Clipper

Know it is getting a little repetitive, but I couldn’t resist making just one more of these.  Sure I’ll make more, but you don’t need to see them all (unless you want to!)

This was a pretty easy one to cut out, but I found the design had left out a number of hull sections, so that was a bit of a problem, and the assembly directions were ordinary as well, so a number of parts got broken and needed replacing as I worked out a new assembly order.

However, neither of those took as long as tying the sails into position!!

ship-1 ship-2

Cut out with a 1/16″ solid carbide straight cutter router bit (Toolstoday.com), running at 50mm/sec, and at 12000 RPM (I’d run it much faster, but I don’t have spindle speed control at the moment)

Divide and Conquer

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It is an interesting tool.

Capable of performing a function that would normally require a tape measure, calculator, and a number of measurements and marks to achieve.

Yet can do so without a single calculation, and in one step, not many.

So what can this tool do?

Take a board of a wide variety of widths, and divide it evenly across the width into anywhere between two and six parts, without having to actually measure the board width once.

PWS-5

PWS-6 

 This is the Point.2.Point, available from Professional Woodworkers Supplies.  Simple concept, simply executed.

Owl’s Life

Bit of a test day today (isn’t every day?!)  Wanted to see how some new bits from Tools Today would go with the nested projects I have been working on recently.  Today’s test was on a scary looking bit – but not scary because it was big and mean looking – quite the opposite.

This bit is super fine, and a whole 1/16″ (1.6mm) diameter solid carbide cutting tip.  It looks way too fine and fragile to use, let alone in a CNC router!  However, I wanted to see if it could work, as it is currently the largest bit that I have that will cut 3mm MDF and not create oversized, and therefore sloppy joints.  This bit in question is the 45190 Amana Tool straight cutter – 2 flute, and is not up/down or compression.

Thought it would break in a heartbeat, but hoped not.  Even so, I slowed the feed speed down to 50mm/sec.

The result?  Not only did it survive perfectly well, it cut really cleanly, and did not have a tendency to try to lift or move the MDF around, even when the distances between components was at a minimum.

I’ll get more detailed views (and video) of the bit in action at another time.  What I was left with after my testing was this fellow.  The bit performed admirably – I’m sure they have a reasonably high attrition rate, but so far there have been no dramas, or casualties.

Owl-1

Owl-2Cool little guy, and probably not far off life size!  Still I might try him in 6mm MDF next!

Episode 114 CNC Master Collection

Work in Progress

While I wanted to wait until the project was complete before showing it, I have just finished a mammoth step, so decided to share the progress.

Starting with a slab of American Walnut

DSC05827It has been resawn into two pieces, and joined together to create a slab of the required width

Then, after 24 hours of solid routing on the Torque CNC

DSC05838And a quick initial application of Danish Oil (as much to find where I need to do additional sanding), the result is starting to show some promise. (The gauges are only to test fit, they will not join the project until it is pretty much complete).  The top station (the celtic design within a circle) is not just decoration, it will also be a clock.  The gauges are all high quality German-made ones I bought from Carbatec.

DSC05849Exhausted getting this far, and I still have to have it finished by Sunday!!  And tomorrow is a day away from the shed :(

Big push at the end coming – how unusual………

A logical conclusion

Using the same steps discussed in the last entry, I have taken a vector drawing of a Celtic Cross (created by “CarveOne” on the Vectric Forum), and produced a 3d rendering of the design.

This is the first time I have really tried using multiple paths on the same object.

The first pass was a roughing pass – used to remove as much of the unwanted timber as possible with a strong router bit, and higher feed rates to perform the task quickly.

DSC05816For this I used the 46294 3D carving bit from Toolstoday.com  It has a Zirconium Nitride (ZrN) ceramic coating, so this bit is also appropriate for routing in aluminium, brass, copper, cast iron and titanium alloy.  It makes very short work of the camphor laurel!

DSC05818There wasn’t a lot of material that needed to be removed, but it is still a worthwhile step to minimise any unnecessary load on the finishing step (and router bit).

DSC05820The final design was then carved using the 46282 3D carving bit.  This has a 1/16″ diameter tip, so can really get into the details.  Even so, there is a bit that is even finer, if even more detail is required (with a 1/32″ round nose tip).

I was using these at around 80mm/sec.

Once the design was cut, I swapped over to a solid carbide 1/8″ upcut bit to first cut around where the gaps were meant to be inside the design, and then to cut around the outside, down to about 12mm deep.

DSC05822For a sense of scale, the cross is about 300mm high, and 200mm wide.  Straight off the router bits, there is no need for sanding where the carving bits have been.  There is a bit of feathering on the outside of the cut out, but that is both a function of the timber, and insufficient router bit speed.

I deliberately didn’t cut all the way through the timber, so there was no need for tabs to hold the cut pieces in place.

To release the cross from the surrounding material, I turned the whole thing over, then ran a basic flattening profile on the back, taking off 2mm at a time with a surfacing cutter – using the RC2248 replaceable tip cutter.

DSC05825

Once this cut down to the required depth, the cross was released.

Each project presents different challenges, so I get to know more and more about how to use the CNC router effectively, and how to incorporate it as another workshop tool.

I had a look back at some tests I did on the CNC Shark using 3D carving bits – the finish I am achieving here is chalk and cheese compared to my early experiments.  I don’t know if I can attribute it all to the platform, but having such a solid, heavy duty CNC router certainly is not harming the finish that I can now produce!

 

Chinese Dragon

Plans from MakeCNC

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