--- On Wed, 3/20/13, andy pugh <bodge...@gmail.com> wrote: > I have a feeling that Anilam used tachos on the motors and > glass scales on the machine slides. (Though maybe not always). > > In that configuration I think that keeping the existing > drives is > likely to be easier, but if switching to the PWM controller > then it > isn't so much a case of improving the encoders as adding > them. > However, I guess that the tachometers become redundant at > that point, so it may not be too difficult.
It has glass scales on X and Y on the table, Z on the quill. The issue with keeping the original controllers is that one is gone, missing, MIA - along with the X axis servo motor. If there's a selection of different control boards that can be adapted to replace it, that could save some money. If it has to be the exact same as the other two, that will tip me towards pulling out everything except the motors and power supply (also leave anything else original as needed for motor power), possibly even the motors depending on price of 3 newer style VS one old Baldor or equivalent. As for the spindle drive motor, I don't have three phase power but I do have 220V and know some local places to get a 220V single phase real cheap, or even just swap for the three phase that's on it. I uploaded some pics of the mill here. PartsByEMC.com/pub The rust looks worse than it actually is. The table moves easily, I ran it forward then back a bit, the way wipers scraped most of it off and there's still lube in the ways under the table and between knee and base. Could rapidly go downhill if I don't buy it, fortunately where it is tends to be pretty arid most of the year. As you can see in the front shot, the CRT is just laying loose in its box. Since there's no easy open access on it, I couldn't pop it open to see the condition of what's in there, or if there's anything missing. There's a couple of property tags on it, former owner was AC-Delco Electronics. The projects I have in mind for this aren't going to require exceptional accuracy, they're just the sorts of things that aren't easy or even possible to do on a manual mill. Doesn't matter to me if it won't be able to hold 0.0005" tolerances or even 0.002". The main thing is how cheap I can get it going. I've recently rehabbed a 1940 10" Montgomery Ward (made by Logan) and a 1967 9" South Bend lathe, both of which had been written off as basket cases. This mill as it sits is in far better condition than those lathes were. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
