Re: [Emc-users] Cheap MPG

2009-05-08 Thread Rob Jansen
Well, Kirk did it again! > I think MPG's are too expensive, so I am trying to see if I could make > one. What I have so far is at the top of the page here: > http://www.wallacecompany.com/machine_shop/Shizuoka/ > I found this MPG http://www.myvoice.nl/freesmachine/images/encoder-handwiel-voork

Re: [Emc-users] Cheap MPG

2009-05-07 Thread Jon Elson
Chris Radek wrote: > Through long painful experience using a machine that has a lot of > buttons like that, where you have to look at a display while madly > stabbing the button repeatedly until the display says what you want, > I've come to the firm conclusion that it ... sucks. Much better is a

Re: [Emc-users] Cheap MPG

2009-05-07 Thread Chris Radek
On Thu, May 07, 2009 at 05:31:43PM -0700, Kirk Wallace wrote: > At slow mpg rates each, you get a fast stop - start > which can shake the whole machine. Has anyone else had this problem? This is why the ilowpass component was made - it works great. > I am planning on having the mpg and two butto

Re: [Emc-users] Cheap MPG

2009-05-07 Thread Jon Elson
Kirk Wallace wrote: > As a 100 pulse per revolution encoder, what I have so far works well. > One problem is that in the .01" per pulse scale selected, the axis does > what is is told to do, which is move .01" at maximum velocity. If you > spin the mpg at moderate speeds, the .01" commands stack up

[Emc-users] Cheap MPG

2009-05-07 Thread Kirk Wallace
I think MPG's are too expensive, so I am trying to see if I could make one. What I have so far is at the top of the page here: http://www.wallacecompany.com/machine_shop/Shizuoka/ Thanks to jmk, swp and tom on IRC, I was able to come up with the pyVCP files to jury rig something that seems to work