I'm rebuilding my robot onto a new chassis made of Openbeam.
One of the main differences will be the drive system: Instead of a direct drive system, I would like to use a 3:1 Timing Belt system and new 8 Inch wheels.
I don't have much experience with this sort of stuff and I'm not sure what Pulleys and Belts i need. If someone could help out, it would be greatly appreciated. :)
On Saturday, November 17, 2012 12:09:17 AM UTC+11, Alex McClung wrote:
> Hi Guys,
> I'm rebuilding my robot onto a new chassis made of Openbeam.
> One of the main differences will be the drive system: > Instead of a direct drive system, I would like to use a 3:1 Timing Belt > system and new 8 Inch wheels.
> I don't have much experience with this sort of stuff and I'm not sure what > Pulleys and Belts i need. > If someone could help out, it would be greatly appreciated. :)
> Cheers, > Alex
Alex, given the size of wheel I would recommend XL timing pulleys. XL is 5.08mm pitch. There is a metric version T5, but choices can be more limited for one-off constructions.
Stock Drive Products sell timing pulleys and belts in most configurations, they also have a centre didtance calculator for determining the distance between the pulleys (note it is not entirely accurate and I tend to check the true distance once I receive the parts, but you will be within a few millimetres). Their website is: http://www.sdp-si.com
They sell plastic pulleys which are very cheap and nice to work with and you can buy a pulley with hub and set screw with the correct bore to fit the Jaycar motors off the shelf.
If you're going to be down at the workshop any time soon, I have my new base on the back table, it uses an XL belt system to bring the speed down to around 80cm/sec and improve the torque.
I am using a pnuematic wheel from Fallshaw casters as the hub is bolted together and I was able to use those bolts and some couplers to attach the large timing pulley and keep everything square. I also printed a template on the 3D printer for drilling the holes in the pulley so they match up exactly with the bolt holes in the wheel.
Thanks Dave, Ive looked on their website, but i'm not sure exactly what i need. They have hundreds of configurations and i want to make sure it will work before i purchase.
They don't have any 8mm Bore, XL Pulleys with anywhere close to the 60 grooves.
On Saturday, 17 November 2012 18:27:40 UTC+11, Dave Everett wrote:
> On Saturday, November 17, 2012 12:09:17 AM UTC+11, Alex McClung wrote:
>> Hi Guys,
>> I'm rebuilding my robot onto a new chassis made of Openbeam.
>> One of the main differences will be the drive system: >> Instead of a direct drive system, I would like to use a 3:1 Timing Belt >> system and new 8 Inch wheels.
>> I don't have much experience with this sort of stuff and I'm not sure >> what Pulleys and Belts i need. >> If someone could help out, it would be greatly appreciated. :)
>> Cheers, >> Alex
> Alex, given the size of wheel I would recommend XL timing pulleys. XL is > 5.08mm pitch. There is a metric version T5, but choices can be more limited > for one-off constructions.
> Stock Drive Products sell timing pulleys and belts in most configurations, > they also have a centre didtance calculator for determining the distance > between the pulleys (note it is not entirely accurate and I tend to check > the true distance once I receive the parts, but you will be within a few > millimetres). Their website is: > http://www.sdp-si.com
> They sell plastic pulleys which are very cheap and nice to work with and > you can buy a pulley with hub and set screw with the correct bore to fit > the Jaycar motors off the shelf.
> If you're going to be down at the workshop any time soon, I have my new > base on the back table, it uses an XL belt system to bring the speed down > to around 80cm/sec and improve the torque.
> I am using a pnuematic wheel from Fallshaw casters as the hub is bolted > together and I was able to use those bolts and some couplers to attach the > large timing pulley and keep everything square. I also printed a template > on the 3D printer for drilling the holes in the pulley so they match up > exactly with the bolt holes in the wheel.
From: sydney-hackspace@googlegroups.com
[mailto:sydney-hackspace@googlegroups.com] On Behalf Of Alex McClung
Sent: Saturday, 17 November 2012 8:40 PM
To: sydney-hackspace@googlegroups.com
Subject: Re: Drive Components for my Robot.
Thanks Dave,
Ive looked on their website, but i'm not sure exactly what i need. They
have hundreds of configurations and i want to make sure it will work
before i purchase.
They don't have any 8mm Bore, XL Pulleys with anywhere close to the 60
grooves.
