Nanosumo

[Bill Weiler]

I am making a Nanosumo bot for Robogames, but the wheels are both sticking in a spot. I think it is because they toe-in slightly and are rubbing on the PCB.

I think if I can remove .25mm of PCB I can fix it, but I don't want to damage the wheels. (They are 3D printed ABS with .5mm walls for the pully). I tried fine grit sandpaper and scraping with an xacto but didn't make any progress. I have attached a photo.

Bill W.

[Preston Monroe]

I cant tell how much space you really have to work with. My first thought was a diamond jewelers file or maybe a metal nail file. My wife has a nail file like this and I'm surprised at how corse it is. Might have to cut the tip off to get straight to the good stuff. 

Sent from my iPhone

--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+...@googlegroups.com.
To post to this group, send email to hbrob...@googlegroups.com.
Visit this group at http://groups.google.com/group/hbrobotics?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

<IMG_0458.JPG>

[KM6VV]

You need to use a jeweler file to work the tough Fiberglas. File down,
then use sand paper to finish the edge.

Alan KM6VV

[Bill Weiler]

Where would I get a jewelers file, Michaels?

Bill W.

--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.

To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+unsubscribe@googlegroups.com.

[Butokim]

Sears, orchard supply, lowes, ace, true value, a million places online.

Jim, K6JMG

--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

[KM6VV]

They are often called Swiss Pattern files, or needle file sets.

http://www.mcmaster.com/#swiss-pattern-files/=md27nt

I have sets of 12 files, made by DICK, West Germany.

21011420 5 1/2 " 2 set 1

http://www.dick.de/en/files-and-rasps/precision-files/needle-files/

Alan KM6VV

On 4/17/2013 10:06 AM, Bill Weiler wrote:
> Where would I get a jewelers file, Michaels?
>
> Bill W.
>
> On Wed, Apr 17, 2013 at 9:18 AM, KM6VV <KM...@sbcglobal.net
> <mailto:KM...@sbcglobal.net>> wrote:
>
> You need to use a jeweler file to work the tough Fiberglas. File
> down, then use sand paper to finish the edge.
>
> Alan KM6VV
>
>
> On 4/16/2013 11:10 PM, Bill Weiler wrote:
>
> I am making a Nanosumo bot for Robogames, but the wheels are both
> sticking in a spot. I think it is because they toe-in slightly
> and are
> rubbing on the PCB.
>
> I think if I can remove .25mm of PCB I can fix it, but I don't
> want to
> damage the wheels. (They are 3D printed ABS with .5mm walls for the
> pully). I tried fine grit sandpaper and scraping with an xacto but
> didn't make any progress. I have attached a photo.
>
> Bill W.
>
>
> --
> You received this message because you are subscribed to the Google
> Groups "HomeBrew Robotics Club" group.
> To unsubscribe from this group and stop receiving emails from it,

> send an email to hbrobotics+unsubscribe@__googlegroups.com
> <mailto:hbrobotics%2Bunsu...@googlegroups.com>.

> To post to this group, send email to hbrob...@googlegroups.com

> <mailto:hbrob...@googlegroups.com>.
> Visit this group at
> http://groups.google.com/__group/hbrobotics?hl=en
> <http://groups.google.com/group/hbrobotics?hl=en>.
> For more options, visit https://groups.google.com/__groups/opt_out
> <https://groups.google.com/groups/opt_out>.

>
>
>
> --
> You received this message because you are subscribed to the Google
> Groups "HomeBrew Robotics Club" group.
> To unsubscribe from this group and stop receiving emails from it, send

> an email to hbrobotics+...@googlegroups.com.

[Bill Weiler]

Thanks to everyone who helped me last time. I have a question though. The belts on my robot are slipping. I made the belts out of stretch magic from Michaels, its like stretchable fishing line. I tried dipping the belts in Coke but that didn't work. I also tried getting small rubber bands to no avail (the bands need to be <1mm wide). I called Orthodontists to get the small rubber bands for braces as well as Walgreens and CVS. I have 1 day until Robogames and I am feeling the pressure. Here is a photo. Thanks.

Bill

[Wes Thierry]

have you tried small o rings from an automotive store?  they have many sizes that should fit.....

On Thu, Apr 18, 2013 at 7:38 PM, Bill Weiler <bill...@gmail.com> wrote:

Thanks to everyone who helped me last time. I have a question though. The belts on my robot are slipping. I made the belts out of stretch magic from Michaels, its like stretchable fishing line. I tried dipping the belts in Coke but that didn't work. I also tried getting small rubber bands to no avail (the bands need to be <1mm wide). I called Orthodontists to get the small rubber bands for braces as well as Walgreens and CVS. I have 1 day until Robogames and I am feeling the pressure. Here is a photo. Thanks.

