A basic structure and mechansim Re: 3D printing, powder spreading
Posted by
Graham Stabler
on 2007-05-03 04:55:24 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@...> wrote:
the ratios between the servo motor and the drive as they are, finding
a set of pulleys etc of the right diameter might be a challenge. That
said if you find something of about the right size you can use one of
the paper take up rollers and the paper feed encoder to make a wheel
encoder. The cable drive system means I can get exactly the same
reduction ratios for pretty much no cost and only need to turn a few
rollers and perhaps pulleys.
As for the rest of your description; its pretty much as I imagined
they might build it although I'm also not sure they bother having the
gap at the sides of the build area, its raised up but there seemed to
be some little fenders near the ends of the rollers. If the sides of
the build box are beveled inwards any little bits of excess will fall
in around the edges, the build platform lowers before printing anyway
so it would not cause a problem.
I'm not an overly big fan of using 4 leadscrews, I've never done it
but it seems a recipe for problems potentially. You are using the
grommets on your tubes and the fit between the piston and box as your
linear bearings essentially, there is bound to be some rocking?
Plenty good enough for the supply don't know about the build area.
If I use my piston idea I'll use single lead screws into nuts in the
"con rod" as you describe, that seems a pretty good solution.
This is the kind of pump I'm talking about:
http://www.gifts2go.eu/shop/index.php?main_page=product_info&cPath=4&products_id=28
Obviously a proper built solution would be better in the long run.
for the shake rattle and empty you could just add a door to the bottom
of the tank one that only opens upwards, then just start prodding it
with a solenoid.
Graham
>I've lots of printer and scanner parts but I wanted to try and keep
> Graham,
>
> Thank you for the additional details.
>
> A quick thought: Cheap and/or thrown-away desktop scanners are now
> widely available over here (They're in all the thrift stores for a
> few bucks). these would be a cheap sources for an additional axis of
> travel with belts and guides...
the ratios between the servo motor and the drive as they are, finding
a set of pulleys etc of the right diameter might be a challenge. That
said if you find something of about the right size you can use one of
the paper take up rollers and the paper feed encoder to make a wheel
encoder. The cable drive system means I can get exactly the same
reduction ratios for pretty much no cost and only need to turn a few
rollers and perhaps pulleys.
As for the rest of your description; its pretty much as I imagined
they might build it although I'm also not sure they bother having the
gap at the sides of the build area, its raised up but there seemed to
be some little fenders near the ends of the rollers. If the sides of
the build box are beveled inwards any little bits of excess will fall
in around the edges, the build platform lowers before printing anyway
so it would not cause a problem.
I'm not an overly big fan of using 4 leadscrews, I've never done it
but it seems a recipe for problems potentially. You are using the
grommets on your tubes and the fit between the piston and box as your
linear bearings essentially, there is bound to be some rocking?
Plenty good enough for the supply don't know about the build area.
If I use my piston idea I'll use single lead screws into nuts in the
"con rod" as you describe, that seems a pretty good solution.
This is the kind of pump I'm talking about:
http://www.gifts2go.eu/shop/index.php?main_page=product_info&cPath=4&products_id=28
Obviously a proper built solution would be better in the long run.
for the shake rattle and empty you could just add a door to the bottom
of the tank one that only opens upwards, then just start prodding it
with a solenoid.
Graham
Discussion Thread
Graham Stabler
2007-05-02 03:17:53 UTC
3D printing, powder spreading
laserted007
2007-05-02 05:27:29 UTC
Re: 3D printing, powder spreading
turbulatordude
2007-05-02 06:57:25 UTC
Re: 3D printing, powder spreading
Graham Stabler
2007-05-02 07:01:46 UTC
Re: 3D printing, powder spreading
Graham Stabler
2007-05-02 07:03:25 UTC
Re: 3D printing, powder spreading
Fernando
2007-05-02 12:16:17 UTC
Re: 3D printing, powder spreading
Fernando
2007-05-02 12:32:00 UTC
Re: 3D printing, powder spreading
Fernando
2007-05-02 13:01:16 UTC
Re: 3D printing, powder spreading
Graham Stabler
2007-05-02 16:48:53 UTC
Re: 3D printing, powder spreading
Fernando
2007-05-02 17:14:06 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-02 21:02:10 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-02 21:06:57 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-02 21:09:34 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-02 21:31:07 UTC
OT thank you Fernando Re: 3D printing, powder spreading
Fernando
2007-05-02 21:39:41 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-02 21:40:24 UTC
Patent PDF tool/site Re: 3D printing, powder spreading
Graham Stabler
2007-05-03 01:53:05 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-03 03:42:56 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
Graham Stabler
2007-05-03 04:55:24 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
laserted007
2007-05-03 07:07:38 UTC
Re: 3D printing, powder spreading
vrsculptor
2007-05-03 11:58:04 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
Graham Stabler
2007-05-03 14:59:17 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
Graham Stabler
2007-05-03 15:00:17 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-03 15:32:10 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
Fernando
2007-05-03 15:49:52 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
John
2007-05-03 20:18:10 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-04 00:40:14 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-04 00:44:54 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
ballendo
2007-05-04 00:54:03 UTC
OT patent info Re: 3D printing, powder spreading
Graham Stabler
2007-05-04 01:52:25 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
ballendo
2007-05-04 02:08:47 UTC
OT A basic structure and mechansim Re: 3D printing, powder spreading
Graham Stabler
2007-05-04 04:15:29 UTC
OT patent info Re: 3D printing, powder spreading
Graham Stabler
2007-05-04 04:28:22 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
dandumit
2007-05-04 05:39:33 UTC
Re: 3D printing, powder spreading
vrsculptor
2007-05-04 07:27:45 UTC
Re: 3D printing, powder spreading
laserted007
2007-05-04 07:33:19 UTC
Re: 3D printing, powder spreading
gsi11135
2007-05-04 07:38:31 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
gsi11135
2007-05-04 07:39:59 UTC
OT patent info Re: 3D printing, powder spreading
laserted007
2007-05-04 07:48:55 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
laserted007
2007-05-04 08:02:37 UTC
A basic structure and mechansim Re: 3D printing, powder spreading
laserted007
2007-05-04 08:09:11 UTC
Re: 3D printing, powder spreading
laserted007
2007-05-04 08:13:16 UTC
Re: 3D printing, powder spreading
Graham Stabler
2007-05-04 12:53:44 UTC
Re: 3D printing, powder spreading
dandumit
2007-05-04 23:38:08 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-05 01:18:26 UTC
OT patent info Re: 3D printing, powder spreading
ballendo
2007-05-05 01:28:58 UTC
Re: 3D printing, powder spreading
ballendo
2007-05-05 01:31:54 UTC
Re: 3D printing, powder spreading
Graham Stabler
2007-05-05 01:58:37 UTC
Re: 3D printing, powder spreading
David G. LeVine
2007-05-05 15:19:13 UTC
Re: [CAD_CAM_EDM_DRO] Re: 3D printing, powder spreading
John
2007-05-05 17:14:55 UTC
Re:OT patent info Re: 3D printing, powder spreading