige body|desc=the first prototype carraige assembly|link=none|align=|width=0|height=0]
The formed metal carraige has also opened the door for more components to be built the same. Fewer individual parts also strengthens the functions of the axis and provide less harmonic vibration. I have another machine on the mock up bench currently, and have begun prototyping several other main components for the gantry using this method. Pics to come when I can : )
MC
Hi Muzzer, a few pics.....my profiler is bare bones budget......most of this stuff is at your local hardware............the steel frame is overkill
Hey kayu, do you just plane in the concave after profiling?
[quote="$1"]
Hey kayu, do you just plane in the concave after profiling?
[/quote] Hey, tubedemon....flat top and bottom.....sometimes camber the deck......you can't do a lot with a static single curve.....except profile !..!!
Thank you for posting up the pics and answering that question Kayu - helps
explain the need for a sub-carriage on the Y axis to follow the profile
and generate the foil over the length of the board. Over the years one of my primary objections to profilers has been having to keep multiple templates on hand leading to a compromise of maintaining more generic curves that result in a product which is fine tuned after the machining.
Are your curves the rail line or the stringer line? could you post a pic of a profiled board? thanks
Thx for sharing the pictures Kayu,exactly the parts i wanted for ideas!! love the idea of car jacks for adjusting the height of the board! Will be getting materials real soon.
Will post pics as i go
Stringer line......the general profile....you can alter the thickness , but not much.........I have seen some guys use a bridge for concaving , but I would rather do that after the profiling is done...................basically (particularly if you set up an efficient dust extraction system) , it turns a messy job into a tidy job , and saves a lot of time.
Brian , you can check these guys , to get some interesting performance specs....( 25000 to 90000 rpm!)....I had the web adress for a Melbourne(Aus) company that were converting 1 electric cnc every month,,,,,but I cant find it..........airturbinetools.com
Sounds like dental drills writ large.
This picture speaks volumes. So many questions answered with this one picture!
I have been thinking about something similar for my wood rail system. I have tried a variety of different methods of cutting the rocker into the bottom of the rails, but all of them leave something to be desired. This looks like it could work for me. Probably still have to do some rough cutting ahead of time, but this could be very effective for cleaning up the cuts on the rail rocker with a measure of precision!
Variations on a common theme.
Here’s my one. It’s rough but it’s square and it works well, I kind of just made it up as I went along, used to have the quick grip things like KR’s one but I was off them so went for wing nuts. As you can see it’s made out of a door and sits on top of my stands then I lift it up and store it on the celing of my bay in the corner. I think all the MDF and timber stuck to the sides will stop it bowing…hasn’t bent yet. I don’t have wheels on my bridge it just slides over the templates. I only cut short boards on it.
Best/fastest way to make a new profile I’ve found is to cut a a nice clean strip 15-20mm wide off your sheet of MDF board, drill/fasten and bend it along the curve you’ve drawn…rocker stick…or glued on from Boardcad…whatever…then run a flush trim router bit over it.
Still takes ages to make a new set of templates, don’t give up the planer, or can the whole project and go to the APS machine.
Nice job Huck !......candle wax on the sliding bridge maybe ?
Yeah, Nice job Huck !
Imagine that router carriage with a tensioned hot wire positioned on the underside… You could easily cut ( hot wire) rockers from slabs of foam with that jig as well…And perhaps some skateboard wheel (roller) bearings strategically located to smooth the fore and aft operation…
I realize you like to work with wood, but your jig can be modded for both foam and wood…
Nice use of a door…somewhere a house goes cold?
With my one I need to adjust the curve in the nose of your profiles. Because of the width of the bridge it cuts shallower on the deck side and deeper on the bottom.
Someone asked Kayu if his profiles are of the rail or centerline rocker. Kayu your bridge looks like it’s set up to cut Vee? With concave boards my bottom profile curve is the rail curve then I cut the concave in.
Any surgestions to doing things better?
[quote="$1"]
Nice use of a door...somewhere a house goes cold?
With my one I need to adjust the curve in the nose of your profiles. Because of the width of the bridge it cuts shallower on the deck side and deeper on the bottom.
Someone asked Kayu if his profiles are of the rail or centerline rocker. Kayu your bridge looks like it's set up to cut Vee? With concave boards my bottom profile curve is the rail curve then I cut the concave in.
Any surgestions to doing things better?
[/quote] ...Hey Marsh, my rise and fall set up ( and micro adjustment on the router ) allows me to set the depth of the cut , in line with the side profiles. Because it follows the curve with 2 points (the bearings) , there will be a small difference , but not enough to worry too much....its a few mm.....I dont cut vee , just roll the deck sometimes, and always make templates to the centreline profile
Good work, thanks for sharing. I want to build one as soon as i have some time. What about the router bit? Is the kind of the cnc machines or something more ordinary.
Thanks again.
Gaston
do you still have it? im interest to get one in Portugal…