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Multi-Way Conventional loudspeakers with crossovers

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Old 1st August 2008, 03:06 AM   #91
gedlee is offline gedlee  United States
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I see you understand the problem completely. There is no simple solution - I've thought a lot about this. If what Markus is showing is correct then something else went wrong, but the top is never going to mate at the corners perfectly in any reasonable cost kit. And someone trying to do this themselves will only run into the same problems. To me, the best solution is to ship the parts just as they are and then the customer simply sands this piece to fit. Thats what I do and it works fine. I wouldn't do it by hand however, but thats the customers choice.

I don't think that there is any problem front to back. What Markus is showing would have the problem at the bottom.

It looks like he glued the parts together already or I could cut new sides, if thats where the problem is. Because I suspect that its the inner baffle board that is a bit too long. I have seen this before. But then you just sand that down a bit.
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Old 1st August 2008, 03:15 AM   #92
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The discussion goes around in circles. The error in your woodwork doesn't go away from pushing the parts from one side to the other. Furthermore, to acknowledge that you haven't seen this before suggests that you didn't check the panels before shipping them. You really should do yourself a favor and stop blaming me or a third person ("I am surprised that there is this much error" - YOU did the cutting and glueing!). I'm just asking you to take your responsibility as a vendor. How would you react if coils from Madisound ship with wrong values: "Hey, just wind them up 'til they have the right values - What you don't have a multimeter?"

Markus
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Old 1st August 2008, 03:17 AM   #93
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Markus,

IF the cabinets have already been glued together then I would fill in the gap with a low viscosity epoxy resin to fill up the gap. Then use some bondo and sandpaper to finish it up. THe epoxy will be strong enough to make a good structurally solid repair.
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Old 1st August 2008, 04:00 AM   #94
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Quote:
Had the top piece been 1" then this would not happen, but 1" MDF is not readily accesable to me.
...and you have the Greater Detroit Metropolitan area to source from...

The vast majority here want this effort to succeed. There are also many ways to make the casework better. One key would be to place it into the hands of someone who has demonstrated they know how to do it. Along with this would be anticipating how to make 100 of them in a batch...or more.


Do the plans for casework indicate or encourage the installation of additional bracing? A 3/4" baffle will raise some eyebrows.
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Old 1st August 2008, 04:10 AM   #95
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Originally posted by salas
They claim they are US made,
PE makes no such claim and the dark blue 2" tall 'Made in China' label printed on two sides of the shipping boxes tells the tale.
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Old 1st August 2008, 05:10 AM   #96
agent.5 is offline agent.5  United States
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Originally posted by Hezz
Having this done CNC would be nice but the start up cost for this would be 15,000-20,000 bucks

This is complete crap. Maybe if you are billing $1000 an hour to do basic autocad. You forget that you are mostly cutting straight lines. You can buy a CNC machine for 3K-5K, and DIY for less than 2K

go here.

http://www.cnczone.com/forums/index.php



the diy cnc machine forum.
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Old 1st August 2008, 05:43 AM   #97
Salas is online now Salas  Greece
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Quote:
Originally posted by cixelsid


PE makes no such claim and the dark blue 2" tall 'Made in China' label printed on two sides of the shipping boxes tells the tale.

I must have read that on their site: ''All engineering from cabinet to crossover was done in the U.S.A., ensuring that Dayton Audio speakers will faithfully reproduce the music that you know, with tonal qualities that you prefer.'' My mistake.
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Old 1st August 2008, 06:06 AM   #98
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Originally posted by agent.5



This is complete crap. Maybe if you are billing $1000 an hour to do basic autocad. You forget that you are mostly cutting straight lines. You can buy a CNC machine for 3K-5K, and DIY for less than 2K

go here.

http://www.cnczone.com/forums/index.php



the diy cnc machine forum.
I'm afraid your lack of experience leads you to miscalculate what is required in terms of machine type needed. These small machines do not have the capacity to do production milling. Sure you could set one up to do some small projects. You can't do the straight line milling for all operations unless you use a custom tool. Which is another expense both for design and engineering. To be effective you have to be able to have all of the parts laid out on a vacuum table and the program set up so it can cut out a whole 4 x 8 sheet out at once. The router or milling head needs to be able to tool change at least two or three tools automatically. Or the process needs to be attended by an operator to do it manually. These kinds of CNC router tables are not 3-5k but more like 10-30k or more.

The small CNC machines do not usually have enough bed clearance for these kinds of parts. Even a standard EZtrack CNC mill would not have quite enough movement to do these panels. THese panels would probably be just a few inches too big for that machine which starts at around 8-10k for CNC. As for small CNC table routers I'm sure that there are some hobby type or DIY ones that would work for the individual panels if they were cut to approximate size first. But then you are adding the CNC on top of the manual work.

You might be able to find some guy who is a hobbiest has the right machine that will do the work for you cheap in terms of programming and set up. Or a custom cabinet maker who has a CNC router table that is low on work might be able to do it for a lot less than a larger outfit would. But to make it cost effective you still have to do a certain amount of volume or pay them enough to make it worth their while. If you have access to a shop full of big machine tools that aren't used for production purposes sure you could do it cheap. But this is an unlikely scenerio for most people.
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Old 1st August 2008, 06:12 AM   #99
agent.5 is offline agent.5  United States
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Originally posted by Hezz
[B]

I'm afraid your lack of experience leads you to miscalculate what is required in terms of machine type needed.

I guess that I lack the ignorance that the billing rates that you deserved.
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Old 1st August 2008, 06:24 AM   #100
Salas is online now Salas  Greece
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Originally posted by gedlee
But there are things about doing business in the US that may be different than where you live.
Same stuff here too. China sourcing, box moving, marking up like crazy, and anything decent is baptized high end with an according price tag and a specialized importer.
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