Thank you for the feedback. Can you machine these threads in Trueform?
At 09:50 AM 3/24/99 -0600, you wrote:
>polycarb does not machine very well. i suppose i should have been more
>specific and stated that "sls nylon materials machine very well". i never
>even think of poly anymore because trueform and nylons have taken it's
>place.
>
>wp.
>
>-----Original Message-----
>From: Tom Richards
>Sent: Wednesday, March 24, 1999 12:33 PM
>To: wpattison@4ddesign.com
>Cc: rp-ml@bart.lpt.fi
>Subject: RE: 1/4-20 thread?
>
>Good idea! Which sls material are you machining? Carbonate?
>
>At 08:32 AM 3/24/99 -0600, you wrote:
>>i have never actually built any threads finer than about 3/4-16, but i am
>>speaking from several years experience as a dtm applications engineer, and
>>more recently as a user of sanders, sla, and sls. given that the nominal
>>laser beam diameter in the sls process is 0.010"-0.020" (depending on
>>process parameters), and that the melt zone it creates will be similar in
>>magnitude, you quickly run into resolution problems with features like a
>>1/4-20 thread. the beauty of sls, though, is that it machines so well.
>> so, save the hassle, not to mention the cad time to create the thread in
>>the first place, and just drill and tap that sucker.
>>
>>remember, the key to rp success is first understanding your fundamental
>>prototyping requirements, then picking the right tool for the job...
>>
>>wp.
>>
>>-----Original Message-----
>>From: Doug Bucci
>>Sent: Tuesday, March 23, 1999 9:57 PM
>>To: wpattison@4ddesign.com; 'Ray Brandes'
>>Cc: rp-ml@bart.lpt.fi
>>Subject: Re: 1/4-20 thread?
>>
>>Will,
>>In response to you & Ray Brandes, I want to build both the male & female
>>threads in my jewelry
>>that will eliminate my need for commercial hardware & fasteners.
>>I am also interested in why you are dissatisfied with the your result of
>>building threads in SLS?
>>
>>Thanks Again-
>>Douglas Bucci
>>
>>PS-I would like to thank everyone for their responses.
>>
>>My MFA exhibition:
>>http://blue.temple.edu/~crafts/mjcc/local/gallery/thesis/bucci/indexdb.
>html
>>
>>-----Original Message-----
>>From: will pattison <wpattison@4ddesign.com>
>>To: 'Ray Brandes' <rbrandes@ingeniusatg.com>; Doug Bucci
>><BUCCI@prodigy.net>
>>Cc: rp-ml@bart.lpt.fi <rp-ml@bart.lpt.fi>
>>Date: Tuesday, March 23, 1999 12:41 PM
>>Subject: RE: 1/4-20 thread?
>>
>>
>>>i doubt you'll be satisfied with the result making this thread directly.
>>> other than with sanders and maybe actua, you will have a hard time
>>>creating this thread in any rp machine.
>>>
>>>you didn't say if it was male or female, but either way, i would
>recommend
>>>a secondary process. if it's female, model in a pilot hole, then drill
>>and
>>>tap post-build. sls nylon materials machine very well, so you should
>have
>>>no problem.
>>>
>>>will pattison
>>>product development engineer
>>>4d design
>>>
>>>-----Original Message-----
>>>From: Ray Brandes
>>>Sent: Tuesday, March 23, 1999 9:49 AM
>>>To: Doug Bucci
>>>Cc: rp-ml@bart.lpt.fi
>>>Subject: Re: 1/4-20 thread?
>>>
>>>I assume it is a 60deg V thread, but is it male or female? What class?
>>>Make the male body .25" diameter to the theoretical sharp point then
>>>remove .001 to .002 from the diameter.
>>>Make the female the same .25" to the theoretical sharp but add .001 to
>>>.002 to this.
>>>Does it have to fit an existing part? Can you make it heavy and then run
>>>a tap or die on it?
>>>-Ray
>>>
>>>Doug Bucci wrote:
>>>
>>>> Hello, I need to create a 1/4-20 thread in SLS can anyone provide me
>>>> with the minimum tolerances for creating this? Thank you,Douglas Bucci
>>> << File: ATT00002.html >>
>>
>>
>>For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>>
>>
>
>
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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