Mixed 2d and 3d import

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Tailmaker
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Mixed 2d and 3d import

Post by Tailmaker »

First a disclaimer...I am not much of a gun fanatic. That said, I had an old Crosman multipump pellet air pistol (P1322) around that I wanted to give some bling upgrade. Given that this is a cheap $50 piece of equipment, it is actually pretty accurate. The project was to make it a carbine with shoulder stock and better pump lever.

The main challenge from the design side was to mimic closely the ergonomic shape of the grips and the required internal fit with the mechanical components. This was done with separate 3d design software, took me a couple of days. I guess this could be done with Aspire but I am not so good at that.

Since a 3d-toolpath usually does not make clean cuts for precise mechanical features, I ex/im-ported the 3d design as .stl and the mechanical drawings as .dwg from the same model into VcarvePro. When opening the 2d drawing "centered" and later importing the 3d model also "centered", VcarvePro matched them perfectly. I am quite happy with the result.

So...this was the original air pistol. Pump lever and grips were cheap plastic.
Original.jpg
Shoulder stock as designed and exported as .stl. This is a set of symmetrical halves, later glued together with dowel alignment:
StockStl.jpg
Mechanical features exported as .dwg:
StockDrawing.jpg
Result machined with 1/8 ballnose (3d paths) and 1/8" end mill (2-d paths). Double sided project in Zebrawood, finished with Danish Oil and acrylic clearcoat. Yes, it did take about an hour of sanding with 80/220/400 grit.
DSC01843.JPG
To be continued...
Last edited by Tailmaker on Wed May 20, 2020 3:20 am, edited 4 times in total.

Tailmaker
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Re: Mixed 2d and 3d import

Post by Tailmaker »

Continued....
I made a new pump lever in similar fashion with improved leverage:
DSC01844.JPG
Other improvements are the red dot sight left over from another defunct project and some brass bling:
DSC01845.JPG
Still waiting for the longer carbine-appropriate barrel (damn Covid virus).

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Re: Mixed 2d and 3d import

Post by BillK »

Really cool project and love that wood. Only thing I would have reservations about is the end piece. Very thin through end grain. Maybe zebra wood is tougher than I know as I haven’t worked it. Super idea and design..
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Tailmaker
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Re: Mixed 2d and 3d import

Post by Tailmaker »

BillK wrote:
Wed May 20, 2020 3:27 am
.....Only thing I would have reservations about is the end piece. Very thin through end grain. Maybe zebra wood is tougher than I know as I haven’t worked it....
Good and valid point. But keep in mind this not a 12-gauge shotgun. The recoil is not perceptible and this stock would even hold up when made from cardboard.

Zebrawood is quite hard and carves nicely but it is brittle and the strength across the grain is so-so. For this project it worked well but I would not design a firearm shoulder stock that slim. My first sample parts were made from Baltic Birch plywood. Much stronger but just did not look as nice.

Forgot to mention, in case somebody has such a toy, I can mail you the files (I suppose too big for this forum server).

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Re: Mixed 2d and 3d import

Post by alfredom »

Great project, I really like what you did!

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scottp55
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Re: Mixed 2d and 3d import

Post by scottp55 »

Beautiful job on those improvements G. :)
As a 10 yr old wasn't allowed to bring my .22 Remington home, so bought the multi-pump Crosman rifle :)
As you said, pretty accurate(and quiet:)...accurate enough to shoot dandelion heads off from a distance :)
Hated to give it to a friend, but like my RWSs now.
REALLY nice looking job!!
Congrats!
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Go instead where there is no path, and leave a Trail"
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Re: Mixed 2d and 3d import

Post by mtylerfl »

scottp55 wrote:
Thu May 21, 2020 12:41 pm
... pretty accurate(and quiet:)...accurate enough to shoot dandelion heads off from a distance :)
So THAT’S how to eliminate dandelions in the yard! Sneak up on ‘em and shoot their heads off. Can’t wait to try this myself!
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scottp55
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Re: Mixed 2d and 3d import

Post by scottp55 »

No sneaking is needed Michael :D
Shoot from an elevated porch to prevent potting a neighbor....railing makes a Nice bench rest:)
Use wad cutters for best yellow explosion:)
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Go instead where there is no path, and leave a Trail"
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mtylerfl
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Re: Mixed 2d and 3d import

Post by mtylerfl »

:D
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Tailmaker
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Re: Mixed 2d and 3d import

Post by Tailmaker »

scottp55 wrote:
Thu May 21, 2020 1:24 pm
No sneaking is needed Michael :D
Shoot from an elevated porch to prevent potting a neighbor....railing makes a Nice bench rest:)
Use wad cutters for best yellow explosion:)
Well, we have ample dandelions and a large back yard. But, alas, the City of Fort Collins prohibits the discharge of such weapons of mass destruction (and of BB guns, painball guns, slingshots, bows and arrows, crossbows etc.) within city limits. I believe I am still O.K. to throw a rock in my back yard and hopefully shoot a foam bolt with a Nerf Gun. I heard somebody called the police on a neighbor who shot a few squirrels with a pellet gun. Funny enough I could open carry an AR15 or a Glock (which I don't have) in the city as long as I don't pull the trigger and launch a projectile. Strange world.

Anyway, I can still plink with that air gun in my basement. I have a 50 feet aisle that can serve as a shooting gallery.

Reminds me...my location in this forum is still Pasadena, CA. Does anybody know how to change it to Colorado? No option for that in my forum profile as far as I can see.

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gkas
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Re: Mixed 2d and 3d import

Post by gkas »

Tailmaker wrote:
Fri May 22, 2020 2:11 am
Reminds me...my location in this forum is still Pasadena, CA. Does anybody know how to change it to Colorado? No option for that in my forum profile as far as I can see.
Profile/location??

Tailmaker
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Re: Mixed 2d and 3d import

Post by Tailmaker »

Under "User Control Panel" and "Profile" I can change my email address and my password under "edit account settings" and I see "edit Avatar" but I don't see the "location" input.

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gkas
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Re: Mixed 2d and 3d import

Post by gkas »

Second from the bottom, above Facebook.
Profile - Location.jpg

Tailmaker
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Re: Mixed 2d and 3d import

Post by Tailmaker »

Hmm. Looks different on my profile. Am I in the wrong place?
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gkas
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Re: Mixed 2d and 3d import

Post by gkas »

1. In the pulldown from your UserName (Home, FAQ, Quick, Links, GKAS) select 'USER CONTROL PANEL'
2. Tab bar, (Overview, Profile, Board Preferences) Select PROFILE tab.
3. It says 'Edit profile [ View profile ]'
4. 2/3 down that page it says 'Location:'. Change that.....

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