Fluidizing the flask is more useful for extracting (and possibly placing the pattern) the casting but actually does the oppoite of what you want to do to pack the flask. I think you'd be far better off sticking with your vibe table for packing lost foam flasks. Multiaxis vibe is the commercial process for packing, not fluidizing. Best, Kelly
Quick thought on DC Power supply for your 100V DC motor... A fair number of PC power supplies (eg. ATX) have a bridge rectifier on the input that will give you +60V out (very noisy, but you're driving a motor -- not sensitive electronics). If you tap into that voltage, it would probably be enough to run your shaker motor. (You could also just buy an inexpensive bridge rectifier from DigiKey.) It's not the most efficient way to run your motor below the rated voltage (definitely not optimal), but the efficiency losses are cheap compared to an expensive supply. More generally: Get yourself a good desktop power supply. You'll be glad you have one!
I found the power supply last week so kind of a moot point now. I didn't want to straight bridge rectifier it on account of hitting it with full peak 170V. My hack power supply is two 24V transformers in series followed by a rectifier...might have a cap in their iirc. It puts out about 80-90ish volts DC. I have a budget variable bench supply, but it only goes up to 30V. If you have one your recommend let me know. I expect to do some power electronics starting after the shaper project.
I think the vibratory table is better... the fuildizing seems to not be active on 100% of the sand... whereas the vibratory system acts on 100% of the sand around the foam.... but another thought... why not find an air motor and attach that instead of the electric one?
+Brian Prusa wow! That's a cool video. Takeaways: flip my injector over so it doesn't get sand in the tube, and i need a sealed container so the sand doesnt flow out the bottom or holes.
Update: I found the power supply it was right at the front of the storage unit...
sweetness. I love playing in fluidized beds of sand!
I bet you do. Collab? :)
LOL sounds like fun!
Fluidizing the flask is more useful for extracting (and possibly placing the pattern) the casting but actually does the oppoite of what you want to do to pack the flask. I think you'd be far better off sticking with your vibe table for packing lost foam flasks. Multiaxis vibe is the commercial process for packing, not fluidizing. Best, Kelly
That earned a subscription. Nice channel.
Dude, come back again!
Quick thought on DC Power supply for your 100V DC motor... A fair number of PC power supplies (eg. ATX) have a bridge rectifier on the input that will give you +60V out (very noisy, but you're driving a motor -- not sensitive electronics). If you tap into that voltage, it would probably be enough to run your shaker motor. (You could also just buy an inexpensive bridge rectifier from DigiKey.) It's not the most efficient way to run your motor below the rated voltage (definitely not optimal), but the efficiency losses are cheap compared to an expensive supply. More generally: Get yourself a good desktop power supply. You'll be glad you have one!
I found the power supply last week so kind of a moot point now. I didn't want to straight bridge rectifier it on account of hitting it with full peak 170V. My hack power supply is two 24V transformers in series followed by a rectifier...might have a cap in their iirc. It puts out about 80-90ish volts DC. I have a budget variable bench supply, but it only goes up to 30V. If you have one your recommend let me know. I expect to do some power electronics starting after the shaper project.
Is there any way to make lost foam castings without porosity? So far all I've seen have lots of pores inside the casting :(
very interesting!! you're an artist :D
Great video!!!
Very interesting man! You'r video always are 👍
I think the vibratory table is better... the fuildizing seems to not be active on 100% of the sand... whereas the vibratory system acts on 100% of the sand around the foam.... but another thought... why not find an air motor and attach that instead of the electric one?
Ramiro M agreed vibratory table is better. I have never used air motors much. I could maybe repurpose a die grinder. What is a good source?
as long as it vibrates the table... and the die grinder is free I say go for it.
Check out the video mark rober just did. Lots of good fluidizing tips.
+Brian Prusa wow! That's a cool video. Takeaways: flip my injector over so it doesn't get sand in the tube, and i need a sealed container so the sand doesnt flow out the bottom or holes.