I'm finally moving on my scopecam project. I've had this high speed Casio for years and never used it.
This is the first iteration, it needs a little tweaking. Hot off the printer.
This reminds me of the time I tried bonding a piece of picatinny rail to the ventilated rib on my .357
With epoxy.
Yeah. Hold my beer...
First shot the red dot and rail came cleanly off, flew over my head, and landed behind me.
If your focal distance is correct (as per this mock-up) it wouldn't hurt to add some length to that mounting ring (4 screws) and maybe some 2 sided tape inside. Maybe a shelf in front of and behind the camera also.
Depending on how well your layers are bonded, it might make more sense to make that top ring from a different orientation, perhaps laid on it's side?
Not criticizing, just imagineering.
T
If your focal distance is correct (as per this mock-up) it wouldn't hurt to add some length to that mounting ring (4 screws) and maybe some 2 sided tape inside. Maybe a shelf in front of and behind the camera also.
Depending on how well your layers are bonded, it might make more sense to make that top ring from a different orientation, perhaps laid on it's side?
Not criticizing, just imagineering.
Constructive criticism is always welcome, even more if speaking from experience.
V2; hot off the printer this morning(5 hour print). Focal length was way off, ring was enlarged, supporting area attaching the ring to the camera platform was tapered all the way to the front of the ring.
The arrow points to "bridging" material that will be removed as well as from the bolt slot and the front of the ring. This was printed standing on end to produce the least amount of bridging. Maybe one more iteration?
The layers are perpendicular to the length of the scope so delamination shouldn't catastrophic. "Hold my beer".
My actual suggestion involved asking about that eye piece diameter, and trying to find a cantilever scope mount which could be modded to ride.
That IS basically the shape you're making.
But, the eyepiece diameter...
There is a LOT of picatinny stuff in circulation, and I understand that this is a 3D/free project, just pointing at things.
40mm ring
PICTURE ONLY FOR COMPARISON TO 1 INCH SCOPE TUBE
OR
I crafted this from a scope ring about 5 years ago, it should be around here somewhere. The ring is aluminum and the rail is steel I think. The rail can be cut to focal length when it's determined. I milled off the dovetail mount on the ring, drilled and tapped it. I posted about here.
We'll see how this goes and that option will remain on the table.
Found it:
This is what is coming off the printer now; 4th iteration. It should be dialed in.
I thought to round off the front of the camera platform after I was 2/3 of the way through this 5 1/2 hour print so it won't make this round.
This is as lean and elegant as I dare make this printed part.
After 3 days, 25 hours of printing and 4 iterations I have a working mount that is dialed in. I'll go through some of the design and printing for those interested and who may not be familiar with 3D printing.
This was the final design. Final versions are cleaned up with radiused and filleted joints and corners to reduce stress risers and soften the look.
This is the print orientation and what it looks like when it comes off the printer.
V2 vs V3.
Mounted.
Results.
I'll have to review a large camera manual, mount the scope, then its off to the range.
This was quick proof-of-concept testing. It is evening time when this was shot and it is an overcast grey sky right before rain but I couldn't wait. You can barely see a .177 pellet at 900 FPS immediately after the recoil, 1 frame. My understanding of high speed video is, light is your friend. My buddy is a no-show for this clip.
Details are in the video description.
I made a version 4. I have radiused and filleted most edges, rounded the front and added a hole at the neck to reduce weight. I reduced the camera step 2 mm and widened the screw slot which should center the camera perfectly. The mount is extremely stiff.
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I made a small bed adjustment on my printer and it produced a great print. It still needs some tweaking to produce better cosmetics but there are no issues with the strength of the prints.
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I've tested the V3 mount on two scopes and a spotting scope and it has held up fine.
I'm not happy with the video I've produced so far but I haven't had good light and the setups are shoddy as I gain experience. I've test 480 FPS and 1000; VERY grainy so far, and alignment is critical.
More to come.
Testing seems to indicate it needs a hoody.
V5
I'm up to V6 and I'm pretty sure I have it dialed in. I need to make one minor tweak to the camera base, a 2mm rise but I have it shimmed for now and I'm not going to print for 10 hours for that.
V6. Rock solid and weighs in at 3.3 ozs.
This was shot in bright sunlight, 1000 FPS at 25 yards. No projectiles, just a system check. A subsonic bullet would cover that distance in 68 milliseconds which should be 68 frames, about 30 @ 480 FPS. Twice that @ 50 yards. Range on Thursday hopefully.
https://i.imgur.com/JEQqLfD.mp4
