Date   
Narrow shank lower shelf couplers

Todd Fisher
 

Does anyone happen to have maybe 4 or 5 pairs of narrow shank lower shelfs they could spare? If not it's not the end of the world but I'd like to try using them before attempting to use a shorter shank coupler for my needs. 

Re: n scale size couplers

Dan Ward
 

that was done over 6 years ago and has since stopped the project out right, hence the reason why im asking here

Re: n scale size couplers

George
 

Sounds like somebody has taken it on. 


On May 22, 2019, at 11:46 PM, Dan Ward <thunderrails@...> wrote:

i was watching a short video of someone who has successfully produced a working coupler for n scale, he didnt use the files that were kindly given to the community by Frank, but did his own castings like Frank did with a lot of hope in the first pair. would someone like to try to take this on and see if it would be possible?

n scale size couplers

Dan Ward
 

i was watching a short video of someone who has successfully produced a working coupler for n scale, he didnt use the files that were kindly given to the community by Frank, but did his own castings like Frank did with a lot of hope in the first pair. would someone like to try to take this on and see if it would be possible?

Need steam coupler pocket

Dave Yingst
 

I am in need of either the metal or plastic steam locomotive coupler pockets. If anyone has a spare they are willing to part with, please contact me off list.
Thanks
Dave Yingst
Corning CA
yingstco@...

Re: Frank

Mike Conder
 

Bit I misread this message.  "Resent" vs. "re-sent," I thought there was another flame war starting!  😆

Mike Conder

Re: Frank

Todd Fisher
 

I think email is having issues on both ends lol I'm just trying to get a spare lower shelf since I've got one that doesn't have a pair


On Sun, May 5, 2019, 3:20 PM <rpayne101@...> wrote:
Frank,

I received a message from the group or Todd Fisher, saying you set a message but didn’t see anything as well.

Unless it was about printing couplers for casting/mold making.

Best Regards,
Rick


On May 5, 2019, at 7:05 AM, Todd Fisher <tftrainman1@...> wrote:

Hi Frank I resent it. It was in regards to my order of ball bearings and springs. I'm needing one extra lower shelf coupler to pair with one i have a extra of. 

On Sat, May 4, 2019, 9:15 PM Frank Sergent <fsergent@...> wrote:
Hi Todd, I see nothing from you. Please make sure you sent it to info@...
 
Sent: Thursday, May 02, 2019 1:52 PM
Subject: [Sergent Engineering] Frank
 
Frank sent you an email when you get a chance please check for me. Thank you.

Re: Frank

Rick Payne
 

Frank,

I received a message from the group or Todd Fisher, saying you set a message but didn’t see anything as well.

Unless it was about printing couplers for casting/mold making.

Best Regards,
Rick


On May 5, 2019, at 7:05 AM, Todd Fisher <tftrainman1@...> wrote:

Hi Frank I resent it. It was in regards to my order of ball bearings and springs. I'm needing one extra lower shelf coupler to pair with one i have a extra of. 

On Sat, May 4, 2019, 9:15 PM Frank Sergent <fsergent@...> wrote:
Hi Todd, I see nothing from you. Please make sure you sent it to info@...
 
Sent: Thursday, May 02, 2019 1:52 PM
Subject: [Sergent Engineering] Frank
 
Frank sent you an email when you get a chance please check for me. Thank you.

Re: Frank

Todd Fisher
 

Hi Frank I resent it. It was in regards to my order of ball bearings and springs. I'm needing one extra lower shelf coupler to pair with one i have a extra of. 


On Sat, May 4, 2019, 9:15 PM Frank Sergent <fsergent@...> wrote:
Hi Todd, I see nothing from you. Please make sure you sent it to info@...
 
Sent: Thursday, May 02, 2019 1:52 PM
Subject: [Sergent Engineering] Frank
 
Frank sent you an email when you get a chance please check for me. Thank you.

Re: Frank

Frank Sergent
 

Hi Todd, I see nothing from you. Please make sure you sent it to info@...
 

