8 inches if I remember correctly? Don't take my word, I'm going off memory. I'll get you some measurements tonight.fedsig2001dc'24' wrote: ↑Tue Oct 29, 2024 10:47 pmhello, I was wondering if anyone knew the diameter of the federal signal model 2 chopper,
This is good stuff to consider.ArxCyberwolf wrote: ↑Sun Nov 03, 2024 1:12 amI would also be wary about trying to make a 3D-printed Model 2 run at full RPM with a chopper of that size out of 3D-printed materials. Model 2s run at over 6000 RPM and that puts a lot of strain on the chopper. There's a reason Federal makes theirs out of aluminum, the material needs to be able to take the repeated stresses without cracking or even detonating. I worry that at that scale the plastic might not hold because it's nowhere as durable as aluminum is. (And on another note, it'd take a huge printer and an obnoxious amount of filament to print a full scale siren like that)
The 2T runs at 5000 RPM, and the regular 2 spins at 6000 I believe.HDN wrote: ↑Mon Nov 04, 2024 2:15 amThis is good stuff to consider.ArxCyberwolf wrote: ↑Sun Nov 03, 2024 1:12 amI would also be wary about trying to make a 3D-printed Model 2 run at full RPM with a chopper of that size out of 3D-printed materials. Model 2s run at over 6000 RPM and that puts a lot of strain on the chopper. There's a reason Federal makes theirs out of aluminum, the material needs to be able to take the repeated stresses without cracking or even detonating. I worry that at that scale the plastic might not hold because it's nowhere as durable as aluminum is. (And on another note, it'd take a huge printer and an obnoxious amount of filament to print a full scale siren like that)
I have an Ender 5 Plus, which has about a cubic foot of printing volume and an insulated enclosure, so I print stuff with ABS or ASA all the time. The bed has a printable area of about 12"x12", so I should be able to print a rotor and stator no problem. A 1mm nozzle would make the printing go faster, but yeah, it would take a lot of filament. It's a pretty big print after all I may have to split up the bigger pieces like the motor stand into chunks. Federal Signal's website says the siren is a little over 2 ft tall with the enclosure.
I didn't know the Model 2 spins at 6000 RPM. I don't think household pedestal fan motors spin anywhere near that fast, and that's what I've considered using. It makes me want to print the thing, put it in a pit outside, and get a 6000 RPM motor for it to see when the printed plastic grenades I guess there's a reason why the thing uses a 2 horsepower motor after all.
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