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Old 26th August 2012, 01:57 AM   #71
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Magnasanti,
I will have to look through my papers and see if I can find that article. On your comment about post #1 what are you saying about it changing. Isn't that a static post?

Steven
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Old 26th August 2012, 02:05 AM   #72
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Quote:
Originally Posted by Kindhornman View Post
Magnasanti,
I will have to look through my papers and see if I can find that article. On your comment about post #1 what are you saying about it changing. Isn't that a static post?

Steven
I go back and edit it with new found information. Only the post with pictures i cant seem to edit.
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Old 8th October 2012, 07:24 AM   #73
areczek is offline areczek  Poland
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Hint.
Melon has no bearing! Upper end of the fins has not rolled works.Lamela episode that is pasted in the hard-boiled and not rolled part is coated with an adhesive ELASTOSIL E43 Wacker.
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Old 10th October 2012, 07:54 AM   #74
areczek is offline areczek  Poland
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Apologize for the error.Glue is ELASTOSIL E41 wacker.
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Old 20th November 2012, 04:48 PM   #75
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Originally Posted by Magnasanti View Post
The next steps that will be coming in the next week are. Making a mold out of carbon fiber using a 110mm pipe that will give me the bending radius of 55mm, And cutting the parts labeled: inner-ring, outer-ring, and outer-support-rods.
Were you able to make the carbon fiber mold? Is the mold to create the support rods or the lamellas? In some of the pictures the lamellas look like carbon fiber or aluminum, and the support rods look metallic.

I just made a silicone mold of a speaker cone and created a cone with fiberglass and epoxy resin. What weight carbon fiber are you using?

Very interesting project! I'm trying to create a unique speaker from scratch myself.
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Old 20th November 2012, 08:39 PM   #76
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Apologies, I just read a post that said you have made carbon fiber lamellas. How have these turned out?

I also see you are sourcing your voice coils from Econowind. What type of voice coil did you go with? I am also trying to locate a vendor instead of ripping up speakers solely for their coils... haha
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Old 21st November 2012, 08:27 AM   #77
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Well I would love to look/learn about your unorthodox speaker design. As you Know I started a new thread with the same name take a look its a no-nonsense thread and I have new images of my project. I have yet to make the carbon fiber lamellas, Because I was busy making the design and machining the metal parts. The diaphragm or lamellas of the speaker have a 55mm bending radius which the 110mm tube gave me as far as the negative mold. I have actually gone ahead and made a mold of the tube from 8 layers of carbon fiber which I will post pictures of later, once the metal machined parts are posted, so that everything can be in sequence. I didn't go with Econowind they were asking too much. What I plan to do is just use hot melt glue to attache the lamellas to the voice-coil when testing. Soon after I Finnish with the metal parts the fun will begin!
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Old 21st November 2012, 08:31 AM   #78
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Just re-read your post and will answer the rest of the questions. The need for econowind was merely for extra voice-coils so that I may test different variables. The use of hot melt glue eliminates that. I purchased a driver for both the voice-coil and motor which fit the bill VERY nicely. I would not use fiberglass due to the weight and stiffness. I am using samurai carbon fiber which is the absolute best available with a weight of 61g/m2. There are a host of factors which influence the type of fabric used Samurai fabric is the lightest stiffest has no spaces in the weave and is flat-towed which mean less crimp. The type of resin also influences the composite greatly. I myself am using MGS resin which again is the absolute best available as far as room cured resins go. Finally the cure system used influences the composite as far as weight and stiffness. I will be using a vac bagging system which will be cured in the oven.

Last edited by Magnasanti; 21st November 2012 at 08:38 AM.
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