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Metalworking

These groups are the best place for discussions about basic metalworking processes such as machining, welding, casting, blacksmithing and other aspects of working with metals.

General Metalworking

Heat pump refrigerant change to R-22 substitute

by Tom Gardner
Is it a good or bad idea to change over to one of the new refrigerants that claim lower head pressure, cooler air and substantially reduced electricity usage? read more »

by Craig 'Lumpy' Lemke
I found a discarded helmet with an S240 lens in it. When I hold it up to the sun it darkens as I'd expect it to but then immediately goes back to being non-darkened. Same happens if I hold it up to w... read more »

Metalworking Craft

Standard-Modern Lathe

by Al
I have a standard-modern lathe model 1334 and would like to ask some questions to someone that owns this lathe. If you own one let me know. Al read more »

Blacksmithing - wrought iron and steel discussions

Anyone one know what this top-tool is used for?

by Curt Welch
http://www.facebook.com/photo.php?fbid=10150823825724317 Phil Heath bought it as part of a collection of old tools but we have never seen a tool like this and haven't yet figured out what it was used... read more »

Metallurgy discussions

Vibrating Screens

by advance dynamic
The design of the Screen - frame which excludes all welding on the sheets in order to eliminate residual tensions, represent an important improvement. For more information :- http://advancedynamics... read more »

Engineering and Science

These forums contain more advanced engineering and science topics, including physics and chemistry.

Electrical Engineering

A few transmission line equipment questions

by avtanski
Hello, I have a few more questions about equipment I've seen on transmission lines. I googled a bit but was not able to confirm my guesses, so I came to you guys. Here are my questions: Q1: Is this ... read more »

Stationary Engines - UK

Petter engine and Manus pump for sale (now with pictures)

by Christopher Tidy
Hi folks, A couple of months ago I advertised a Petter A1 engine and Manus milking set for sale. They're still available, so here's an updated advertisement with pictures. I had always intended to re... read more »

Material Sciences

Screw Conveyors

by advance dynamic
Advance screw conveyors are clean, compact in design, save valuable space, suits restricted space and are easy to install. They are ruggedly built, performance proved, completely dependable and versa... read more »

Mechanical Engineering

Rheolef 6.1: an efficient FEM C++ finite element library for...

by Saramito Pierre
Rheolef: an efficient FEM C++ finite element library for solving PDE Version : 6.1 Book: http://ljk.imag.fr/membres/Pierre.Saramito/rheolef/rheolef.pdf Home: http://ljk.imag.fr/membres/Pierre.Sar... read more »

Polymers Forum

LDPE process question

by Rob Z
I'm using an extrusion of LDPE, 640i. ID .032 Wall .005. I have a process= where I re-flow the extrusion, using a mandrel,FEP heatshrink and hotair. = I have noticed that my pre reflow process tensi... read more »

Computer-Aided Design and Manufacturing

Discussions about CAD/CAM, CNC, 3D modelling and other computer technologies used in design and manufacturing.

General Robotics Forum

evoMUSART 2013: First CFP (with correct dates)

by EvoMUSART
Please distribute (Apologies for cross posting) ---------------------------------------------------------------------------= - CALL FOR PAPERS evomusart 2013 2nd International Conference on Evolution... read more »

Industrial Control Group

Measurement validation for process signals

by Bruce Varley
Struggling with implementing a validation routine for process measurements. We'd like limit violation, high rate-of-change (ROC) and measurement freeze detection. Option for shedding to bad value o... read more »

Computer Numeric Control

PING: Bottle Bob. You're famous!!

by Steve Walker
Lifted from an article in Hot Rod, July 2012 issue: an interview with Larry Dixon HRM: When was the last time you lined up with someone who truly intimidated you? LD: Wow! You'd have to go back to d... read more »

Solidworks CAD Design software

SolidWorks Training: on the decline.

by Dennis Lubing
Unfortunatley, like most companies in our new economy SW Corp. is not doing well. What are we building? Anyway, they are no longer teaching the courses in their software like they used to. Most peopl... read more »

AutoCAD discussions

Mobile 3D "replicator"

by jasalzer7
With iPad - from photos to 3D models: http://budweiser.cadstudio.cz/2012/05/go-mobile-from-photos-to-3d-models.html Jan read more »

PRO/Engineer (Creo) discussions

Datum Curve by Equation and Parameters

by PLQ
Geetings: I'm new to Creo, but used Pro/E back in Ver. 20 and some WF releases. I have a defined model PARameter and would like to use it as an end value for the variable 't' when creating a Datum Cu... read more »

Model Engineering

Application of engineering and manufacturing technologies to creating scale models and small machines and mechanisms. Various hobbies that require the use of machining, casting and other processes also used in manufacturing, are discussed here.

Model Engineering in the UK

C-Spanner for Colchester Student

by Mike Perkins
I would like to swap chucks and I don't have a C-spanner. It should be around 5.5 or 140mm diameter and would be grateful for any pointers where I could get one. -- Mike Perkins Video Solutions Ltd... read more »

Model Railroad Forum

DCC sound question

by Tom
I'm picking up a new Broadway Limited E6 A & B tomorrow. Each unit is powered and has DCC sound. This is my first foray into DCC sound. Will the two sound units conflict with each other or will they ... read more »

Scale modeling discussions

Dragon Model: 1/144 EA-18G on CVN Deck

by Man-wai Chang
http://www.1999.co.jp/eng/10060389 -- @~@ Remain silent. Nothing from soldiers is real! / v Simplicity is Beauty! May the Force and farces be with you! /( _ ) (Fedora 15 i686) Linux 3.3.... read more »

Model railroading in the UK

A new attraction : "Velo-rail"

by lalogne07
Hello, I'm glad to show this new attraction we called it velo-rail . We try to operate touristically this beautiful line of railway : http://www.lamastre.net/2011/09/24/teste-pour-vous-le-velorail-de... read more »

RC aircraft models

Re: YS Engines

by yser
Boo Wrote: I've noticed from reading several of Clarence Lee's reviews, that the compression ratio is higher on air chambered engines (currently on the 1.15) compared to non-air chambered engines; c... read more »

Model rockets forum

rec.models.rockets FAQ Part 03 - Rocketry on the Internet

by rmrfaq
Archive-name: model-rockets/internet Rec-models-rockets-archive-name: rockets-faq/part03 Posting-Frequency: weekly Last-modified: 2002 May 29 URL: http://www.ninfinger.org/~sven/rockets/rmrfaq.toc.ht... read more »

Lego Mindstorms Discussions

RCX firmware download problem

by Andy Johnson
Hi. I hope someone can help me with a problem with getting an original RCX 1.0 system working with a current PC. I bought the RCX 1.0 system back in (I think) 2000 but its been in storage a long time... read more »

Using Lego and compatible building blocks

Faroese landscape (work in progress)

by Jacob Sparre Andersen
I am working on a small scene representing a typical Faroese landscape. There is a narrow country road snaking along the side of a mountain, crossing a small stream on an even narrower bridge. I hop... read more »

International Engineering (BETA)

We provide access to several professional and hobby engineering newsgroups in languages other than English. Due to heavy use of technical and scientific terms, these discussions are relatively easy to translate to the language of your choice. Please note: support of groups in languages other than English is still in BETA. Some features, such as post and reply, are not currently working in the international forums.