Scope wheels
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Scope wheels
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Topic: Scope wheels (Read 493 times))
scotton
Shooter
Posts: 37
Scope wheels
«
on:
December 27, 2022, 11:07:40 PM »
To follow up on my blatherings about adjustable hamsters, here are some blatherings about scope wheels.
I've tested a few wheels on thingiverse and the one I prefer is called "Scope Parallax Nautilus Wheel". It comes in two sizes, I like the 260mm version. The shape really nails it, and the attachment point is in the wheel itself instead of having little ears that stick out. I've cracked a couple of wheels at the ears, so it's good to get rid of that failure point.
I've got three different Falcon scopes that have three different parallax wheel diameters. Before I print a whole wheel, I go into Tinkercad and trim off everything except the ring that attaches to the scope. Then I test print the attachment ring and confirm the fit before committing to a whole wheel. Another nice thing about this design is that it's easy to change the size of the ring for different scopes. If you can make a cylinder in Tinkercad, you can make the wheel fit just about any scope.
Most wheels are a little too thin. Some gun and scope combos don't like a thin wheel because it rubs on the gun. This wheel comes in 14mm wide, which is plenty wide enough to move the wheel away from the gun and still have enough bite on the scope wheel.
One issue I have with most 3d printed wheels is getting tape to stick, so I rough the outside of the wheel with some sandpaper. Then I put on a layer of waterproof first aid tape. I mark the tape with some reference marks in pencil (ink tends to smear on this tape because it's waterproof), then I tape on a piece of copier paper to put my actual marks on the wheel. Cut long-ways, an 11 inch strip is perfect.
One last tip. Assuming you are setting up for field target, make sure your 55 yard mark is towards the end of the wheel with a little room to spare before marking the rest of your yardages. If you start at 10 yards and work your way out, you may run out of runway when you get to 55 yards. The good news is you will probably only make this mistake once.
I think that's about all I know about scope wheels. Here's a picture of the wheel. I was blowing through some gold filament testing some designs.
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Keen
Marksman
Posts: 319
yes
Real Name: Chris
Re: Scope wheels
«
Reply #1 on:
January 08, 2023, 06:42:24 PM »
Hi scotton. My somewhat mentally deranged brother sent me a 3d printer out of the blue a couple of months ago. I'd never thought of buying one, let alone asking for one, but there you go, sometimes you get what you deserve
In any case, I've not yet made anything other than a spool holder(It's a FlashForge Adventurer 3 Lite), but I'm now interested in trying to do something with it, rather than it serving as a lookalike Easy Bake Oven paperweight. The focus wheel looks like a great project but I'm not sure of several things. Needless to say I know virtually nothing about the appropriate printing material for something like the focus wheel pictured, so suggestions would be very helpful, and the printer has a max printing size limit of about 6 in x 6 in.
Would you be willing to give me a couple of pointers as to where and how I could start a project like this? FWIW I've been too intimidated to even buy any additional filament for fear of buying the wrong stuff.
Thanks for any input or help,
Happy New Year to You and Yours,
Chris.
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USA, New York.
scotton
Shooter
Posts: 37
Re: Scope wheels
«
Reply #2 on:
January 09, 2023, 12:53:45 AM »
Well, I've only been doing this for about a month and a half so take my advice with a tablespoon of salt, but it has been an intensive month.
For filament, I've tried Overture PLA, Overture PLA Pro and Esun PLA+. They all work fine, I think the Esun PLA+ gives the best cosmetic results. I don't know how temperature stable the PLA+ will be in the summer, so I'm about to start trying PETG now that I have my prototypes dialed in. I would definitely start with PLA or PLA+. Once you get a spool or two under your belt, you will have enough knowledge to start printing with PETG. AT least, that's what I'm hoping.
The Ender 3V2 bed size is about 9x9. You wouldn't be able to print the Nautilus design that I like on a 6x6 bed because it's 7 inches wide. There are other wheels available on Thingiverse that you should be able to print. The key is to get the turret wheel size correct. I would suggest getting familiar with Tinkercad, it's really easy to learn. Then you can print the first 4 layers of a wheel and stop the print, then test it on the scope. If it's too tight or loose, adjust it in Tinkercad and try again. You could also adjust the scaling in your slicer program (I like Utlimaker Cura), but it might make the recess for the nut a little wonky. Or you could just print it too small and sand it to fit.
The key to 3D printing is bed levelling. I know it's been said before and it's not very sexy, but 98% of the print quality comes down to the levelness of the bed and the distance of the nozzle to the bed. Once you get a feel for the proper bed height, everything else is pretty easy. So before you load your filament for the first time, get a sticky note and write "Is the bed level?" and stick it right next to the control panel. Then, when you are printing something and the first layer won't stick to the bed, or the extruder starts making clicking and grinding noises, or your bed looks like a plate of old spaghetti, look at the sticky note and re-level your bed. Sometimes I can go for 15 or 20 prints without re-levelling the bed, sometimes I have to do it every other print. It doesn't make sense, it just is. Anytime I have an issue, step 1 is level the bed. Step 2 is level the bed again. Step 3 is check the belts, check the nuts, check the nozzle, then level the bed.
Lastly, a warning. This slope is slippery and steep. It might be better for your mental and emotional well being to do something more productive with your life, like getting addicted to heroin.
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TorqueMaster
N.U.A.H 100 Yard Expert
Sharp Shooter
Posts: 665
BMSMA
Real Name: Bob
Re: Scope wheels
«
Reply #3 on:
January 11, 2023, 03:34:45 AM »
I'll second most of what scotton said.
PLA is very forgiving to print, great to start out with. It WILL deform in a summertime hot car, ideally your scope wouldn't be subjected to that, so it'll be good until you advance to different materials.
Tinkercad is a good place to start designing / modifying in 3D.
Bed leveling, extruder calibration, and dialing in each filament for proper extrusion will go a long way towards getting good prints.
Passing the needle, lol.
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USA, Mid-Missouri
Keen
Marksman
Posts: 319
yes
Real Name: Chris
Re: Scope wheels
«
Reply #4 on:
January 12, 2023, 04:32:06 PM »
Heroin it is then.
Those belts will be useful for something
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USA, New York.
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Scope wheels