The thing is I have already finished the head section about a year ago, finger lights and all. The brain cup I used was a plastic one and now I decided to upgrade to a Norm S. aluminium one. Unfortunately this means I have to pull the whole thing apart and rebuild it. I'm sure it will be worth it. It wont be the first thing I've done more than once.... Damn this OCD
Steve
On Saturday, 23 January 2016, 22:34, "Gregorio Padin padingre@yahoo.com [B9Builders]" wrote:
No worries on my end
a reply is better than no replie .Perhaps you can share pictures and / or video of the assembly of the light fingers. Once I get my items I plan on doing one and sharing. As long as I dont forget lol...
Thanks for all the advise guys, oh and sorry for the late reply
Steve
On Thursday, 21 January 2016, 12:37, "Craig Reinbrecht craig@bex.net [B9Builders]" wrote:
For the cam push rods, Mike Joyce used 1/8" x 1 1/8" Stainless Steel dowel pins that have slightly beveled ends. McMaser-Carr Part# 90145A882. These will work with the Norman Brain Cups and cams. Delrin, which the cams are made from, is a very dense and sturdy material. It has a naturally slick surface which makes it excellent for moving parts such as this. I am certain Mike felt that wear would not be an issue with the Stainless Steel push rods. I do think rounding the ends and polishing to a very smooth finish would be a good idea.
For my own robot I used 1/4" Delrin rod, and rounded over the cam ends. Delrin is very dense, and naturally "slippery" material which makes it a great solution for moving parts like this. My Brain Cup is an early version with 1/4" push rod holes (as apposed to Norman's 1/8"). My cam is made of resin with embedded graphite.
Craig
At 06:38 AM 1/20/2016, you wrote:
Good morning!
Sorry for being off the grid but I should be back in a few weeks.
I did want to share the following, an empty pen if taken apart has where the ink goes in. I took a Pilot pen and cut it but not knowing the lenght needed, I let it fall through the hole to hit bottom an cut it flat to the surface.
Considering the force, it should never buckle and it is hallow in case you ever need that forr anything such as to add weight or reinforce. David aka Toblueis
If you place a LED, remember the straw is hollow and you could try to power the LED Pimp my B9 lol.
Metal rods could be ok but it is stronger than the cam and the material of the finger so over time it should wear or show sign.
I am waiting to get my "fingers" to test it out. If you look at the solution presented it is a puece of engineering that is today cheap or free and we recycle.
Enjoy!
I was wondering if someone can suggest what to use for the finger light push rods. I have a Norm S. brain cup and cam. The push rod holes are 3mm. Also what is done to prevent damade to the cam contact surface?
Steve
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