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By CHJ
#1208706
As mentioned Elsewhere I've embarked on trying to put together a small CNC Router to use in combination with my turning bits.
It's going to be long job I suspect but it should stimulate the old grey cells a bit over the coming months.
Root3Lite.jpg


Base and Side Panels are the key to the alignment of everything else so I chickened out and purchased them ready cut from the Designers Web Site
Base and Side frames.jpg

I've started on the finishing off of the Side Frames by sealing with sanding sealer prior to painting to keep out any moisture and look a little smarter.

And embarked on doing the same with the Base Board but decided to sort out the clamping fixing insert nuts before any sealing and finishing.
First a trial on a back position, (least noticeable if it goes wrong)
Base Insert Trial.jpg

Then Drill out all the rest of the matrix and slightly countersink holes.
Basedrilling.jpg

This is when you appreciate a basic Pillar drill with wide throat capability, not the best for precision engineering but a boon for sheet wood tasks.

I will use the Pillar Drill to inset the Insert Nuts to ensure they go in as true as possible just so they look neat.
InsertInstallation.jpg


Think I'm going to lip the edges of the Base to hide the Ply layers, just for the aesthetics, time is not going to be a limiting factor on this while I procure the bits and pieces.
User avatar
By Brandlin
#1208839
I've built a couple of CNC Routers. For educational purposes. And i've contributed to a few others' projects with mechanical knowledge. My first job back in the late 80's was working with a CAM software company developing G-Code generators. Moved on to many other things since.

The main thing that small scale CNC machinery fails on is Stiffness. Not to be confused with strength. If your main components are already wood and 3d printed elements then you're going to be quite limited to the materials you can cut and the size of cuts you can make. However it can be an enormous amount of fun just to build, and if you know the limitations of your machine and use it accordingly it can be very enjoyable.

I don't subscribe to the "woodworking establishment" that using CNC tools is "not woodwork" either.

Looking forwards to following this. Ask if you need any advice. Above all HAVE FUN!

PS - pet hate.... CNC is not a noun. :-)
User avatar
By CHJ
#1208842
Not expecting to task the capabilities, it is after all based on a 3D printer control mechanism so limitations are pretty obvious.
Just have ideas of using it to decorate or provide more accurate segmented or inlaid designs to incorporate in my turning projects, and cutting traverse speed is not a priority so loads on the cutters should be small.
No deadlines to meet other than trying to complete the build sometime in the near future, actually producing something at all will be a bonus.

Will be a whole new learning curve on my part catching up with the electronics and computer design side, I've been retired from the active side of such for 23+ yrs. now and things have moved on somewhat.
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By CHJ
#1209031
Sealed and painted the Side Frames.
Painted Side  Frames.jpg
Painted Side Frames


Did likewise with the Base Panel and added some Mahogany edged trim, It might as well look neat even if it never gets to work. Might know the spares bin did not have enough thread inserts so will have to wait until a visit to town to get a few more to complete.
Trimmed Base.jpg
Edge Trimmed Base Panel
By julianf
#1209042
I can't help thinking that you should have used the CNC machine to drill the holes in the base... : )

(I realise the out of range ones would not be possible)

Have you chosen a spindle yet? I would have to recommend kress (who have just gone bust, but don't let that worry you!). I looked at my kress fme 800 unit the other day and saw the service sticker on it from about 5 years back. It sometimes runs 10 hr jobs back to back in a pretty grim environment (non ferrous, with cutting fluids) and I'm amazed it still lives. I have a spare fme 1050 waiting for it's demise. There is a registered kress agent who does repair work very very reliably too.

