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Multi-Way Conventional loudspeakers with crossovers

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Old 19th April 2013, 01:45 AM   #621
SirByrd is offline SirByrd  United States
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What was your feed-rate like where you were breaking cutters?
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Old 19th April 2013, 01:51 AM   #622
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Anything upward of 300mm/min was asking for trouble. Too slow and the cutter gummed up and broke. I found 250mm/min worked fine for me with a DOC of 0.075mm and total depth of 0.15.

The engraving bits are 10 degree and almost needle like. Very fragile.

A kind soul recommended a diamond tipped drag cutter as used in vinyl cutters for this sort of job. Much harder to break.
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Old 19th April 2013, 01:54 AM   #623
SirByrd is offline SirByrd  United States
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Wow, hope they weren't expensive. No manufacturer specs for feed rate? I'm a CNC noob, so I don't know if that's a thing or if it is totally dependent on the cut you are doing. Seems odd there would be a minimum feed rate.
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Old 19th April 2013, 02:04 AM   #624
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No not at all really. They were these:

5 x Carbide PCB Engraving CNC Bit Router 10 Deg 0.1mm | eBay

I bought a bunch of them knowing I'd probably break a few. Your feedrate is determined by lots of things including the machine, material, depth of cut/step over, finish quality and so on. You sometimes get generalised advice for common materials but really you'll have to play around until your getting results.
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Old 19th April 2013, 02:05 AM   #625
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I should be using one of these instead of the engraving bits:

SIGN VINYL DRAG KNIFE & ENGRAVING BIT CNC END MILL VACUUM TABLE VINYL CUTTER | eBay
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Old 19th April 2013, 02:06 AM   #626
SirByrd is offline SirByrd  United States
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Awesome, thanks.
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Old 19th April 2013, 06:08 PM   #627
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With the black lettering. These still need clear coat to finish them up.

Click the image to open in full size.

Daylight shots of the Apollo plates. You can see the fine brushed finish looks almost satin. Really pleased with these.

Click the image to open in full size.
Attached Images
File Type: jpg Rear Panel 02.jpg (203.2 KB, 1341 views)
File Type: jpg Apollo Rear Panel 04.jpg (145.3 KB, 1318 views)
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Last edited by ShinOBIWAN; 19th April 2013 at 06:10 PM.
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Old 19th April 2013, 06:38 PM   #628
badman is offline badman  United States
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Quote:
Originally Posted by ShinOBIWAN View Post
With the black lettering. These still need clear coat to finish them up.

Click the image to open in full size.

Daylight shots of the Apollo plates. You can see the fine brushed finish looks almost satin. Really pleased with these.

Click the image to open in full size.
Great looking plates. A couple suggestions-

1) You may wish to tweak the spacing to allow dual bananas. This would have the added benefit of grouping the HF/LF inputs together more closely than their vertical spacing, making the wiring more intuitive/foolproof.

2) I'm a big fan of the cardas patented single-knob binding posts for spades. You may want to consider these, they're a very elegant UI for input wiring on a loudspeaker.
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Old 22nd April 2013, 08:23 PM   #629
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Completed:

Click the image to open in full size.

Another alu plate for the hidden connections between cabinet sections. Finished in matt black:

Click the image to open in full size.
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Old 22nd April 2013, 11:25 PM   #630
_henry_ is offline _henry_  Australia
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shin, i cant see the pics on your last post
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