MechMate CNC Router Forum

Go Back   MechMate CNC Router Forum > Personal Build Histories > MechMates already cutting
Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
  #61  
Old Sun 29 May 2011, 00:07
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Robin, actually I cheated....

I drew a 100mm radius circle in AutoCad and then drew a square inside it. Measured the side length of the square and saw it was 141.4mm...an old familar number related to the sq.root of 2. Then it all fell into place.....

I did always know that the area of a circle inside a square is about 3/4 of the square area, but that it is exactly 3.14/4 (pi/4), so I did have a suspicion there is a linear relationship to pi for square inside the circle.

Last edited by Gerald D; Sun 29 May 2011 at 04:56..
Reply With Quote
  #62  
Old Sat 29 September 2012, 02:29
Quadro
Just call me: Anthony #77
 
South Australia
Australia
Every one else has been designing reduction drives I thought I would have ago.
Mine will be made from cast aluminum and fully enclosed so that I can take advantage of plastic pulleys.
Also I have done away with the laser cut bracket and mounted it to a custom long stud with a large flange to elimiate twisting.
Pictures are of a MDF prototype, the design has slightly changed, they give the general idea.
The image of the reduction on the machine shows it on the wrong side - the reduction housings are universal.
Attached Images
File Type: jpg 27092012(001).jpg (64.7 KB, 251 views)
File Type: jpg 27092012.jpg (58.3 KB, 250 views)
Reply With Quote
  #63  
Old Sat 29 September 2012, 02:50
KenC
Just call me: Ken
 
Klang
Malaysia
Now, that is the right way to do a belt reduction box

It also look like your design can be machine off a block of aluminum
Reply With Quote
  #64  
Old Sat 29 September 2012, 03:01
Khalid
Just call me: khalid
 
Sadiqabad
Pakistan
i like the reduction design. It will be casted very well in Aluminum. Thanks for sharing.
Reply With Quote
  #65  
Old Sat 29 September 2012, 05:09
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Hi Anthony

Must be that time of the year for designing belt reductions .

I like your design, especially the symmetry that makes them universal.
After a few quick calculations I see that 2 x 12 mm plates are never going to make a fully enclosed drive.
Is that why you have chosen casting due to the depth of the assembly?

As an aside if my limited experiences so far with the 4:1 reductions are any thing to go by, you will enjoy having them on your machine.
Just pushing the gantry up the machine when the motors are off is telling me so much more is going on!!

Regards
Ross
Reply With Quote
  #66  
Old Sat 29 September 2012, 05:41
Alan_c
Just call me: Alan (#11)
 
Cape Town (Western Cape)
South Africa
Send a message via Skype™ to Alan_c
Wow! that looks fantastic, I like the closed design.
Reply With Quote
  #67  
Old Sat 29 September 2012, 08:01
Quadro
Just call me: Anthony #77
 
South Australia
Australia
Ross,
I wanted enclosed for dust and swarf.
It had to be light weight for plasma cutter to help acceleration and using a plastic large pulley will help with weight but also rotating inertia.
My aim is to go from 16 mirosteps to 4 mirosteps = more torque + 5.2:1 reduction = more torque. I then maybe able to lower the amperage without sarificing performance(??).

Anthony
Reply With Quote
Reply

Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Making Skins #74 - Brisbane Australia Surfcnc MechMates already cutting 1078 Sun 20 September 2015 11:05
Cutting Letters, Airplane parts and Dinosaurs! #18 - Horsham, Australia Jayson MechMates already cutting 131 Wed 25 April 2012 13:27
south coast.... of Australia southernduckie Introduce yourself and start planning 2 Tue 01 June 2010 07:07
The surfer has a moving & cutting machine - Durban, South Africa reidcd Construction started, but not cutting yet 56 Tue 23 March 2010 03:25
Has been cutting, now for sale - Johannesburg, South Africa linus MechMates already cutting 56 Fri 01 February 2008 03:26


All times are GMT -6. The time now is 03:35.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.