Sent: Thursday, May 02, 2019 1:52 PM
Subject: [Sergent Engineering] Frank
 
Frank sent you an email when you get a chance please check for me. Thank you.

Frank

Todd Fisher
 

Frank sent you an email when you get a chance please check for me. Thank you. 

Re: (topic was Frank) New topic - progress is being made

Frank Sergent
 

Hi Tim and all,
 
I’m very happy to see everything going on here.
 
I’m not surprised the prints for the Sharon coupler did not come out well. Those files are what was used for the die cast tooling and I never tried to 3D print them. (You can still buy die cast RN87 couplers from me.) The Sharon couplers have very thin walls and are just plain tiny. Even die castings is challenge for those couplers.
 
I’m a little surprised your prints for the ERFTop_DLP_40X30 didn’t come out better. This file is for a mostly standard type E top with a shank that worked with the RailFlyer locos. I successfully printed lots of these on my EnvisionTec Perfactory Micro before it died. The Perfactory printer is based on a modified 1024X768 DLP projector focused to a 40X30mm build area. That gives it an XY resolution of 39 microns which is not too far off from your Photon printer. If you increased exposure time, you might do better. Using a high resolution resin would probably help too (can’t remember if Photon works with 3rd party resins or not). The only resin I ever used for investment cast items was PIC100 from EnvisionTec. PIC100 makes parts that are slightly flexible – not brittle at all, but not strong enough to be useful for a coupler. It’s burns out clean for investment casting and that’s what it’s intended for and that’s what I used it for. It’s crazy expensive and theoretically only available to people that have purchased EnvisionTec printers. I suspect you could order a bottle off the Geisswein website and no questions would be asked, but be prepared to pay $429 for that little experiment and you would still have to investment cast to get a usable coupler. There are lots of 3rd party resin suppliers and you could probably get something strong enough and not brittle from one of those guys that you could use without going to the trouble of investment casting. Just google 3d printer resin. I have to believe there is no reason an LCD based printer like the Photon couldn’t do this job, but I have never seen success there. I did not have success with my Duplicator 7 printer, but I never got prints anywhere near as good as you did from your Photon printer. I did see much success with my Perfactory Micro and prior to purchasing the Perfactory Micro, I proved I could do it with DLP projector based homebuilt printer that I put together (sadly, I scrapped that printer after I purchased Perfactory).
 
The Form II printer that Tom used for the S scale parts seems to have done very well with the larger S scale couplers. In my experience the Form II printer always does better than its specifications say it should. It uses a gyro positioned laser which gives it near zero XY resolution. Its a little slow, but the detail is very crisp despite the laser dot size that seems big compared to XY resolution quoted for other printers. Investment castable resin is available for the Form II and it can handle 3rd party resins if you want to experiment.
 
I posted some pictures in the iogroups photos section that show part of what is involved in the investment casting process. No one wants to go there unless you just have to.
 
Frank 
 
 
 

Sent: Wednesday, May 01, 2019 10:11 PM
Subject: Re: [Sergent Engineering] (topic was Frank) New topic - progress is being made
 
The parts in my photo (above) are;
    ERFTop_DLP_40X30
Assembled the next three parts, plus a ball, make up an RN87 (HO Scale)
    RNTop
    RKnuc
    RBot
The printed parts are basically useless: they do not even begin to fit together, and as such cannot be used to assemble into a working coupler.
Tim

Re: (topic was Frank) New topic - progress is being made

Timothy Cann
 

The parts in my photo (above) are;
    ERFTop_DLP_40X30
Assembled the next three parts, plus a ball, make up an RN87 (HO Scale)
    RNTop
    RKnuc
    RBot
The printed parts are basically useless: they do not even begin to fit together, and as such cannot be used to assemble into a working coupler.
Tim

Re: (topic was Frank) New topic - progress is being made

Rob Barker
 

"method is metal is poured into a plaster mold made from a 3D printed wax model. "

That is literally investment casting.  What Frank is having difficulties with.

