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Inconsistent Holding Force at Different Points of Linear Actuator

Last post by Engratia « Tue Jun 02, 2026 2:04 am
Posted in Off-Topic Hobbies

by Engratia » Tue Jun 02, 2026 2:04 am » in Off-Topic Hobbies

Hello everyone.

Our automated tooling relies on an electric linear actuator ( ) for segmented, fixed-point locking. Drive parameters and power...

0 Replies

1229 Views

Last post by Engratia
Tue Jun 02, 2026 2:04 am
Compression?

Last post by overdraft « Mon Apr 27, 2026 12:48 pm
Posted in Combustion Cannons

by overdraft » Mon Apr 27, 2026 12:48 pm » in Combustion Cannons

Hi All!
I'm making a basic spud gun for an upcoming distance competition that is restricted to hairspray as fuel.
Obviously combustion in engines is...

0 Replies

6601 Views

Last post by overdraft
Mon Apr 27, 2026 12:48 pm
Leveraging server-grade hardware for high-precision cannon simulations?

Last post by boteh35959 « Mon Apr 20, 2026 9:01 am
Posted in Off-Topic Hobbies

by boteh35959 » Mon Apr 20, 2026 9:01 am » in Off-Topic Hobbies

Hey guys,
I’ve been a long-time fan of the technical depth on this board. Lately, I've been getting really into the weeds with valve efficiency and...

0 Replies

3657 Views

Last post by boteh35959
Mon Apr 20, 2026 9:01 am
Does anyone here have a 4 inch cannon and wants some free prototype shells?

Last post by JimmyT « Wed Mar 25, 2026 2:29 am
Posted in General Cannon Discussion

by JimmyT » Wed Mar 25, 2026 2:29 am » in General Cannon Discussion

I recently got a 4 footer of 1 inch allthread rod, and I intend to use it for the good of mankind. (I'm going to be making some big ass sabot rounds...

0 Replies

8916 Views

Last post by JimmyT
Wed Mar 25, 2026 2:29 am
Semi auto airgun conversion project

Last post by Sarnento « Sun Jan 18, 2026 7:02 pm
Posted in BB, Airsoft, and Pellet Guns

by Sarnento » Sun Jan 18, 2026 7:02 pm » in BB, Airsoft, and Pellet Guns

Recently got into additive manufacturing, and thought about the possibility of something like a conversion from bolt action to semi auto could be...

0 Replies

45006 Views

Last post by Sarnento
Sun Jan 18, 2026 7:02 pm
Pneumatic cannon not firing consistently – help needed

Last post by Driftboss3d « Tue Nov 11, 2025 9:17 pm
Posted in Combustion Cannons

by Driftboss3d » Tue Nov 11, 2025 9:17 pm » in Combustion Cannons

Hi everyone,
I’ve been building a pneumatic cannon using 2 PVC, a 120 psi compressor, and a quick-connect valve, but I’m having an issue: the spud is...

0 Replies

39539 Views

Last post by Driftboss3d
Tue Nov 11, 2025 9:17 pm
Anyone use theirs as a frozen bait launcher?

Last post by Broylz « Sat Jul 05, 2025 4:10 pm
Posted in Pneumatic Cannons

by Broylz » Sat Jul 05, 2025 4:10 pm » in Pneumatic Cannons

I have recently completed my first build with a 4” pic chamber of 48” reduced down to 2” and then down again to 1.5” with a pair of street elbows to...

0 Replies

123274 Views

Last post by Broylz
Sat Jul 05, 2025 4:10 pm
Where do I fire this thing?

Last post by CraigRepublic « Tue Apr 01, 2025 6:51 pm
Posted in Combustion Cannons

by CraigRepublic » Tue Apr 01, 2025 6:51 pm » in Combustion Cannons

Hello! This is my first time posting and first time building a potato cannon. Im very confused on where I can fire this thing.

I know that most of...

