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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Subwoofer Forum => Topic started by: Thomas May on June 07, 2011, 10:34:28 pm

Title: CNC Labhorn
Post by: Thomas May on June 07, 2011, 10:34:28 pm
I have assembled my first Labhorn after countless hours of designing a proper cad model of this spectacular beast. I cut and routed most of the parts with a ShopBot. My design replaced the biscuit joints with a 5mm pocket on the side panels as well as the inter module, this effectively became a jig to true everything up. Also this pocket combined with tap plastics epoxy made for a sure air tight seal.

Here are some pictures of the build.

https://picasaweb.google.com/thomas.may/Labhorn# (https://picasaweb.google.com/thomas.may/Labhorn#)

I would not mind to share my cad drawings with the community that developed this amazing beast. just ask...

TM
Title: Re: CNC Labhorn
Post by: Lance Qu on June 08, 2011, 01:47:07 am
I have assembled my first Labhorn after countless hours of designing a proper cad model of this spectacular beast. I cut and routed most of the parts with a ShopBot. My design replaced the biscuit joints with a 5mm pocket on the side panels as well as the inter module, this effectively became a jig to true everything up. Also this pocket combined with tap plastics epoxy made for a sure air tight seal.

Here are some pictures of the build.

https://picasaweb.google.com/thomas.may/Labhorn# (https://picasaweb.google.com/thomas.may/Labhorn#)

I would not mind to share my cad drawings with the community that developed this amazing beast. just ask...

TM


Hey TM, I have a question, what size of the transduer will be right for this LABhorn , 15inch ??
Title: Re: CNC Labhorn
Post by: Tim McCulloch on June 09, 2011, 11:02:28 am

Hey TM, I have a question, what size of the transduer will be right for this LABhorn , 15inch ??

The LABHorn is designed to use only 1 model of speaker, and it's a 12".  You can't just dump any speaker into a horn, willy-nilly. 
Title: Re: CNC Labhorn
Post by: Thomas May on June 09, 2011, 03:03:20 pm

Hey TM, I have a question, what size of the transduer will be right for this LABhorn , 15inch ??

The cabinet has always been intended for a lab12 speaker, that is what I put in mine.
Title: Re: CNC Labhorn
Post by: Art Welter on June 09, 2011, 03:04:06 pm

Hey TM, I have a question, what size of the transduer will be right for this LABhorn , 15inch ??

The LABHorn is designed to use only 1 model of speaker, and it's a 12".  You can't just dump any speaker into a horn, willy-nilly.
You can "dump" most any speaker into any cabinet using an adapter plate.
The results may or may not be better than using the speaker the cabinet was designed for.
The Lab 12 was quite different in concept from the usual "horn load" speaker when it was designed, but there are now many cones with similar TS parameters that will work well in the LabSub.
Title: CNC Labhorn
Post by: Thomas May on June 09, 2011, 09:40:38 pm
Anyway. This post was not about the speaker that went in to it but rather about the way the cabinet got build. I have several very detailed sketchup models of the LABhorn that I used to create some cnc cuts on the plywood. I am wondering if anyone is interested.
attached is a simple render of what I worked on.
Title: Re: CNC Labhorn
Post by: Thomas May on June 10, 2011, 03:49:30 pm
I have added a link with all the files I used of this project.

https://docs.google.com/leaf?id=0B1Bn7qgyH1QRNDhhNDMyYjktODNhMS00NmFmLWFjZGEtODA0NTNkZjNmZThm&hl=en_US (https://docs.google.com/leaf?id=0B1Bn7qgyH1QRNDhhNDMyYjktODNhMS00NmFmLWFjZGEtODA0NTNkZjNmZThm&hl=en_US)

The files in the "ready for vcut" folder are the ones I used for the shopbot.
Title: Re: CNC Labhorn
Post by: Pascal.Pincosy on June 10, 2011, 09:58:34 pm
I have added a link with all the files I used of this project.

