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Lola T-70 Mk III

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  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Monday, March 9, 2020 3:55 PM
As satisfied I was at the time, the more I looked the more I thought I could do better…  So more time on the mill and now I think I have what I want.  These cross-drilled holes scale out to ¼ inch in diameter.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Sunday, March 8, 2020 4:52 PM
So after way too much time and effort without acceptable results, I went back to my original plan to make the rotors before I got the 3D printer…  Good old machining.
First I milled in the rectangular vent holes around the perimeter.
Then I cross-drilled 60 holes in each side.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Sunday, March 8, 2020 4:21 PM
I designed and then grew the rotors several times over the course of a few months.  The detail I want is just not something my printer can do on both sides.  (One side is great.)  I redesigned them adding more material so I could post-machine  after growing them, but the material is too brittle when cured, and too soft and pliable before fully curing.  I was able to make them look really good after machining, but every one of them had micro fractures (or worse) that would show up under paint.
The good side of them:
The rough side of them before machining:

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    January 2015
Posted by mustang1989 on Thursday, February 6, 2020 7:59 AM

Always good to pop in on this one and see the work going on. Lookin' good so far.

Being really stupid is the new smart!! 

    Joe

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Wednesday, February 5, 2020 6:07 PM

Thanks Dave!

 

I was going to have to adjust the rotor hubs (or make shims) so I decided to mill a new one out of resin stock instead of editing the 3D file and growing a replacement.  This was quicker too.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    January 2020
  • From: Florida USA
Posted by Gooch01 on Saturday, February 1, 2020 8:36 PM

Excellent work your cad work is spot on next-level stuff.  

Regards 

Dave 

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Saturday, February 1, 2020 7:17 PM

Thanks!

 

The half-shafts are done for now.  The yokes are cast resin (dyed black) copies of 3D parts.
The shafts are brass acid treated for the dark finish. 
Each U-joint has four bearings/caps (with E clips) and they work.  The half-shafts telescope too.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    January 2004
  • From: CA Gold Country foothills.
Posted by mishalah on Saturday, February 1, 2020 7:40 AM
Those valve covers are outstanding!

"Help me....I've fallen and I can't get up."...my models are crushing me. my pics: https://public.fotki.com/dallas916/

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Sunday, January 26, 2020 2:00 PM
Then I cast the side that contains the face of the wheel in RTV so that the seams are all on the inside of the wheel and quite minimal at that.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Thursday, January 23, 2020 9:46 AM
I machined tool to make controlling the parting line in the wheel molds easier. 
It locks into the back of the wheel center like the rear piece of the rims.
Clay is used to seal one side.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Wednesday, January 22, 2020 11:56 AM
I redesigned the rear wheel to be three pieces like the fronts and restyled the back of the spokes to match too.  This is the raw 3D grown/printed master before machining.
 
And after…
(The black marks are index points for making the mold.)

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Tuesday, January 21, 2020 10:57 AM

Thanks Dave.

 

These are the resin versions of the valve covers.

With an internal mounting system to hold and align the magnets to the ones in the heads.

 

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    January 2020
  • From: Florida USA
Posted by Gooch01 on Saturday, January 18, 2020 7:21 PM

I really like what your doing keep up the great work 

Regards 

Dave 

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Saturday, January 18, 2020 3:08 PM
I had a bit of a setback when it turned out that the platinum based RTV I use primarily would not cure against the U.V. cured 3D resin from the printer.  Even after using the sealing materials that worked as barriers in the past, the molds were not curing and worse than the time loss was it making gooey messes on my patterns. That took many hours over several days to clean up.
I invested in some tin based RTV and that seems to be the right stuff for this resin. 
Here are the calipers and one pair of pads I'll use on the car.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    January 2015
Posted by mustang1989 on Tuesday, January 7, 2020 4:29 PM

All's I've gotta say about this is.....

Being really stupid is the new smart!! 

    Joe

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Tuesday, January 7, 2020 11:01 AM
I grew a new alternator fan but the inside filled in, a common issue with this printer.
So I machined it out.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Friday, January 3, 2020 6:37 PM
The U.V. resin is very hard and brittle.  That part did not survive the machining process.
I started growing a beefier part and realized I could probably machine one from scratch faster.
I was correct, made this from scratch and the printer is still running.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Friday, January 3, 2020 3:56 PM
This is the rear section of the new rim design; it still needs to be final machined.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Friday, January 3, 2020 2:29 PM
Once in primer I still was not satisfied so I re-engineered the wheel to be three pieces instead of two.
This is the new spoke piece as it was grown.
And then machined.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Thursday, January 2, 2020 12:07 PM
The valve cover pattern is done and ready to have a mold made from it.
Same for the calipers.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Tuesday, December 31, 2019 5:28 PM
I wasn't satisfied with the last wheel I grew so I redesigned a few parts of it and made a new one.  The front came out fine; it was the back side I didn't like.
It like the previous one required a good bit of post-machine work (it was designed to have that work done) and I think it is an improvement.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Tuesday, December 31, 2019 5:12 PM
This is the inside of the valve cover master.  While I designed it with mounting features they filled in when the part was grown.  So I milled those features in by hand.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Sunday, December 29, 2019 6:29 PM

I'm using a Photon S.  

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    November 2019
Posted by mrgts1 on Sunday, December 29, 2019 10:15 AM

Mark, what printer did you purchase out of curiosity? I bought a Epax myself a few months ago to print all my parts out for the pro mod.

Paul

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Saturday, December 28, 2019 6:02 PM
I grew the masters of the Wilwood calipers I designed but was not able to get the outsides to look their best without sacrificing the details on the insides where the pads mount.
I machined and hand finished the insides to accept the pads and to fit together.
Fronts on top, rears on the bottom.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Friday, December 27, 2019 3:24 PM
Brake pad masters ready to have a mold made.  My 3D files grown by Fraxional.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Thursday, December 26, 2019 9:02 PM
I made some design changes to the wheel centers and rather than wait for Fraxional to grow new ones for me I took a shot at it by doing a front first.  (My impatience; they have good turn-around times).  I can't get the quality that Fraxional does (at least at this time…) and so I had to spend a couple hours fine tuning it on the mill.  Not sure if this will be the final master or if I will go back to my original plan of having Fraxional grow these wheel parts.  Primer will help determine that path…
Doesn't look too bad with my aluminum outer rim on it though.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Thursday, December 26, 2019 5:35 PM
The alternator parts were grown by Fraxional, but I neglected to send one of the part files so the clear piece is the inner/center section that I grew rather than wait. 

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

  • Member since
    July 2005
  • From: Surf City, So Cal
Posted by Scale-Master on Tuesday, December 24, 2019 11:49 AM
I took a shot at growing some parts myself.  Here's a valve cover.  It's hard to capture the details in the clear resin in photos.  I plan to cast copies in opaque urethane resin.

Build what you want and build it for yourself, the rest will follow... Mark D. Jones

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