You can get Chinese spindles which would, on paper, seem preferable, but I can't see them lasting as long. The only issue with the kress units is that they are loud.
User avatar
By CHJ
#1209049
julianf wrote:I can't help thinking that you should have used the CNC machine to drill the holes in the base... : )
Chicken and Egg situation & there's a risk the Chicken could have died of old age before we get there :)

julianf wrote:Have you chosen a spindle yet?........
Nowhere near thinking about that yet, inundated with information from the FaceBook group and numerous internet sources in what is a new subject for me, last time I had anything to do with a 'Real' machine was to sort out the installation of something that arrived in a large packing crate as a result of a requirement requisition.
Will no doubt be shouting loud for guidance and recommendations as I get somewhere nearer the decision.

Thanks to those that have offered advice if needed so far both on line and behind the scenes.

Currently Negotiating the " How big is going to be" "How big's the power supply and computer bit" AND " Where is it going to live".
Anyone would think some folks around here have had experience in this field before.
By julianf
#1209056
Have a look here -

http://thebeast.co.uk/?page_id=21

this is me, and the sort of stuff i do (not wood work related!)

So i have some experience of small scale cnc work. The machine that lot were cut on was built by me the best part of a decade ago. I may (or indeed, may not!) be able to answer some of your questions as they come up.
User avatar
By CHJ
#1209062
julianf wrote:Have a look here -
http://thebeast.co.uk/?page_id=21
this is me, and the sort of stuff i do (not wood work related!)

So i have some experience of small scale cnc work. The machine that lot were cut on was built by me the best part of a decade ago. I may (or indeed, may not!) be able to answer some of your questions as they come up.

Very professional standard output julian, It's almost certain I will need advice and guidance when I get nearer the working end of the build, just concentrating on the basic mechanical support stuff for the time being, then try to get my head around the electronics and stepper drive in this design, although I have good support on that side from family as it's basically the same as the printer that produced the bits so far, one of the main reasons for using this Root3 Light design.

As regards the choice of spindle driver, collets cutters etc. , I have a good understanding of the technology involved but no experience of the current standards and range of cutters etc. so will no doubt be shouting for recommendations from yourself and others to try and avoid buying something unsuitable.

Of course that area is inter related with the power supply (voltage/current) and the drivers, but not thinking too much about that until It gets to be a holding point.
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By CHJ
#1209771
Main Metal bits Cut to size, and Y Rails assembled ready for fixing.
Remembered to thread some wires through for limit switches etc. Overkill at the moment but easier to cut off surplus than dissasemble to add at later date.
YRails1.jpg
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By CHJ
#1210389
Started assembling some of the more obvious bits so that I can plan a bit more on a sequence that may avoid having to disassemble because I forgot something that needs access to secure.
First Assembly Trials.jpg


One little interesting fact that emerged was that little nuts dropped carefully into cavities in sets of 4 or 8 have a penchant for falling back out when you turn the part over to trial fit in place.

Solution, use temporary plugs of coffee stirring sticks in loading cavities to keep them in place whilst you play and until screws are finally engaged.
nut wedges1.jpg
nut wedges2.jpg
User avatar
By CHJ
#1210392
Progress is going to be slow with the rest of the mechanicals, some of the bits are on a slow delivery and I am ordering bits in series at each stage.

Supposed logic being that I will get some of the other tasks that are accumulating completed in parallel.
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By CHJ
#1211302
First batch of Bearings arrived, (40off) so was able to do a trial assembly of the Y carriages, who knows they may even stay put with a little tweaking.
First Bearings.jpg
First Bearing arrival
Left-Y-First Fit.jpg
Left-Y-Carriage
Right-Y-First Fit.jpg
Right-Y-Carriage
User avatar
By CHJ
#1211487
X Carriage fit started, running reasonably smoothly at this stage, so many minor variables that final running fit is sure to need tweaking, be interesting to see after Z Axis lead Screw and Motor Clamp rails fitted.

In the mean time, something to play with and wear in the rails.
X carriage ass1.jpg
X carriage ass2.jpg
User avatar
By CHJ
#1211958
Lead Screw and Linear bearings arrived, so turned up the lower Lead Screw Collar.
LScollar.jpg

Not much else can be achieved until some more bearings arrive but at least there is progress.
Lead Screw.jpg
Z axis ass1.jpg