MechMate CNC Router Forum

Go Back   MechMate CNC Router Forum > Structure & Mechanics > 40. Z-Slide
Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
  #1  
Old Sun 23 May 2010, 05:11
hutchcj
Just call me: Colin
 
Sydney
Australia
Spider plate - 194mm wide and 4mm thick

I've got the laser cut parts for my MechMate and I had a quick look at the spider plate. It's only 194mm wide (should be between 199 and 196mm) and only 4mm thick (should be 5mm). Other than needing large spacers to bridge the 6mm gap to the Y Car, is there an issue with the width and/or the 4mm thickness.

I'll check the rest of the part for tollerence tomorrow.
Reply With Quote
  #2  
Old Sun 23 May 2010, 05:16
AuS MaDDoG
Just call me: Tony #71
 
Brisbane
Australia
Hi Colin,

Should not be too much of a problem, just use spacers between the spider and the car and all should be good.

Cheers
Tony.
Reply With Quote
  #3  
Old Sun 23 May 2010, 05:20
hutchcj
Just call me: Colin
 
Sydney
Australia
What about the thickness of 4mm. I was thinking that Gerald originally made it 5mm for a reason. I don't really like the sound of the spider breaking mid cut.
Reply With Quote
  #4  
Old Sun 23 May 2010, 05:25
AuS MaDDoG
Just call me: Tony #71
 
Brisbane
Australia
Colin,

5mm is the prefered check out this thread, http://www.mechmate.com/forums/showthread.php?t=1043

Cheers
Tony.
Reply With Quote
  #5  
Old Sun 23 May 2010, 05:40
rotorzoomer
Just call me: Account - DISABLED
 
Account - DISABLED
Australia
Grrrr

Mine is 4mm thick too

Will need to contact supplier about this; especially being for such a integral part to the build process to be under specification.
Reply With Quote
  #6  
Old Sun 23 May 2010, 06:47
MetalHead
Just call me: Mike
 
Columbiana AL
United States of America
Are you measuring the thickness of the plates with a digital Micrometer?

Any photos? Where are you measuring the thickness?

Does anyone know the tolerance swing on metric plate material thickness?

Let's see some pictures of these spider plates.
Reply With Quote
  #7  
Old Sun 23 May 2010, 07:01
rotorzoomer
Just call me: Account - DISABLED
 
Account - DISABLED
Australia
Spider Thickness

The spider thickness on my batch are 4mm all round measured on all corners, sides, insides e.t.c. It's obvious that it's 4mm material no matter where you measure it.

See pix below...
Attached Images
File Type: jpg spider.jpg (127.1 KB, 479 views)
Reply With Quote
  #8  
Old Sun 23 May 2010, 07:02
hutchcj
Just call me: Colin
 
Sydney
Australia
I haven't measured the thickness with a micrometer yet but I can do that tomorrow. But really I don't see how this is a factor. 1mm is easy to see, even without a ruler.

No photos yet, as I don't have the parts with me. But I could probably upload some tomorrow if you like.

Again, I don't see why it matters where I take a measurement for thickness? If the sheet is 4mm, then it's 4mm all over (except for maybe the bends).
Reply With Quote
  #9  
Old Sun 23 May 2010, 07:04
MetalHead
Just call me: Mike
 
Columbiana AL
United States of America
Yeah I meant not at the bends. It is an easy spot to measure, but just making sure not to measure there.
Reply With Quote
  #10  
Old Sun 23 May 2010, 10:22
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
The plates were originally 4mm thick. Quite a few builders commented on flex issues. I personally did not experience flex, and the builders who commented on flex were asked to measure the flex with a dial gauge. Despite no measured flex values being forthcoming, I decided to err on the side of caution and increase the spider thickness from 4 to 5 mm. That revision was also made to prevent the inch guys from choosing 1/8" inch instead of 3/16".
Reply With Quote
  #11  
Old Sun 23 May 2010, 12:01
hennie
Just call me: Hennie #23
 
Roodepoort JHB
South Africa
My spider plate was cut out of 3 mm steel by accident and up to now had no headaches and I use my MM everyday ( watch my space on Tuesday).
Reply With Quote
  #12  
Old Mon 24 May 2010, 10:44
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
MM #5 had a 3mm steel plate spider and has worked perfectly for years now. That spider is now found a new home on MM #58 as the second z-slide for the MechTorch table at UNCSA. I never noticed any challenges when using the spider. Notably, I had the short stroke slide on #5 with Pre-Mamba parts.

Sean
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
Spider Plate Oh-Oh!! (which # mark to drill on?) SteveE 40. Z-Slide 12 Tue 01 March 2011 09:20
Spider Plate Too Wide? anton 40. Z-Slide 2 Mon 23 November 2009 06:09
Is the MM the right machine for Me? (cutting thin boards and thick foam) 1foamimprovement General - MM Build 5 Wed 18 February 2009 19:24
Check "Spider Plate" 10 40 432 for flatness dmoore 40. Z-Slide 1 Fri 16 May 2008 23:13
Extended Z-axis vibrates - stiffening spider plate Art Archives 21 Mon 14 April 2008 13:59


All times are GMT -6. The time now is 07:31.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.