Thank you all for your replies!
Quote:
Originally Posted by Mk.32
It looks like the chain would interfere on the cross beans in your design?
And for mounting the gearbox, I would recommend using the KOP hex beams to brace them, or put in another set of bolts to hold it to the chassis.
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Thank you very much, those are some important tips. Here is a quick update:
I looked at team 973's bumper mounts but couldn't find major differences. How would you improve the design?
Quote:
Originally Posted by Cory
What made you choose magnesium?
It's about 40% less dense than aluminum, but it's yield strength is nearly 4 times lower than 6061 and it's ultimate strength is 60% lower.
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We are using magnesium profiles as the main frame component for most of our robot for three years and it does a great work every time. When comparing it to our practice robots, that are usually made from aluminum, the magnesium parts seem to stand in impacts (that you can except for an FRC robot) just as well.
Quote:
Originally Posted by Tristan Lall
Magnesium? Which alloy?
Also, do you take precautions against fire when machining? Magnesium shavings—at least in pure form (I'm not sure about wrought alloys)—are flammable. Most shops wouldn't have a class D fire extinguisher lying around. |
I am not sure which of the alloys we use, but I'll make sure to find out. I do know, however, that this is the same alloy that is used to make the frame for Alubin's bicycles, in case that this gives you some useful information about it.
Magnesium alloy is much more stable than pure magnesium, and is similar to aluminum when machining. However it does require different treatment in some cases.
Thank you for your concern