I don't have much experience with this sort of stuff and I'm not sure
what Pulleys and Belts i need.
If someone could help out, it would be greatly appreciated. :)
Cheers,
Alex
Alex, given the size of wheel I would recommend XL timing pulleys. XL is
5.08mm pitch. There is a metric version T5, but choices can be more
limited for one-off constructions.
Stock Drive Products sell timing pulleys and belts in most
configurations, they also have a centre didtance calculator for
determining the distance between the pulleys (note it is not entirely
accurate and I tend to check the true distance once I receive the parts,
but you will be within a few millimetres). Their website is:
They sell plastic pulleys which are very cheap and nice to work with and
you can buy a pulley with hub and set screw with the correct bore to fit
the Jaycar motors off the shelf.
If you're going to be down at the workshop any time soon, I have my new
base on the back table, it uses an XL belt system to bring the speed
down to around 80cm/sec and improve the torque.
I am using a pnuematic wheel from Fallshaw casters as the hub is bolted
together and I was able to use those bolts and some couplers to attach
the large timing pulley and keep everything square. I also printed a
template on the 3D printer for drilling the holes in the pulley so they
match up exactly with the bolt holes in the wheel.
Dave
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Hey guys, I'm working on a simple project. I bought a spy pen camera, and using its electronics, I want to link it to a piece of glass (size of normal spectacles). Got inspired by google glasses, so wanted to replicate it. Does anyone have any idea how to link the 2 components together.
ThanksMing
On Tue, Nov 20, 2012 at 4:48 PM, Ming Yu <kmyj1...@hotmail.com> wrote:
> Hey guys,
> I'm working on a simple project. I bought a spy pen camera, and using its
> electronics, I want to link it to a piece of glass (size of normal
> spectacles). Got inspired by google glasses, so wanted to replicate it.
> Does anyone have any idea how to link the 2 components together.
Google have a lot of money to put into their projects. Stuff that
'looks-easy' ain't always
that easy to project manage and make.
Why not post a picture of the parts that you have so far so we can comment
from
there.
Need more information to be able to tell you what to connect where to where.
On Saturday, November 17, 2012 8:39:58 PM UTC+11, Alex McClung wrote:
> Thanks Dave, > Ive looked on their website, but i'm not sure exactly what i need. They > have hundreds of configurations and i want to make sure it will work before > i purchase.
> They don't have any 8mm Bore, XL Pulleys with anywhere close to the 60 > grooves.
T5 is fine, it's almost the same as XL, so T5 pulleys and T5 belts would do the job fine.
Kean, good resource there, those prices are very good.
I checked up my last order, on those pnuematic wheels I used a 70 tooth pulley and a 20 tooth on the motor to get the speed and torque where I wanted them. If you got the 60 tooth for the wheel and the 15 tooth for the motor, you would get a similar ratio. The 15 tooth has a 6mm bore so will fit exactly on the Jaycar motor. The other pulley, you bore out the centre of.
You'll want to check that the 70 tooth pulley has enough space to place the screws to interface with the screws in the wheel (that is the bolt circle can be accommodated in the pulley). That may not be clear so I'll post a drawing. As you can see, the screws that hold the pulley to the wheel must fit within the pulley itself. I used standard M6 couplwers to attach it to the wheel.
Either way I would say ausxmods is the go, I'll be getting stuff from them in the future as I would prefer to buy locally.
Ive already purchaced a 20:60 tooth system of sdp-si.com, it looks like i have to make up a custom hub.
Two questions: 1. I ordered the 60 tooth Pulleys without flanges, will this be a big problem? 2. Will 120mm be long enough between the origins of the pulleys?
I dont have the parts yet because I still not too sure what is needed. But just want to find out if it is even possible to use a glass screen and link it to a camera. Is there such a screen and if so whats it called.
thanks
Date: Tue, 20 Nov 2012 17:37:16 +1100
Subject: Re: Want to take spy pen camera electronics and hook up to a mini monitor
From: david.lyon.preissh...@gmail.com
To: sydney-hackspace@googlegroups.com
On Tue, Nov 20, 2012 at 4:48 PM, Ming Yu <kmyj1...@hotmail.com> wrote:
Hey guys, I'm working on a simple project. I bought a spy pen camera, and using its electronics, I want to link it to a piece of glass (size of normal spectacles). Got inspired by google glasses, so wanted to replicate it. Does anyone have any idea how to link the 2 components together.
