New DIY Mid High (90deg) - AKA PM90

Max Warasila

Graduate
Feb 20, 2013
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Richmond, VA
Carl,

Congratulations on an awesome new tool!

I did the design with a single 1/4" straight flute end mill in mind way back in 2016. Be sure that you have either a stiff frame with powerful motors or that your spindle speed is pretty low. You can burn through bits pretty easily when cutting baltic birch if you're not careful.

As it turns out, I will again have access to a CNC router in the near future myself. Finally, I should be able to make flat packs for the first time in many years!

If you have any questions or want to compare notes, please let me know!
 
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Peter Morris

Senior
May 8, 2011
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Australia
You guys are amassing - with a bit of luck I will have time to pull a PM60 apart tomorrow and try the DCX464 with the 18 sound horn ... just to make sure.

If it does not fit I think the new Ciare PR 614 horn may be an option, it will not go quite as low as the 18sound but its performance is a little better from my initial tests.

http://oem.ciare.com/en/299/450/prodotti.php
 

Peter Morris

Senior
May 8, 2011
1,016
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Australia
OK I have tried the DCX 464 on the XT1464 ... it fitted but the driver was touching the B&C 12NDL75 (back of the DCX464 on the 12NDL75 frame and about 1mm clearance to the speaker terminals) ... so you will need a spacer under the horn 6-10mm. That means the HF950 will fit with the DCX464. I also tried the Ciare PR614 which will also fit with the DCX464.

DCX 464 in PM60.jpg
 
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Max Warasila

Graduate
Feb 20, 2013
1,164
51
48
Richmond, VA
Peter,

I suspect I have slightly more internal space in the drawings that I did than you do in your boxes. It would be interesting to know just how close we are to each other.

I can try and do a 3D model eventually to verify, but it may take a while.
 

Peter Morris

Senior
May 8, 2011
1,016
102
63
Australia
Peter,

I suspect I have slightly more internal space in the drawings that I did than you do in your boxes. It would be interesting to know just how close we are to each other.

I can try and do a 3D model eventually to verify, but it may take a while.
I think my boxes are exactly to plan. That picture is the position required for the XT1464 horn. The HF950 is not as deep so it will have more clearance as shown on your recent drawings.

FWIW the first prototype PM90 was a bit smaller and the DCX464 does not fit with either the HF950 of XT1464 horn.
 
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