Don't know if brass would be strong enough but the wax prints is his challenge, not the casting itself.

Rob Barker
Australia

On Wed, May 1, 2019 at 1:20 AM RJ Dial <radiodial@...> wrote:
I tried to find the source files on the website to no avail. The original instructions didn't work ("Home Page button and then Note from Frank"). 
Are they .stl files by chance? I just had some more detail parts printed from my design on Shapeways, and noticed the same parts would have been $16 instead of $10 if I had them made in brass instead of fine detail resin. Their method is metal is poured into a plaster mold made from a 3D printed wax model. Not sure if that would result in the tolerances needed, but thought it would be worth a try.
RJ Dial
Burlingame, CA

Re: (topic was Fra

Robert Margerum
 


I would like to get some non-conductive steam pockets for the front of my shays Frank hasn't had any for quite awhile I don't think he is making them anymore so if anyone out there can make them I would gladly pay for some thanks Rob


Sent from my Samsung Galaxy smartphone.

Re: (topic was Frank) New topic - progress is being made

Timothy Cann
 

After a brief inspection of the emerald green printed parts (my pictures above) from Frank's source files I've concluded they are of little use except as an experiment.  The Anycubic Photon's resolution is 47 microns XY and 25 microns Z, which falls far short of what is required to get the fine detail required for operational couplers.  The source files are IGS (2D/3D vector format).  I opened them natively in SolidWorks, then created a SLDPRT (SW part file).  While open, I exported each source file to STL format which can be used directly in the Photon (and a majority of other 3D printers).  The SLDPRT file is useful when making assemblies for use in my modeled SolidWorks rolling stock.

Tim

Re: (topic was Frank) New topic - progress is being made

Tom Colasurdo
 

RJ:

Just tried Sergent Engineering Home Page ... the "Instructions, Etc" button is working, click on it ... then click on the "Click here for Instructions" link ... then click on "3D Models" ... then click "Click here to download".

This will download a zip file with the IGS files.

Hope that helps.

V/r,
Tom C.



On Tuesday, April 30, 2019, 3:50:02 PM EDT, RJ Dial <radiodial@...> wrote:


I tried to find the source files on the website to no avail. The original instructions didn't work ("Home Page button and then Note from Frank"). 
Are they .stl files by chance? I just had some more detail parts printed from my design on Shapeways, and noticed the same parts would have been $16 instead of $10 if I had them made in brass instead of fine detail resin. Their method is metal is poured into a plaster mold made from a 3D printed wax model. Not sure if that would result in the tolerances needed, but thought it would be worth a try.
RJ Dial
Burlingame, CA

Re: (topic was Frank) New topic - progress is being made

Tom Colasurdo
 

Tim:

Nice work !!!  Thank you for sharing photos, and adding to the knowledge base discussion.

Is this HO scale?

Please keep us updated on your experiences.  Really interested in how the printed knuckle fits the printed coupler.

Have a great day.

V/r,
Tom C.



On Tuesday, April 30, 2019, 10:00:54 AM EDT, Timothy Cann <tcann@...> wrote:




Here's my first print without any cleanup at all.  Some work will be required to remove support remnants before trying to assemble.  At this size the parts are quite tough.  Don't know yet if they can be assembled.  At least there's no magnetic issues.

Tim

Re: (topic was Frank) New topic - progress is being made

Talmadge C 'TC' Carr
 

The ABS liquid resins may be strong enough. Stronger if a shaped music wire is inserted partway thru printing. Adding a wire substantially increase the pull strength.
The liquid printers have a castable resin which is completely consumed with almost no ash.

Talmadge C 'TC' Carr
Sn42 and Hn42 somewhere in the wilds of the Pacific Northwest
@dapenguin

Re: (topic was Frank) New topic - progress is being made

Andrew
 

RJ,

The files can be found under Instructions, Etc then “click here for instructions”.  The last one is 3D models.  That takes you to the page with the download link.

Andrew