https://docs.google.com/leaf?id=0B1Bn7qgyH1QRNDhhNDMyYjktODNhMS00NmFmLWFjZGEtODA0NTNkZjNmZThm&hl=en_US (https://docs.google.com/leaf?id=0B1Bn7qgyH1QRNDhhNDMyYjktODNhMS00NmFmLWFjZGEtODA0NTNkZjNmZThm&hl=en_US)

The files in the "ready for vcut" folder are the ones I used for the shopbot.
You rock Thomas! Great contribution!!!
Title: Re: CNC Labhorn
Post by: Albert Thomas on June 11, 2011, 05:00:50 pm
I have assembled my first Labhorn after countless hours of designing a proper cad model of this spectacular beast. I cut and routed most of the parts with a ShopBot. My design replaced the biscuit joints with a 5mm pocket on the side panels as well as the inter module, this effectively became a jig to true everything up. Also this pocket combined with tap plastics epoxy made for a sure air tight seal.

Here are some pictures of the build.

https://picasaweb.google.com/thomas.may/Labhorn# (https://picasaweb.google.com/thomas.may/Labhorn#)

I would not mind to share my cad drawings with the community that developed this amazing beast. just ask...

TM

Very nice TM!  The ShopBot is cool! I wish I could justify the outlay, although the labor time saved makes the equation look a lot more favorable. Is speaker building it's primary mission? 
Title: CNC Labhorn
Post by: Thomas May on June 12, 2011, 06:38:52 am
Your welcome. I will work on making the flange parts into a 3d part so the shop bot cuts the angles perfectly. I will run them soon to give feedback. as for now I have it all the parts for 1 labhorn laid out to fit on 3 sheets of 4X8 plywood. I figure that the shop bot cuts all the parts in around 5 hours if one is a good operator and all the files are correctly setup. This does not include the bevel cuts, these are all done on a table saw. but it does create a smooth very true side for the parts that fit in the 5mm pocket the sides have.

It might not be as fast as doing it all by hand but it is very precise,  and it has extra reinforcement and sealing is built into the design. epoxy and a few clamp ensure a perfect seal.

take a look at the sketchup files. they are very clean.
Title: Re: CNC Labhorn
Post by: Jon Geissinger on June 14, 2011, 05:13:36 pm
TOTALLY SMOKIN'!  Love it!  How much to make a flat-pak (all pieces cut, not other parts, unassembled)?
Title: Re: CNC Labhorn
Post by: Thomas May on June 14, 2011, 05:37:21 pm
TOTALLY SMOKIN'!  Love it!  How much to make a flat-pak (all pieces cut, not other parts, unassembled)?
I guess it depends. I would have to calculate my hours of work and what material would be used. I personally used 18mm shop birch ($35 a sheet) rather than the way more expensive baltic birch (around $120) if it can even be found.

Do you want me to give you a figure on a flat pack? for how many LABs?
Title: Re: CNC Labhorn
Post by: Tim Weaver on June 14, 2011, 07:48:45 pm
I guess it depends. I would have to calculate my hours of work and what material would be used. I personally used 18mm shop birch ($35 a sheet) rather than the way more expensive baltic birch (around $120) if it can even be found.

Do you want me to give you a figure on a flat pack? for how many LABs?

Might want to be careful with this line of thinking. The LAB horn design is not one which you can profit from. It is donated to the DIY community, but is owned I believe by Tom Danley.

Other than that, you did a fine job here. I'm curious, how did you turn the sketchup files into something that the shopbot can use? I have access to a shopbot, but no practical knowledge of how to design for it. Are there any how-to's that you might recommend?
Title: Re: CNC Labhorn
Post by: Thomas May on June 15, 2011, 01:30:21 am
Might want to be careful with this line of thinking. The LAB horn design is not one which you can profit from. It is donated to the DIY community, but is owned I believe by Tom Danley.

Other than that, you did a fine job here. I'm curious, how did you turn the sketchup files into something that the shopbot can use? I have access to a shopbot, but no practical knowledge of how to design for it. Are there any how-to's that you might recommend?

