This list is for the discussion of CNC and related topics including CAD, CAM, EDM, & DRO. The list focuses on the construction of home shop CNC machines along...
CAD_CAM_EDM_DRO@yahoo...
Dec 1, 2008 10:43 am
95858
Search the CNCzone website for deepgroove; this problem and the solution has come up before. Main problem seems to be caused by the z axis gib being able to...
Hello everyone, I got tired of sorting through posts in Yahoo groups and decided to create a full-blown forum designed specifically for machinists. There are...
Hi All Just joined and first post; I'd like to know if anyone has had any experience with using Aluminium as an electrode? The scenario is that I want to build...
Roland Jollivet
Roland.Jollivet@...
Dec 6, 2008 5:50 pm
95862
Roland, The biggest problem that I see is that aluminum is a difficult material to work, with electrically speaking. An insulating aluminum oxide layer forms...
Hi Roland, I have never seen aluminum used by my edm customers. I don't know the edm process well enough to say why. If aluminum is readily available and...
Hi Roland, It's a good thing you asked before trying this at home. You may wish to spend a little time reading up on Aluminum's chemical properties. ...
One problem with aluminum as an electrode is oxidation. I have used aluminum before, and the result can vary. For DC power, it aluminum is used for the...
Hi, The reason is very simple. Magnets need a keeper plate to stay magnetized, some magnets loose their magnetism quicker than others dependent on the material...
I don't understand. Keepers are there to prevent demagnetization that takes months or years... and the modern materials like neodymium do not self-demagnetize...
Hi, I have an excelon drill file created by my Protel PCB software. Would someone be able to run this file through a converter to turn it into a G-Code file...
Hi, I have a book here that deals with building a coil and using it to magnatize the ignition components of a Ford Model T, not exactly a new machine using...
I figured it was something like that. I suppose if you had an iron plug the same size as the rotor you could slide it in as you remove the rotor and maybe not...
... I have such a program, if you have a c compiler, it should work. It may only produce the right output if the Excellon file was made with 2.3 format (ie...
I bought a copy of DeskPCB a couple of years ago (and still haven't used it). It's supposed to open an Excellon file .. I'll happily give it a go for you ... ...
If the magnets are of the rare-earth "super" variety (neodynium, boron etc) they absolutly do not need a keeper. I have purchased several hundred of these...
HI Phil, I've heard 2 ways that steppers lose their magnetism. First has to do with the amount of current flowing through the stator windings. I think if it...
Seems odd that they would demagnetize so easily. Can't argue with fact but I have successfully taken a stepper apart and am currently using it without any...
HI Phil Oops, I fubarred, looks like the rotor is the permanent magnet and that's what has to be slid into a keeper as the rotor comes out of the stator. I...
... I'll happily swap you for one of mine taken apart in a moment of curiosity. It still steps, but with NOTICEABLY less torque and gets CONSIDERABLY hotter...
So, guys, what about a bog-std treadmill motor ? Can they be taken apart, or not. Permannet magnet DC motor, surplus center, 130 V DC. I was advised yes, I am...
I have never had any problems taking DC motors apart. I admit I haven't taken my treadmill motors apart but I can't see why they should be any different. I...
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