''drop the block of steel on it, or hit it hard with a large hammer.''
I had a go at it, hammer blows no good -it springs back (almost injuring myself in the process)
The ultimate test: myself standing on it ( now I'm no feather weight at 100kg!) no matter how much I bounced on it, didn't give way. It did get a bit bent though!
I'm really impressed - will surely use it on this build!
Fantastic result! Looked relatively simple to setup, too. May have to try this!
Hmm, what resistance does that wire have?
I fear the 6V battery won't like welding HDPE this way a lot.
But congrats on those tests. I'm impressed.
I don't know the resistance, just used a strand from a cable, its 0.4mm dia copper wire maybe 25cm long. Totally ignored whether the battery likes this or not! I'm not much into electrics and wires, just basic knowledge, so I'll ask my brother if he can rig something, maybe a power supply? Seen him using one to operate the robot motors etc, adjusting voltage and current and so on - so I'll ask him before I fry his battery!
i would make sure the blade is wound in on that plane in the background a couple of pictures back.
it will wear out the blade if left like that.
you can sharpen them on a water stone(if I've not just made that up) or sand paper but i take it you already know that
nice attempt at welding
don't tell me you've noticed the position of the blade from the photo!
had to sharpen it a couple of times while trimming the edges of the robot this week - missed one screw and shaved its head, the blade didn't like it at all! It's really good on hdpe though when sharp.
Btw we use oil stones for sharpening over here, water stone could be something similar but I've never used one.
re. welding I'm happy with the result, makes it easier to attach parts where its difficult to use fasteners, wish I had tried this a bit earlier, it would have spared me a lot of sweat and swearing!
Looks perfect
A small update - Now the machine is almost complete, ready for the event this Sunday.
Testing and last minute modifications still ongoing but the results look promising
Pics and clips will follow after the event - thanks to all those who contributed by giving tips and advice, it was all appreciated!
Liftoff is now almost ready, finishing touches only remaining :P
It had its fair share of last minute problems, specially with the track drive, which insisted it wanted to go off to one side (cutting a nice groove in the HDPE sides), but that's now solved. The flipper arm was also a bit of an issue as we had no stopper installed and when firing the actuator it kept flipping and locking the arm open, That is solved as well.
Got to put the cover in place and get it dressed up for the occasion now :wink:
It is looking really good! I look forward to seeing it tomorrow as I am currently in Malta and bringing my spinner Inertia XL to demonstrate
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