Printed 931 Volume Knob

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m40dotcom

Member (SA)
I'm not gonna be the last person to say it, but DAMN that is sick. Not sure you wanted to share that ability with all us as you're going to get a few hundred requests for various knob, switches and the like.

Now who on the board is a CAD head? We gotta have somebody? Last time I did 3D modeling it was in 3D Studio that ran in DOS. My uncle uses CAD for designed new Target floor plans, so you'd think a knob or two wouldn't be tough. I could ask around with him and others he works with about it.

Between someone with basic CAD skills and some time on their hands, and your 3D printer, I think you'll have a heck of a business of orders from everyone on the board. I'd bet that if all the members knew of this, you could get a list of 'orders' and probably crank out a couple dozen Lasonic knobs, some M70/M90 and Conion C100F knobs and the like. Instead of doing a ton of one offs, get all the orders from everyone and then do a run of them all at once. You just get to figure out a price that's worth your time, same for the CAD work person. I know I'd pay $7+ to get a missing switch, knob, or otherwise.

Now if you could get a printer that could do battery cover sized items, there's another 200 orders. :-)

Just my thoughts. Damn I wish I had one of those things. I'd be printing missing parts for Boxes, old Transformer toy missing pieces, etc etc etc.
 

=ml=

Member (SA)
=ml= said:
=ml= said:
hemiguy2006 said:
Man that is really kool that you could do that!!!!
I need to know more about this moulding or printing process.

Why not get the other style of knob and epoxy a d stem onto it.
I had to do this for my 975 and it worked out great.
Find any old d stem knob and cut the stem off of it, or in your case make your own.
Then take your standard 931 knob that are readily available at lasonicstore.com
http://www.lasonicstore.com/p-128-trc-931-knob.aspx
and shave all the ridges off the inside of the stem.
Epoxy the d stem in place at the back of the knob observing knob position before doing so.
also make sure the epoxy doesnt get into the center of the stem
Let it dry and cure fully then trim stem to fit the knob flush.
That's brilliant! :w00t: :yes:

I can print the stem and attach it to a mod'd spline knob as you describe, or I can design and print an adapter that converts a spline knob into a D-stem knob (dunno if this is possible, only one way to find out...).
Either way, as you pointed out, I can use the knobs from lasonic.com. :-)
w00t!
It looks like a printable adapter is possible. I've got an almost working prototype. Just a couple more iterations and it should be rockin'. :-)
Here's the latest:
l1060734.jpg

* Spline to D-Stem knob adapter

l1060731.jpg

* Spline knob on adapter

Because the length of the OEM spline stem knob is longer than the volume potentiometer's stem, the knob's stem must be reduced by ~5mm to accommodate. The pix DON'T show this, but that's the next step.
Fortunately, if I wreck the knob, I can grab another from Lasonic.com; don't want to wreck and erect the OEM volume potentiometer. :'-(

FWIW, here are the adapters chillin' with a gansta waitin' for their assignment:

l1060718.jpg


Go!

=ml=
 

=ml=

Member (SA)
:dj-party:
SUCCESS!!!

After 4 iterations, I've got a printable adapter that converts the lasonic.com spline knobs (Mk I & II) into D-stem ones (Mk III). :yes: :thumbsup: :thumbsup: :

I had to clip some of the spline collar to accommodate the adapter and make it the correct final height.
A little tricky, and a countersink might be easier and also work.

l1060760.jpg

931 volume knob adapter (top)

l1060759.jpg

931 volume knob adapter (bottom)

l1060755.jpg

931 volume knob with adapter boomin'

Go!

=ml=
 

=ml=

Member (SA)
For 3K you could make 3D models of every boombox and part in your collection. :-D

NextEngine

If it's good enough for Jay Leno, it's good enough for me!

Thinkin' of a master plan... :hmmm:

Go!

=ml=
 

Lasonic TRC-920

Moderator
=ml= said:
For 3K you could make 3D models of every boombox and part in your collection. :-D

NextEngine

If it's good enough for Jay Leno, it's good enough for me!

Thinkin' of a master plan... :hmmm:

Go!

=ml=

OK, here is a question....do you think you could make some thing a bit simpler like a battery door if you had a sample?
 

=ml=

Member (SA)
Lasonic TRC-920 said:
=ml= said:
For 3K you could make 3D models of every boombox and part in your collection. :-D

NextEngine

If it's good enough for Jay Leno, it's good enough for me!

Thinkin' of a master plan... :hmmm:

Go!

=ml=

OK, here is a question....do you think you could make some thing a bit simpler like a battery door if you had a sample?
If you're not Jay Leno, that's how you how you make 'er: two gray lobes and a caliper. :lol:
What do you have in mind? With a sample, I should be able to CAD one up, and depending on size, print it. :hmmm:

Go!

=ml=
 

=ml=

Member (SA)
hemiguy2006 said:
That turned out sweet!!!! :thumbsup:
Thanks! :-) I'll be selling them soon...
Or, if you want to be a beta-tester, have these, and will pay for shipping, PM me:

* Mk III 931
* Lasonic.com spline knob(s)

Go!

=ml=
 

Lasonic TRC-920

Moderator
=ml= said:
Lasonic TRC-920 said:
=ml= said:
For 3K you could make 3D models of every boombox and part in your collection. :-D

NextEngine

If it's good enough for Jay Leno, it's good enough for me!

Thinkin' of a master plan... :hmmm:

Go!

=ml=

OK, here is a question....do you think you could make some thing a bit simpler like a battery door if you had a sample?
If you're not Jay Leno, that's how you how you make 'er: two gray lobes and a caliper. :lol:
What do you have in mind? With a sample, I should be able to CAD one up, and depending on size, print it. :hmmm:

Go!

=ml=

Well, I need a Lasonic TRC-920 battery door. I have one, but need a second one. The locking tabs would be the tough part, but even if they were made semi rough (squared and not round) they could be filed into shape.
 

=ml=

Member (SA)
Lasonic TRC-920 said:
=ml= said:
Lasonic TRC-920 said:
OK, here is a question....do you think you could make some thing a bit simpler like a battery door if you had a sample?
If you're not Jay Leno, that's how you how you make 'er: two gray lobes and a caliper. :lol:
What do you have in mind? With a sample, I should be able to CAD one up, and depending on size, print it. :hmmm:

Go!

=ml=

Well, I need a Lasonic TRC-920 battery door. I have one, but need a second one. The locking tabs would be the tough part, but even if they were made semi rough (squared and not round) they could be filed into shape.
I almost bought a local parts box last month (too expensive); if I had, I'd already have the battery cover! :-)
Send it over; I'll give it shot. :yes:

I'll PM you my address.

Go!

=ml=
 

oldskool69

Moderator
Staff member
Fatdog said:
OMG! I just now saw this thread. I'm simply amazed, Miles. :-) It looks like I need to learn CAD now. :-D


CAD isn't the problem...it's COST!!! :lol:


Very nice. I have a feeling though that one day these machines will be as common as Wal-Mart twenty buck printers... :-D

Meanwhile back at the ranch.... :-/


Miles! Very nice work though! Now you need to make those damn gears that constantly break on the function/band selector switches! :lol:
 
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