I understand that one can not profit from the LABhorn. I was not planing on commercializing but presented with the proposition given by Jon Geissinger I briefly pondered with the idea of helping a fellow DIYer.

As for using the sketchup design on the shopbot I laid all of the panels on a 4x8 rectangle, the size of a piece of plywood and the max work size the shopbot can work on, and I shuffled them around to make it fit the best. once this was done I exported a 2D top view of the 3 4x8 sheets which I imported independently to the CAD to CAM software I have access to, V Cut Pro, where I selected the lines that were cuts and the ones that were pockets. I later saved the tool paths specifically for the shopbot. All these files are in the folder I have made public.

Any questions I would be glad to answer.
Title: Re: CNC Labhorn
Post by: Tim Weaver on June 15, 2011, 02:17:55 pm
Now that you described it, it seems so simple! I was playing with sketchup and just sitting there ataring at it wondering how to turn a 3d model into a tool path! LOL I never thought of doing the top-down view in 2d.

Thanks for the info. I've got some road cases and some subs that I need to start knocking out. Lucky for me, the shopbot I have access to is a 5x10 with a vacuum hold down, so I can use 5x5 sheets on it.

I'm giving some hard thought to making labsubs, even though I have no way to transport them right now. It's still tempting!
Title: Re: CNC Labhorn
Post by: Thomas May on June 21, 2011, 12:02:49 am
Now that you described it, it seems so simple! I was playing with sketchup and just sitting there ataring at it wondering how to turn a 3d model into a tool path! LOL I never thought of doing the top-down view in 2d.

Thanks for the info. I've got some road cases and some subs that I need to start knocking out. Lucky for me, the shopbot I have access to is a 5x10 with a vacuum hold down, so I can use 5x5 sheets on it.

I'm giving some hard thought to making labsubs, even though I have no way to transport them right now. It's still tempting!

good luck with your projects, if any help is needed just let me know. Currently I am sitting in front of the shopbot looking at the parts to my second labhorn get cut.
Title: Re: CNC Labhorn
Post by: Jon Geissinger on July 04, 2011, 10:01:16 am
good luck with your projects, if any help is needed just let me know. Currently I am sitting in front of the shopbot looking at the parts to my second labhorn get cut.

I'm not out of the running!  Seems back when I was going to make cabinets is when the market when in the trash can!  I'm still dreaming of making more cabinets (for myself and other people), and not as a business (not without permission from Danley).  Flat packs really isn't a business, your are providing the raw material, not a functional 'unit'; but then again, not without permission (over 6 I believe it says).
I'm going to be getting my hands on a old tape library that I intend on converting to a CNC rig, should take a half sheet of ply without a problem.
I'm on the east coast (PA).  We'll see what happens.
I want to lighten these units without loosing structural integrity.  Might do that with more bracing and fiberglass?  I don't want to color the sound with the cabinet.
Jon G
PS.  If Mr. Danley is reading this, please contact me so that I can stay out of trouble!  Do you want a royalty or what?  Thanks in advance!
Title: Re: CNC Labhorn
Post by: Gregory Fenn on August 12, 2011, 08:13:10 am
Anyway. This post was not about the speaker that went in to it but rather about the way the cabinet got build. I have several very detailed sketchup models of the LABhorn that I used to create some cnc cuts on the plywood. I am wondering if anyone is interested.
attached is a simple render of what I worked on.
Nice Work!
Title: Re: CNC Labhorn
Post by: Senthil Seveelavanan on December 19, 2011, 07:39:40 am
What version of labhorn is this? What plans were used to make the design files? v1? v2? etc

How does it sound? Did you make any frequency response measurements?
Title: Re: CNC Labhorn
Post by: Thad Kraus on November 10, 2013, 01:45:05 pm
Did you have issue with making the grooves at exactly 18mm?
Title: Zombies
Post by: Mac Kerr on November 10, 2013, 02:13:39 pm
Did you have issue with making the grooves at exactly 18mm?

This thread is 2 years old, and the OP has not been back in over a year.

Mac