0 Replies

73351 Views

Last post by CraigRepublic
Tue Apr 01, 2025 6:51 pm
Bell Reducer or Flush Hub Bushing

Last post by mick04u « Thu Mar 20, 2025 12:25 pm
Posted in Combustion Cannons

by mick04u » Thu Mar 20, 2025 12:25 pm » in Combustion Cannons

Hello, I’m building a potato gun with a 4” combustion chamber and a 2” barrel. What would be a stronger transition from the 4” to 2” pipe, a bell...

0 Replies

76999 Views

Last post by mick04u
Thu Mar 20, 2025 12:25 pm
making a can cannon

Last post by ksg « Wed Dec 18, 2024 4:19 pm
Posted in Combustion Cannons

by ksg » Wed Dec 18, 2024 4:19 pm » in Combustion Cannons

i want to make a tri-barrel launcher that can shoot cans out of it. the goal i want with this is to be able to shoot the can alwhile holding intact...

0 Replies

66388 Views

Last post by ksg
Wed Dec 18, 2024 4:19 pm
3d printed QEV

Last post by Laser diode « Tue Dec 17, 2024 4:01 pm
Posted in Pneumatic Cannons

by Laser diode » Tue Dec 17, 2024 4:01 pm » in Pneumatic Cannons

I had an aluminum qev that worked great but I noticed many things about it that could be improved so I decided to try to make one myself. At first I...

0 Replies

114377 Views

Last post by Laser diode
Tue Dec 17, 2024 4:01 pm
Pneumatic System Using 1/4 Inch Steel Balls

Last post by byron555 « Sun Dec 15, 2024 8:45 pm
Posted in Pneumatic Cannons

by byron555 » Sun Dec 15, 2024 8:45 pm » in Pneumatic Cannons

Hello, I own a 1/4 inch slide valve set combined with a QEV and would like to build or find an optimized semi-automatic loader to use with 1/4 inch...

0 Replies

114869 Views

Last post by byron555
Sun Dec 15, 2024 8:45 pm
Confused about stepper motors

Last post by Selma « Fri Dec 13, 2024 2:03 am
Posted in General Cannon Discussion

by Selma » Fri Dec 13, 2024 2:03 am » in General Cannon Discussion

How do I connect a stepper motor to a circuit board. I'm very new to this and need a little help.

I have a k8055 and a hybrid stepper motor, size 11...

0 Replies

111495 Views

Last post by Selma
Fri Dec 13, 2024 2:03 am
Pneumatic System Using 1/4 Inch Steel Balls

Last post by byron555 « Mon Dec 09, 2024 8:45 pm
Posted in Pneumatic Cannons

by byron555 » Mon Dec 09, 2024 8:45 pm » in Pneumatic Cannons

Hello, I own a 1/4 inch slide valve set combined with a QEV and would like to build or find an optimized semi-automatic loader to use with 1/4 inch...

0 Replies

114545 Views

Last post by byron555
Mon Dec 09, 2024 8:45 pm
Pneumatic System Using 1/4 Inch Steel Balls

Last post by byron555 « Sun Dec 08, 2024 8:56 pm
Posted in Pneumatic Cannons

by byron555 » Sun Dec 08, 2024 8:56 pm » in Pneumatic Cannons

Hello, I own a 1/4 inch slide valve set combined with a QEV and would like to build or find an optimized semi-automatic loader to use with 1/4 inch...

0 Replies

114863 Views

Last post by byron555
Sun Dec 08, 2024 8:56 pm
Making a Snow Cannon

Last post by byron555 « Fri Dec 06, 2024 5:33 am
Posted in Pneumatic Cannons

by byron555 » Fri Dec 06, 2024 5:33 am » in Pneumatic Cannons

Hello, this year I want to make the traditional snowball fights more interesting and exciting this winter by making a snow cannon that can launch...

0 Replies

110264 Views

Last post by byron555
Fri Dec 06, 2024 5:33 am
Vintage cap gun to potato gun conversion...

Last post by musket « Wed Dec 04, 2024 10:16 pm
Posted in Miniature Cannons

by musket » Wed Dec 04, 2024 10:16 pm » in Miniature Cannons

Hello all...my first post! So....I have a long barrell musket/rifle cap gun I want to make shoot potato. It's made of metal and wood. My thought is...

