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  • dmoreaux commented on MarcusW44's instructable Build a 3D Printed Curta Calculator3 months ago
    Build a 3D Printed Curta Calculator

    This is really an awesome work... Lots of planning/modelling and lots of printing time...

    1) What plastic did you use ? PLA ? ABS ? PTFE ? Other ?2) most printers only have 20cm height (or a little less) but 20x20 or more for the HB... is that 22cm height buildsize really needed (can the model be tweaked to avoid it ?)3) if printer support multiple materials, would it be better to use if for soluble supports or to have different filament color for the result wheel, the outer box and the input wheels ?

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  • dmoreaux followed MarcusW443 months ago
      • Build a 3D Printed Curta Calculator
  • Fighter Robot Gizmo | Robowars | Battlebot

    For the flamethrower, you should have used HV instead of the piezzo element plus a servo...You can see cheap ready to use high power generators with the added benefit that you may generate continuous sparks until gaz has caught flame.Example, on bang good, you find some modules that can get from 3,7 to 6V power to generate 400kV at the exit. A simple LiPo element gives enough power...Also, I don't like the servo used to open the can valve... should your robot get out of power (or it's electronic fried), the flamethrower could get locked on... which is very bad... it's about battling robots, anything can happen...Also for safety, you should make sure that gaz can't accumulate in the robot (have exhaust event + separate insulated compartiment for the gaz can)... Motors may generate spa...

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    For the flamethrower, you should have used HV instead of the piezzo element plus a servo...You can see cheap ready to use high power generators with the added benefit that you may generate continuous sparks until gaz has caught flame.Example, on bang good, you find some modules that can get from 3,7 to 6V power to generate 400kV at the exit. A simple LiPo element gives enough power...Also, I don't like the servo used to open the can valve... should your robot get out of power (or it's electronic fried), the flamethrower could get locked on... which is very bad... it's about battling robots, anything can happen...Also for safety, you should make sure that gaz can't accumulate in the robot (have exhaust event + separate insulated compartiment for the gaz can)... Motors may generate sparks, if gaz is accumulated around it, it may make the robot explode...Also, make sure that the pipes from the can to the thrower are heat resistant... not to protect against your flame but to protect against another robot's flamethrower which could melt the pipe and make your robot explode at next attempt to use flamethrower.

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