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Old 8th August 2012, 05:52 AM   #351
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Quote:
Originally Posted by jacobthellamer View Post
Hows the CNC coming along?
I'm reluctant to even post as its gone far beyond any sort of trouble I could have dreamed up.

Complications with the Z axis mean a complete redesign of this assembly was necessary. I've done the CAD work and passed it onto a machinist friend of mine who'll cut the parts. Its being done as a favour(ie. cheap!) so its when he has a day to spare. For now I'm back using good old reliable methods!

To say I'm disappointed with the manufacturer of the CNC would be an understatement.

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File Type: jpg Z axis.1658.jpg (243.0 KB, 1647 views)
File Type: jpg Z axis.1655.jpg (265.4 KB, 1641 views)
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Old 8th August 2012, 03:51 PM   #352
sploo is offline sploo  United Kingdom
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Quote:
Originally Posted by ShinOBIWAN View Post
Complications with the Z axis mean a complete redesign of this assembly was necessary.
That sucks. Sorry to hear.

Love the renderings, but, are you sure the vertical arms of the gantry are wide enough to prevent flex (specifically the blocks that run along the longest axis on the machine being far enough apart to make the gantry stable)?

Looking at my much smaller machine, the width of the gantry legs (below where the black box is in your first render) is 8" (~20cm).
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Old 8th August 2012, 05:33 PM   #353
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Originally Posted by sploo View Post
are you sure the vertical arms of the gantry are wide enough to prevent flex (specifically the blocks that run along the longest axis on the machine being far enough apart to make the gantry stable)?
Not really ideal imo.

The spacing on these are 200mm too but without redesigning the entire machine(thought about it!) and spending months and ££££ its something I'll have to learn to live with. In practical terms its going to limit feed rate and DOC but considering the soft materials, wood and plastics, that it'll spend most of its time cutting there are other limits such as the stepper motors lack of torque at higher speeds that'll make it difficult to ever really see the limit. In a sense its a somewhat balanced design there.
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Old 8th August 2012, 09:40 PM   #354
sploo is offline sploo  United Kingdom
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Ah OK, if the width of the uprights are 200mm all the way up then they're sturdier than my machine (200mm reducing down to a smaller width), and I've not noticed problems running a 1/4" bit with a 1/4" depth of cut at 120" per minute (~3000mm/min) through MDF.

You may well be OK with that then - especially as you've got the spindle, which will have way more torque at lower rpm than my router.
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Old 14th August 2012, 10:44 AM   #355
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A few renders of the latest incarnation of the Aurora.

I do like this one although I liked the others as well so that's just a nod towards my indecision! I blame the CNC machine because if it were functional I'd be cutting instead of playing in CAD.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

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File Type: jpg Aurora.215.jpg (94.9 KB, 784 views)
File Type: jpg Aurora.205.jpg (130.9 KB, 759 views)
File Type: jpg Aurora.213.jpg (461.5 KB, 764 views)
File Type: jpg Aurora.210.jpg (118.5 KB, 753 views)
File Type: jpg Aurora.206.jpg (169.9 KB, 744 views)
File Type: jpg Aurora.201.jpg (109.4 KB, 740 views)
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Old 15th August 2012, 07:47 AM   #356
sploo is offline sploo  United Kingdom
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Very nice indeed. Similar to the configuration that she-who-must-be-obeyed has allowed me to use to get the sub drivers I have into the living room. Not that I'm ever likely to get the time to build the things though...

Is that (internally) a split mid/treble and bass cabinet, or is it a single volume inside?
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Old 15th August 2012, 09:19 AM   #357
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Ah your doing it all wrong Gordon. It should be you stating the rules... who am I kidding, no use fighting thousands of years of natural evolution!

As you suspected the mid is divided.
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Old 15th August 2012, 04:16 PM   #358
gornir is offline gornir  Sweden
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Hi Shin,

Very impressive design and rendering.

I'm a bit curious how the tweeter measurements would look like with that small horn configuration and how the diffraction effect of it looks like.

Nice job!

Regards

/Göran
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Old 17th August 2012, 01:06 AM   #359
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Thanks Goran.

The small radius 'horn' on the tweeter in the renders can be considered cosmetic. The final version will have a wave guide but unfortunately until the CNC machine is working and I cut some test parts for measuring then its undecided. An asymmetrical horn similar to the loading Genelec uses in various monitors is a possibility too.

There's lots of variables to consider but my primary focus is the Apollo for now.

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File Type: jpg Aurora.233a.jpg (111.5 KB, 606 views)
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Old 17th August 2012, 03:02 PM   #360
gornir is offline gornir  Sweden
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Quote:
Originally Posted by ShinOBIWAN View Post
Thanks Goran.

The small radius 'horn' on the tweeter in the renders can be considered cosmetic. The final version will have a wave guide but unfortunately until the CNC machine is working and I cut some test parts for measuring then its undecided. An asymmetrical horn similar to the loading Genelec uses in various monitors is a possibility too.

There's lots of variables to consider but my primary focus is the Apollo for now.

Click the image to open in full size.
I would love to have one of your enclosure creations and design the passive cross-over in it.

I even think my wife wouldn't have any objections since the WAF factor is sky-high in your enclosure designs.

Regards

/Göran
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