0 Replies

109326 Views

Last post by musket
Wed Dec 04, 2024 10:16 pm
Can someone help me build a tennis ball Launcher

Last post by Opob « Sun Nov 03, 2024 1:51 pm
Posted in General Cannon Discussion

by Opob » Sun Nov 03, 2024 1:51 pm » in General Cannon Discussion

Im a complete noobie and ive tried looking around and cant find something in good detail about how to make something.I tried looking through the wiki...

0 Replies

112854 Views

Last post by Opob
Sun Nov 03, 2024 1:51 pm
QDV Piston leak question

Last post by Pro « Tue Oct 29, 2024 4:47 pm
Posted in Pneumatic Cannons

by Pro » Tue Oct 29, 2024 4:47 pm » in Pneumatic Cannons

Regarding the famous QDV valve as outlined in this video:

There is one thing I am not understanding.
Once the rod is retracted and the piston...

0 Replies

94217 Views

Last post by Pro
Tue Oct 29, 2024 4:47 pm
Trying to get better power and range out of my tennis ball launcher

Last post by ColtD « Tue Oct 22, 2024 4:38 pm
Posted in Pneumatic Cannons

by ColtD » Tue Oct 22, 2024 4:38 pm » in Pneumatic Cannons

Joined cause im a bit stuck in my design/testing of my launcher and hoping i can get some ideas to add velocity and power to my projectiles. Im...

0 Replies

94516 Views

Last post by ColtD
Tue Oct 22, 2024 4:38 pm
High mixture hybrid gun "fuel cartridges" proposal

Last post by YBCO666 « Mon Oct 21, 2024 1:05 am
Posted in Hybrid Cannons

by YBCO666 » Mon Oct 21, 2024 1:05 am » in Hybrid Cannons

Well, I don't have the money, or the equipment, or the room to make a hybrid gun (100x+ mixture), the best I could do is make the 3D plans and see if...

0 Replies

112889 Views

Last post by YBCO666
Mon Oct 21, 2024 1:05 am
GAW 770 by Grégory

Last post by Turbine32 « Wed Sep 11, 2024 3:30 am
Posted in Hybrid Cannons

by Turbine32 » Wed Sep 11, 2024 3:30 am » in Hybrid Cannons

Bonjour à tous je suis français et en France pas beaucoup de monde ose les choses... Mais moi je le fais !
Pour continuer à faire vivre nôtre plaisir...

0 Replies

110779 Views

Last post by Turbine32
Wed Sep 11, 2024 3:30 am
Newbie builder, need some help on a school project

Last post by Potatolauncher424 « Sat Sep 07, 2024 9:06 pm
Posted in General Cannon Discussion

by Potatolauncher424 » Sat Sep 07, 2024 9:06 pm » in General Cannon Discussion

Hey potato launchers! (or whatever y'all call each other! XD) I've been researching for a potato gun project at school and need some help. I can't...

0 Replies

109847 Views

Last post by Potatolauncher424
Sat Sep 07, 2024 9:06 pm
School project potato cannon

Last post by Techexical « Wed Aug 28, 2024 11:58 pm
Posted in Combustion Cannons

by Techexical » Wed Aug 28, 2024 11:58 pm » in Combustion Cannons

Hey all, I am building a combustion potato cannon for a school project, a 1.5 inch ABS pipe based cannon (I know, pretty risky seeing how people see...

0 Replies

111352 Views

Last post by Techexical
Wed Aug 28, 2024 11:58 pm
Gregazzgun 770

Last post by Turbine32 « Mon Aug 05, 2024 12:03 pm
Posted in Hybrid Cannons

by Turbine32 » Mon Aug 05, 2024 12:03 pm » in Hybrid Cannons

Bonjour à tous je crée ce poste (je suis français) pour participer à continuer de donner vie au forum...
J'ai toujours aimé construire des choses...

0 Replies

109266 Views

Last post by Turbine32
Mon Aug 05, 2024 12:03 pm

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