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MEW 180

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Peter Riedie Riedie10/08/2011 23:13:44
1 forum posts
Posted by Alan Jackson on 10/08/2011 22:22:19:
Figure 9 on page 40 of MEW180 shows a right angled slit into the bore to clamp the shaft.
This is a good example of computer design which is untested. How would you propose a potential builder would cut this slit?
Alan
 
 
 
Gulliver ????
alan frost11/08/2011 00:33:14
137 forum posts
3 photos
It appears to me that the root cause of this and many similar problems is that ME and MEW current ownership is in the hands of a company purely interested in maximising profits and with no interest at all in customer service. My guess based on several bad experiences is that they pay peanuts and we get monkey service. In general this seems to be the way the world continues to go and I suppose even bad ownership is preferable to no ownership and no magazines. Oh, for the days when niche magazines were largely staffed by enthusiasts with some notion of customer service.
 
I have a great deal of sympathy for the editor who has to field most of the complaints. My only criticism of him would be that he spends too much time defending the indefensible but then the indefensible pay his salary so who am I to criticise ?
 
It is however interesting to compare the efficiency of the ME/MEW site with the Homeworkshop site , run by a couple of unpaid (except for first choice of QCTPs ) amateurs which receives constant and deserved praise, and even the odd donation. They have incorporated constructive suggestions into the site , usually very successfully . Usual disclaimer.
 
My main complaint would be the recent quality of the magazines' content (I , to some extent , absolve the editor, who can only print what he gets) altho I bought issue 180 which showed improvement IMO with short articles which related to issues recently raised in internet forums. Was this coincidence ? Maybe DC should commission articles which relate to current issues ?
David Clark 111/08/2011 09:02:00
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3357 forum posts
112 photos
10 articles
Cutting that slot.
Use a hacksaw.
Cut down from the outside.
Cut along from inside the hole.
Job done.
Simples.
regards David
 
John Stevenson11/08/2011 09:27:40
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5068 forum posts
3 photos
For something like this it's up to all of us to take what is offered as a concept in design only, remember someone suggested EDM, David suggested a hacksaw.
 
What happens if we have neither? After all we do have equipment limitations.
 
Another way would be to mill a step and add a second piece.
 
Going back to David's answer it would still work if after boring and drilling all the holes it was hacksawed into two pieces.
 
Get real guys, it was offered as a concept design, accept it as such and work round it.
If it had been offered as a complete and proved design for say a Myford, someone would be complaining it wouldn't fit their Boxford.
 
John S.
Alan Jackson11/08/2011 10:57:58
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276 forum posts
149 photos

If it is offered as a concept, it is therefore put up as an untried design for review.The premise of the design is to save the forces being applied by the existing saddle drive mechanism which is not designed for the proposed axial shaping forces, it applies the force at the lowest point of the saddle. This leaves the cross slide and topslide to deal with the bending moment due to the distance up to the centre height. Putting bending forces onto the topslide, which also is not designed for this. A design which applied the axial force higher up and in line to the cutting tool direction would avoid the bending moment being applied to the topslide and cross slide. As such the design only achieves about half of its premise that it proposes to protect the lathe from axiaI shaping forces that it is not designed for. Is this fair criticism?
 
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