Bill

--

[Bill Weiler]

Wes,

        I bought an o-ring kit from Harbour Freight but the o-rings are too stiff. The belt needs something more flexible.

Bill

[KM6VV]

You couldn't find a small O-ring?

Alan KM6VV

[Wes Thierry]

if you need ortho bands in a short notice, go to the nearest magic shop, they have them usually because they are used with folding coins for putting them in bottles.  tell them you have a folding coin that needs replacement bands, they will know what you need....

On Thu, Apr 18, 2013 at 8:25 PM, KM6VV <KM...@sbcglobal.net> wrote:

You couldn't find a small O-ring?

Alan  KM6VV

On 4/18/2013 7:38 PM, Bill Weiler wrote:

Thanks to everyone who helped me last time. I have a question though. The belts on my robot are slipping. I made the belts out of stretch magic from Michaels, its like stretchable fishing line. I tried dipping the belts in Coke but that didn't work. I also tried getting small rubber bands to no avail (the bands need to be <1mm wide). I called Orthodontists to get the small rubber bands for braces as well as Walgreens and CVS. I have 1 day until Robogames and I am feeling the pressure. Here is a photo. Thanks.

Bill
--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.

To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+unsubscribe@googlegroups.com.

To post to this group, send email to hbrob...@googlegroups.com.
Visit this group at http://groups.google.com/group/hbrobotics?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.

--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.

To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+unsubscribe@googlegroups.com.

[Butokim]

If you are talking about the belts on you wheels that you are using for tread, couldn't you just put a few drops of superglue on them

 

James M. Geidl, K6JMG
D.B. Cooper, you have  a message.
 

---

From: hbrob...@googlegroups.com [mailto:hbrob...@googlegroups.com] On Behalf Of Bill Weiler
Sent: Thursday, April 18, 2013 7:38 PM
To: hbrob...@googlegroups.com
Subject: [HBRobotics] Nanosumo

[KM6VV]

That's a thought. How about the tool-dip plastics they offer? you
could cast a layer on the wheel, and then trim it.

Alan KM6VV

On 4/19/2013 9:20 AM, Butokim wrote:
> If you are talking about the belts on you wheels that you are using for
> tread, couldn't you just put a few drops of superglue on them
>
> James M. Geidl, K6JMG

> /D.B. Cooper, you have a message./
>

[Preston Monroe]

Alan, it's called Plastidip and works pretty well for wheels. Only problem is it does kind of go on chunky. For general purpose it works well but not sure how well it would do for in a competition of traction. Might work though.

http://www.biocow.com/dvdBot/1.JPG
http://www.biocow.com/dvdBot/2.JPG
http://www.biocow.com/dvdBot/3.JPG

[jgeidl]

How about getting a piece of surgical tubing from lowes/homedepot/osh/
etc. of an approriate ID and cut it into sections like calamari
rings. You could cut it whatever width you need. The stuff is really
really flexible so you can get a piece smaller than the wheel diameter
and stretch it. It is also pretty "sticky."

Jim, K6JMG

>  IMG_0459.JPG
> 279KViewDownload

[Bill Weiler]

The surgical tubing idea seems good. I will give it a try.

Bill W.

--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.

To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+...@googlegroups.com.

[KM6VV]

Hi Preston,

Yeah, that's it. I've got a few wheels I'd like to try it on, although
the plan was to cut a groove to match some big O-rings (2.5" dia) for a
floor-bot.

Alan KM6VV

[KM6VV]

Or a bicycle inner-tube. Racing tire tubes might be small enough.

Alan KM6VV

[Bill Weiler]

The robot is functioning, barely. Does anyone know what time competitors can show up tomorrow? The website says noon for spectators, but can competitors show up earlier?

Bill W.

--
You received this message because you are subscribed to the Google Groups "HomeBrew Robotics Club" group.

To unsubscribe from this group and stop receiving emails from it, send an email to hbrobotics+unsubscribe@googlegroups.com.

[Bill Weiler]

I found it on the Robogames site, I can be there at 9am.

Bill W.

[Bill Weiler]

Here is a video of todays Nanosumo. Also a guy's robot catching fire and some lego sumo. I was first up again a watchmaker. It was fun.

http://youtu.be/y8Ld_FO7uSo

Bill W.