Google have a lot of money to put into their projects. Stuff that 'looks-easy' ain't always
that easy to project manage and make.
Why not post a picture of the parts that you have so far so we can comment from
there.
Need more information to be able to tell you what to connect where to where.
--
You received this message because you are subscribed to the Google Groups "Robots & Dinosaurs" group.
To post to this group, send email to sydney-hackspace@googlegroups.com.
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What you want is a head-mounted display (HMD). If you also want to see
through the display (have the image overlaid on the background) you need a
transmissive (? transparent?) HMD. These are not cheap.
I imagine what you want to do is have the camera transmit an image to your
glasses. Look at RC aircraft FPV systems (eg. FatShark) to see what is
involved with this.
On 21 November 2012 22:44, Ming Yu <kmyj1...@hotmail.com> wrote:
> I dont have the parts yet because I still not too sure what is needed.
> But just want to find out if it is even possible to use a glass screen and
> link it to a camera.
> Is there such a screen and if so whats it called.
> thanks
> ------------------------------
> Date: Tue, 20 Nov 2012 17:37:16 +1100
> Subject: Re: Want to take spy pen camera electronics and hook up to a mini
> monitor
> From: david.lyon.preissh...@gmail.com
> To: sydney-hackspace@googlegroups.com
> On Tue, Nov 20, 2012 at 4:48 PM, Ming Yu <kmyj1...@hotmail.com> wrote:
> Hey guys,
> I'm working on a simple project. I bought a spy pen camera, and using its
> electronics, I want to link it to a piece of glass (size of normal
> spectacles). Got inspired by google glasses, so wanted to replicate it.
> Does anyone have any idea how to link the 2 components together.
> Google have a lot of money to put into their projects. Stuff that
> 'looks-easy' ain't always
> that easy to project manage and make.
> Why not post a picture of the parts that you have so far so we can comment
> from
> there.
> Need more information to be able to tell you what to connect where to
> where.
> --
> You received this message because you are subscribed to the Google Groups
> "Robots & Dinosaurs" group.
> To post to this group, send email to sydney-hackspace@googlegroups.com.
> To unsubscribe from this group, send email to
> sydney-hackspace+unsubscribe@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/sydney-hackspace?hl=en.
> --
> You received this message because you are subscribed to the Google Groups
> "Robots & Dinosaurs" group.
> To post to this group, send email to sydney-hackspace@googlegroups.com.
> To unsubscribe from this group, send email to
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> For more options, visit this group at
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On Wed, Nov 21, 2012 at 10:44 PM, Ming Yu <kmyj1...@hotmail.com> wrote:
> I dont have the parts yet because I still not too sure what is needed.
> But just want to find out if it is even possible to use a glass screen and
> link it to a camera.
> Is there such a screen and if so whats it called.
On Tuesday, November 20, 2012 9:28:09 PM UTC+11, Alex McClung wrote:
> Thanks Dave,
> Ive already purchaced a 20:60 tooth system of sdp-si.com, it looks like i > have to make up a custom hub.
> Two questions: > 1. I ordered the 60 tooth Pulleys without flanges, will this be a big > problem?
No, as the 20 tooth has flanges it will keep the belt square. My original setup had no flanges on the large pulley.
> 2. Will 120mm be long enough between the origins of the pulleys?
That's plenty, I think I only have 100mm between centres. However don't place anything until you get the gear, that will allow you to have the best tension and least play in the system.
On Thursday, 22 November 2012 20:02:49 UTC+11, Dave Everett wrote:
> On Tuesday, November 20, 2012 9:28:09 PM UTC+11, Alex McClung wrote:
>> Thanks Dave,
>> Ive already purchaced a 20:60 tooth system of sdp-si.com, it looks like >> i have to make up a custom hub.
>> Two questions: >> 1. I ordered the 60 tooth Pulleys without flanges, will this be a big >> problem?
> No, as the 20 tooth has flanges it will keep the belt square. My original > setup had no flanges on the large pulley.
>> 2. Will 120mm be long enough between the origins of the pulleys?
> That's plenty, I think I only have 100mm between centres. However don't > place anything until you get the gear, that will allow you to have the best > tension and least play in the system.
