[Makerspace] A CNC machine :)
greghall at brushbox.info
Sun Aug 20 18:17:34 AEST 2017
I've been keen on a flat-bed CNC router for quite some time.
A quick look around reveals some very affordable kits, some with the
precision to route PCBs, which I expect would be popular. Is there
already an accessible such tool in Newy? Do I hear that there's already
one that can be loaned to the 'space? That would be a good way to test
the enthusiasm, at least before launching into a larger or more
Looking up the scale to working in plywood or MDF for furniture or (one
of my favorites) the production of 'Raised Relief' maps would require a
larger home than we have now, but with persistence (and good
housekeeping), we might get to use half of the left-hand side garage.
Another wild thing we might build could be: http://www.maslowcnc.com/
brings a full sheet of plywood and an electric router to the hanging
There's a (probably biased) review of machines at
http://www.scan2cad.com/cnc/best-cnc-kits-beginners/ and a homebuild
that looks OK at http://woodworkerb.com/home/diy-cnc-machine/
woodworkerb points us to http://www.autoleveller.co.uk/ which seems like
a very good way to get better Z-axis accuracy out of these simpler machines.
I'd welcome pointers to reviews and designs that we can trust.
Of Raised Relief maps, we have bought a few over the years from the (now
sadly closed) map shop in Castlereagh St, Sydney, and they are much
loved. Ours were made by Litografia Artistica Cartografica but the
artist retired and it's a very different company now.
The technique is described at
http://www.terrainmodels.com/computer.html & a nice article at
The map we have at home measures 70 x 90 cm, which would be a nice size.
Plaster is the usual material for the master, but Hebel aerated cement
could save drilling the thousands of tiny airways, should we wish to
reproduce them using vacuum forming. Either way, fairly abrasive dust to
be handled by a decent extractor system. I wouldn't want to do this to a
good CNC. This work shouldn't need any more accuracy that can be had
using toothed belts for positioning. We _might_ get away with a
succession of vacuum cleaners;) I suspect this would be a 'take it
outside and do it there' type of job.
On the other hand, if there's a smaller machine to be borrowed, I'm sure
I could constrain myself to friendlier materials like MDF, and make
tiles to fit together until (if) there's sufficient enthusiasm for a
large, dedicated machine. The model of Mt. Kosciusko on the map of NSW
that we have measures only ~27mm high, so pre-laminated MDF or plywood
would be OK.
One of the other projects that I daydream of is smartening up the
building management systems of Pachamama House. Seems to me that the
world could really use an integrated, easy to use and open-source
building control system (temp & air quality control, keyless entry,
power consumption and activity monitoring, etc.) I know that I'd need to
be in Newy a lot more for these to be acheived in any practical
timeframe. I've played a little with OpenHab, now version 2. It's
probably the way to go, but again, advice gratefully received.
On 17/08/2017 8:20 PM, ned haughton wrote:
> Building and tuning a CNC machine? :P
> On 17/08/17 17:57, Felix Sheldon wrote:
>> Maybe we could organise a group project?
>> Wednesday, August 23, 2017
>> 7:00 PM
>> Newcastle Makerspace
>> Rear of 21 Gordon Ave, Hamilton, NSW (edit map)
>> Group project: It will probably be hard to find something to suit
>> everybody, but as long as it's not too expensive or complicated it
>> could be just for fun.
> Makerspace mailing list
> Makerspace at newcastlelug.org
0265 504 481
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