BAD NEWS 3D printed spoked driver centres go eccentric

[Brian McKenzie]

There are plenty of companies in the UK and other parts of the world who can do the same with "lost resin" or "lost plastic" casting.

As Nigel says, there's a great selection of businesses wherever you are, that offer to print, cast, machine whatever you want, from your own CAD file. If you can, or have someone draw it for you, check out Craftcloud® | Streamlined Service for 3D Printing & CNC Machining to get an instant quote and an idea of the materials and services on offer.

The original Shapeways business of years ago, was early in this field - and initially I had good results from them.

But as Lawrence has alluded to above, some businesses seem better in their specialist area than others. Lawrence is a master of finely detailed 3D printing, so that allows him and customers off to a good start.

-Brian McK.

 

[Mike W]

Are you sure the problem is caused by the unequal volume of plastic over the area of the wheel, rather than pressure? I assume the model has stood on its wheels, so some spokes in tension and others in compression?
Mike

 

[-missy-]

As Nigel says, there's a great selection of businesses wherever you are, that offer to print, cast, machine whatever you want, from your own CAD file. If you can, or have someone draw it for you, check out Craftcloud® | Streamlined Service for 3D Printing & CNC Machining to get an instant quote and an idea of the materials and services on offer.

-Brian McK.

Im sorry Brian but where are all these magical companies that are more than willing to cast things for you? I have been searching for months to try and find a company within the UK happy to help and I either get ignored, turned down, or drag things out for so long because they are simply not interested.

I would love to know of any casting companies that are more than happy to help me out. Im more than happy supplying a list of companies I have tried but failed getting anywhere with!

Julia.

 

[Dan Randall]

Im sorry Brian but where are all these magical companies that are more than willing to cast things for you? I have been searching for months to try and find a company within the UK happy to help and I either get ignored, turned down, or drag things out for so long because they are simply not interested.

I would love to know of any casting companies that are more than happy to help me out. Im more than happy supplying a list of companies I have tried but failed getting anywhere with!

Julia.

Hi Julia

I’ve not tried myself yet, but was going to drop this UK based guy a line soon about some potential casting work….

Engine-ious Models

Engine-ious Models produce high quality, fine scale etched metal kits and brass castings, designed for O Gauge at a scale of 7mm to the foot, 1:43.5. We specialise in the small and more unusual industrial locomotives of the 1800's and early 1900's, spending time researching in depth, developing...

www.engine-ious.co.uk

Be interested to know how you get on, with whoever you choose.


Regards

Dan

 

[Osgood]

You can chat to the proprietor CEO of Engine-ious, @John Baker , on here!

7mm - Manning Wardle Old Class i: a self-designed 'kit'

If you followed my last build thread on RMWeb (Manning Wardle L Class 0-6-0 (Agenoria Kit)), you’ll know I love a good Manning Wardle. For the last year or so, on and off, I have been designing etches and castings for an Old Class I in 7mm scale, a lovely little loco that was used by contractors...

www.westernthunder.co.uk

 

[Dan Randall]

You can chat to the proprietor CEO of Engine-ious, @John Baker , on here!

7mm - Manning Wardle Old Class i: a self-designed 'kit'

If you followed my last build thread on RMWeb (Manning Wardle L Class 0-6-0 (Agenoria Kit)), you’ll know I love a good Manning Wardle. For the last year or so, on and off, I have been designing etches and castings for an Old Class I in 7mm scale, a lovely little loco that was used by contractors...

www.westernthunder.co.uk

Thanks - I knew he’d posted on WT, but I couldn’t remember his name (sorry John!), or the thread title!


Regards

Dan

 

[-missy-]

Thanks guys.

I have sent him an email. Hopefully, it works out ok.

Julia

 

[simond]

You can chat to the proprietor CEO of Engine-ious, @John Baker , on here!

7mm - Manning Wardle Old Class i: a self-designed 'kit'

If you followed my last build thread on RMWeb (Manning Wardle L Class 0-6-0 (Agenoria Kit)), you’ll know I love a good Manning Wardle. For the last year or so, on and off, I have been designing etches and castings for an Old Class I in 7mm scale, a lovely little loco that was used by contractors...

www.westernthunder.co.uk

Beat me to it!

 

[Mike Trice]

I know a few people have printed with an engineering grade (machinable) resin in the past: eSUN LCD Hard Tough 3D Resin 0.5KG/1KG

Do we know if this makes a difference.

 

[Graeme King]

Is there a time, post-production, when significant movement in the printed material has ceased to be significant. If so, is one possible answer to the eccentricity problem simply a "maturing period" for the print prior to centre-boring?

 

[Brian McKenzie]

. . . but where are all these magical companies that are more than willing to cast things for you? I have been searching for months to try and find a company within the UK happy to help and I either get ignored, turned down, or drag things out for so long because they are simply not interested.

Late getting back to to you, sorry. A search for "Brass jewellery casting in UK" brought up several likely suitable services. Whereas a search for "Investment casting from digital files" listed suppliers of industrial components.

One example: Jewellery Casting

 

[Brian McKenzie]

Are you sure the problem is caused by the unequal volume of plastic over the area of the wheel, rather than pressure?

Yes, unequal volume of plastic seems to be the principal contributor to this issue, aided to a small degree by use of a high strength grade of Loctite.

​

I did check the spare sets of wheels - bored for axles but not fitted to them. The runout is less at only 2 thou TIR (tiny, I know ), but suspect if Loctite 680 was used on the axle (I won't), the runout would increase to that of the wheelsets in use.

I assume the model has stood on its wheels, so some spokes in tension and others in compression?

It spends most of its time upside down or in bits

 

[Brian McKenzie]

I know a few people have printed with an engineering grade (machinable) resin in the past: eSUN LCD Hard Tough 3D Resin 0.5KG/1KG

Do we know if this makes a difference.

Mike, specification of the "Somos Taurus" material used is here:

https://www.stratasys.com/siteassets/materials/materials-catalog/stereolithography-materials/somos-taurus/mds_sl_somos-taurus_0123a-1.pdf?v=491cab

It's quite solid and robust - but do rig up a vacuum cleaner if machining it, as the fine dust created floats in the air.