New CNC drill I'm building; just about finished

[Stevie]

Overall view of the machine; as you can see it's not quite finished; i have some wires to tidy up and I still need to move the drives under the bench etc; the drill is brand new and was just $69.99 from Home Dept
All the drives I had along with the step motors
It will become a 4 axis very soon; the normal table will be removed and more linear rails will be added below the X axis; this will allow me to cut across the job for flats etc

Close up of the Z axis drive motor and timing belt setup; I removed the return spring for the timing gear wheel; i still need to add a spring to keep the spindle against the gear to stop backlash

Close up of the C axis; this axis will rotate to the exact angle specified by the computer (note; that rotary head was the old head from the lathe before the big update)

General view from the other side; note the use of muffler clamps to hold the stepper drive motor support; the motor is fastened to the Alum angle on a Lexan plate; the drives that control the step motors can be seen behind the unit; the small linear slide in front of the rotary axis will become the tail stock to hold long jobs while they are drilled




What did you build today?

[Stevie]

But will it work




Yes it works
3 rows of holes center drilled 0.5mm deep; 5mm row to row; 30dgr apart

[JFettig]

Very nice, looks good. How rigid is a head like that for the A(or C) axis? Would it be suitable for milling? It wouldnt be all that difficult to get a mini lathe spindle and use that for a 4th axis.

Jon

[balsaman]

What did you build it to do?

Eric

[Stevie]

It will drill my barrels; some have flash holes in the muzzle; i need to drill them
Here is one I'm working on the prototype of the 262 barrel; remember this is the prototype; it's not the finished artical and is not up to scratch as far as my normal standards

This is the biggest cannon ever fitted to the aircraft; just one in the nose; they built 3 of them before the wars end
I'm making these for another Canadian; he's in Austria; and once I get the drilling done by CNC he will cast the resin breech onto the barrel
Scale is 1/32nd



The muzzle is drilled to leave only 1/2mm wall; then a muzzle cap is pressed onto the thin shell
This shell is then drilled with many small holes; the barrel is drilled scale 50mm up inside the thin shell (about 7.5mm in)


This is one long cannon barrel almost 100mm


Another muzzle view

and finally no gun is of any use without rounds


After this I'll be looking to prototype a 30 mm GAU-8/A seven-barrel Gatling gun

[Stevie]

Originally Posted by JFettig Very nice, looks good. How rigid is a head like that for the A(or C) axis? Would it be suitable for milling? It wouldnt be all that difficult to get a mini lathe spindle and use that for a 4th axis. Jon

That C axis is a lathe spindle; and yes it is very ridgid; the drill spindle should be good enough it's brand new; plus i open 4 boxes to chk the spindles untill i found one really tight
I'll be adding a Y axis over the next few days; the drill table will be gone then; and the 2 linear slide mounted right on the machine base; another stepper will control the Y

[JFettig]

Those are very cool,
What I was wondering is would it hold a part while being machined, the stepper and all?
I am considering getting a rotary table, but I do not like the ones available and a spindle from a mini lathe is only about $30 and a chuck is around $40 and I can make/have the rest.

Jon

[Stevie]

It's a 3-1 reduction with 300 oz/in hold; i think small cuts in brass with a 1/16th or 1/32nd cutter will be no problem at all

[Ken_Shea]

As always Stevie, Impressed/envious, thanks for taking the time to share your work with the CncZone.

Ken

[fyffe555]

Stevie,
excellent work again.. I'd like to see the finished model.. is this a flyng model?

The 'biggest cannon ever fitted to the aircraft' might be off though.. The 262 tank buster had a 50mm cannon? The DeHavilland Tsetse (Mosquito varient) had a 57mm ( six pounder molins) rapid fire cannon for killing U boats and shipping with. Weighed over 3500lbs, 18ft long and filled the entire bomb bay. Fired in a dive it would knock 100mph off the speed of the plane. The 130 gunships use a 105m cannon too..

[Stevie]

Originally Posted by fyffe555 Stevie, excellent work again.. I'd like to see the finished model.. is this a flyng model? The 'biggest cannon ever fitted to the aircraft' might be off though.. The 262 tank buster had a 50mm cannon? The DeHavilland Tsetse (Mosquito varient) had a 57mm ( six pounder molins) rapid fire cannon for killing U boats and shipping with. Weighed over 3500lbs, 18ft long and filled the entire bomb bay. Fired in a dive it would knock 100mph off the speed of the plane. The 130 gunships use a 105m cannon too..

I ment the ME262; i know other aiircraft had bigger

[Stevie]

STAY TUNED; I'M GOING TO ADD A 2ND SPINDLE AS WELL AS THE FORTH AXIS

Humm caps lock