Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 43 users online :: 4 registered, 0 hidden and 39 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

The Offcial Machinist Thread: Revised 01/04/2014

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Unread postAuthor: jackssmirkingrevenge » Sat May 04, 2013 9:50 am

A quickie while I'm at it, delrin piston for DaxSF
  • 0

Attachments
piston.JPG
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: jakethebeast » Sat May 04, 2013 12:33 pm

Wyz tell me how it works. If its good id like to test one :P
  • 0

Est Sularus Oth Mithas
User avatar
jakethebeast
Brigadier General
Brigadier General
 
Posts: 934
Joined: Sat Jul 03, 2010 4:20 pm
Location: Jakes cave
Country: Finland (fi)
Reputation: 11

Unread postAuthor: wyz2285 » Sat May 04, 2013 12:46 pm

Sure thing, but I don't have a decibel meter or chrony. :(
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: jakethebeast » Sat May 04, 2013 5:22 pm

Record shot with and without it. Then ill do the smae. We should get a comparison. I mean ill do it with the baffles i have
  • 0

Est Sularus Oth Mithas
User avatar
jakethebeast
Brigadier General
Brigadier General
 
Posts: 934
Joined: Sat Jul 03, 2010 4:20 pm
Location: Jakes cave
Country: Finland (fi)
Reputation: 11

Unread postAuthor: wyz2285 » Sat May 04, 2013 5:34 pm

I'll use audacity then, as soon as the parts arrives :)
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Labtecpower » Wed May 29, 2013 5:57 am

I hate school..

Image

I was turning this axle at school, needed to have a h6 tolerance.
Turned it down to 28mm, and measured it. At the tailstock it was .4 mm smaller than at the chuck..
Adjusting the tailstock had no significant effect, after a few adjustments I was still left with a 0.1 mm difference, and a 0.09 mm bulge in the middle.

I've done a lot of work on this lathe, and never had problems with it. I suspect one of my fellow students raped it.. It's a shame to see perfectly good 50-year old lathes being treated this way :roll:


On the other hand, they have some nice measuring tools from the USSR :D

Image
  • 0

"ñøw mÿ šįg šüçkś!"
User avatar
Labtecpower
Major General
Major General
 
Posts: 1267
Joined: Sat Feb 20, 2010 6:38 am
Location: Herb Island
Reputation: 7

Unread postAuthor: jackssmirkingrevenge » Wed May 29, 2013 6:14 am

*fap fap fap* nice toy you have to play with!

wyz2285 wrote:I'll use audacity then, as soon as the parts arrives :)


Did you get the parts after all?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Sponsored

Sponsor
 


Unread postAuthor: Crna Legija » Wed May 29, 2013 6:49 am

we don't have the guard on lathes at trade school, we have them at work but most of them have been tweaked slightly! :wink:

but we do have the same problem with machine quality, first then the instructor taught us was to check the machine trueness. some of our ones at 5 turns for play in the top slide! getting 3 new ones next year! these bad boys
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: jrrdw » Wed May 29, 2013 7:21 am

Sloppy live center .0001 out from .0004 standard over 100 or so hours of use... 50 year old lathe, bed warpage. Does the carriage grab a snug spot in it's travel in the length of the bed?
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6539
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: Labtecpower » Wed May 29, 2013 7:47 am

we don't have the guard on lathes at trade school, we have them at work but most of them have been tweaked slightly! :wink:


I hate them when working on small workpieces.. But after i've seen some pictures of torn off heads I can appreciate them..

At a company I worked for a while we had lathes with a 75 cm chuck, with the chuck jaws extending 15 cm from the outside..
That one had no guard or whatsoever, imagine getting grabbed by that..

Sloppy live center .0001 out from .0004 standard over 100 or so hours of use... 50 year old lathe, bed warpage. Does the carriage grab a snug spot in it's travel in the length of the bed?


Checked the play on the live center.. max 0,01mm.
The carriage runs smoothly all along the bed.
I'm going to take some measurements next week :D
  • 0

"ñøw mÿ šįg šüçkś!"
User avatar
Labtecpower
Major General
Major General
 
Posts: 1267
Joined: Sat Feb 20, 2010 6:38 am
Location: Herb Island
Reputation: 7

Unread postAuthor: jrrdw » Wed May 29, 2013 10:11 am

Checked the play on the live center.. max 0,01mm.
The carriage runs smoothly all along the bed.


May be time to re-polish the gibs. Grime build up (dried oil) can throw off the axes after time.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6539
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: wyz2285 » Wed May 29, 2013 10:48 am

Did you get the parts after all?

Yap, took way more work to install it than I thought through :roll: there were two screws inside I didn't knew about, had to sand a slot.
Worked way better than I thought too :shock: I noticed the effect right on the first shot.
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: jackssmirkingrevenge » Wed May 29, 2013 10:57 am

wyz2285 wrote:Worked way better than I thought too :shock: I noticed the effect right on the first shot.


Excellent, glad to hear it :) see, monocores rule!

Did you do a comparison video? And does it still shoot well?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: wyz2285 » Wed May 29, 2013 11:10 am

Did you do a comparison video?

That's a problem, I don't have any video of it without the internal and now it's stuck there I can't remove it :(
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: jackssmirkingrevenge » Wed May 29, 2013 11:20 am

Oh well, as long as it's better now :)
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

PreviousNext

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'