[GreenKeys] Model 33 printer heads

Fri Mar 27 18:13:18 EDT 2020

Or, as my Proposal, a 3D print of it.

Mvh

Tomas Larsson

Sweden

Från: Eric Moore <mooreericnyc at gmail.com> 
Skickat: den 27 mars 2020 23:06
Till: tomas at tlec.se
Kopia: Greenkeys <greenkeys at mailman.qth.net>
Ämne: Re: [GreenKeys] Model 33 printer heads

I would propose checking with a machinist for a quote. There are cnc configurations that are used to do rotational engraving that may be perfect for this. 4 axis vs 5 axis machining are also very different in price up front and per unit.

As far as casting goes, finding someone to quote an exact casting in jb weld or a similar material will be exceedingly challenging. Most other materials can not handle the force of the repeated hammer strikes.

The other option is to use the flat shape on thingiverse and machine it with a standard 3 axis cnc machine, then create a cylinder by welding the ends together around a machined cylinder of solid steel. You would likely need to heat the band and cool the cylinder to get a precise fit, but a process like that was likely what teletype did based on my observations.

-Eric

On Fri, Mar 27, 2020, 16:43 <tomas at tlec.se <mailto:tomas at tlec.se> > wrote:

4 or 5 axis does not matter, the problem is the resolution, as I see it, it is probably cheaper to print them, next is casting and third is machining.

Mvh

Tomas Larsson

Sweden

Från: Eric Moore <mooreericnyc at gmail.com <mailto:mooreericnyc at gmail.com> > 
Skickat: den 27 mars 2020 22:35
Till: tomas at tlec.se <mailto:tomas at tlec.se> 
Kopia: Greenkeys <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> >
Ämne: Re: [GreenKeys] Model 33 printer heads

Yes, and perhaps unnecessary as a 4 axis machine would likely do the trick.

On Fri, Mar 27, 2020, 16:29 <tomas at tlec.se <mailto:tomas at tlec.se> > wrote:

I will certainly come back with more information.

Machining them with a 5-D router would probably be very expensive, if one wants to meet the resolution on the existing heads, most likely radious of less than 0,1 mm or so.

Mvh

Tomas Larsson

Sweden

Från: Eric Moore <mooreericnyc at gmail.com <mailto:mooreericnyc at gmail.com> > 
Skickat: den 27 mars 2020 22:20
Till: tomas at tlec.se <mailto:tomas at tlec.se> 
Kopia: Greenkeys <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> >
Ämne: Re: [GreenKeys] Model 33 printer heads

Awesome, a high resolution steel 3d printing process may be less expensive then having them machined. 

I hope it turns out well, and if you have any details on the process he is using and the resolution he can achieve I would be interested in the details.

-Eric

On Fri, Mar 27, 2020, 16:00 <tomas at tlec.se <mailto:tomas at tlec.se> > wrote:

According to my contact, it should not be a problem printing these in steel, however, solid steel might be to heavy for the printing mechanism, so I will have to modify the model, in order to make it lighter, to at least the same weight as the original head.

Mvh

Tomas Larsson

Sweden

Från: Eric Moore <mooreericnyc at gmail.com <mailto:mooreericnyc at gmail.com> > 
Skickat: den 27 mars 2020 21:45
Till: tomas at tlec.se <mailto:tomas at tlec.se> 
Kopia: Greenkeys <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> >
Ämne: Re: [GreenKeys] Model 33 printer heads

In steel a machining process would likely produce the best results according to my friend.

https://www.cnccookbook.com/4-axis-cnc-in-2020-the-definitive-guide/

Though I have no idea what crazy 3d printing tech exists nowadays.

There are companies that could be engaged for quotes. At minimum it should be compared in terms of cost/resolution/strength. I could not find a vendor with a high enough resolution in steel myself.

-Eric

On Fri, Mar 27, 2020, 15:31 <tomas at tlec.se <mailto:tomas at tlec.se> > wrote:

Yes it did, and thats why I reacted

Quote

A couple of wheels are available for museums or educators who need them. Please contact me directly off list. These are direct casts from original wheels and do not contain the signature present in the 3d models.

No further details on the process will be provided, as it required a lot of advanced technique and my friend is not interested in writing a long detailed guide as would be required

End quote

My intention is to make them available to everyone at basicaly self cost price, I do not intend to make any money on this. However, if I am going to order more than that is sold, then I have to make profit.

Mvh

Tomas Larsson

Sweden

Från: Paul Heller <paul0926 at comcast.net <mailto:paul0926 at comcast.net> > 
Skickat: den 27 mars 2020 21:17
Till: Eric Moore <mooreericnyc at gmail.com <mailto:mooreericnyc at gmail.com> >
Kopia: tomas at tlec.se <mailto:tomas at tlec.se> ; Greenkeys <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> >
Ämne: Re: [GreenKeys] Model 33 printer heads

Your first post did make it out to the group. I saw it

Paul
W2TTY

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On Mar 27, 2020, at 2:15 PM, Eric Moore <mooreericnyc at gmail.com <mailto:mooreericnyc at gmail.com> > wrote:

Hello, I tried to send the message below to the list a couple of days ago but it didn't go through. Here it is again.

Hello, I am writing to let you all know that my friend made a 3d model of an asr 33 type wheel.

 <https://www.thingiverse.com/thing:4159598> https://www.thingiverse.com/thing:4159598 

 He used this to 3d print a high resolution model, and then created a mold from that print, cast a new wheel in jb weld, and that wheel was tested in an ASR 33 and it worked. The model is provided for anyone who wants to attempt casting a new wheel in jbweld or to use any other manufacturing process they think may work.

A couple of wheels are available for museums or educators who need them. Please contact me directly off list. These are direct casts from original wheels and do not contain the signature present in the 3d models.

No further details on the process will be provided, as it required a lot of advanced technique and my friend is not interested in writing a long detailed guide as would be required.

This model also allows for people to create new wheels with custom fonts, have fun!

On Fri, Mar 27, 2020, 14:21 <tomas at tlec.se <mailto:tomas at tlec.se> > wrote:

Well, I got the idea from that post, however, as i understood it, they used the 3D-print to make a cast,  subsequently casting in epoxy.

And I am using the stl-file from Thingiverse.

Mvh

Tomas Larsson

Sweden

Från: Jeffrey Golas <jeffg at junknet.net <mailto:jeffg at junknet.net> > 
Skickat: den 27 mars 2020 19:39
Till: tomas at tlec.se <mailto:tomas at tlec.se> 
Kopia: greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> 
Ämne: Re: [GreenKeys] Model 33 printer heads

There is someone working on exactly this, if you search Thingiverse they have a test model there.

Jeff

On Mar 27, 2020, at 1:32 PM, tomas at tlec.se <mailto:tomas at tlec.se>  wrote:

Dear folks.

I am looking into, having a printerhead to my Model 33 3D-printed i steel, is there any interest to have some more printed out.

The guy I am talking to says that it should be doable to 3D-print it, obviously it means that one can have any type of Head, with any characterset made in this way.

Currently I have no Idea what the cost would be, but wil have an indication of price in the near future.

Mvh

Tomas Larsson

Sweden

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