If you put any filtering in the way of caps on the supply you are going to get about 1.41 times the AC voltage...
I'm in a similar situation: years ago I bid (on ebay) for some servo motors that turned out to be steppers. German made, 4 nm. 205 V and pretty good frequency response ... oh yes ... 3 phase. Still HAL should be capable of driving them. speed spindle motor with a > tachometer > at 12 and at 24 volts: > > 12v =4500rpm > 24v =9000rpm > > If I rectify 110AC I believe I would get about 130 volts DC > and from the above numbers that would mean I should expect about > 49500 rpm > Which is suspicously close to what the manufacurer advertises for > the newer > machines. > So it looks like I will make a supply using a small isolation > transformer. > > Thanks to John Kasunich for his tips... > > My next problem is that I have discovered that the steppers on this > machine > are 5 phase. > Granted, These are very precise German made stepper motors but I > don't think > I > will be able to find a low cost controller to drive them. Unless > somebody > out there knows > of an economical solution that I have overlooked. > > It's not beyond my capability to program a pic and design a circuit > to drive > them but this > would entail more time than I am presently willing to commit to this > conversion. > > This being the case, I guess I will have to swap the motors for > something > more common. > It's a shame really, these motors have .72/.36 degree resolution > indicated > on them and I've > read elsewhere that 5 phase steppers run very smooth. I am going > to try to > preserve everything > when I convert the motors so that I can put the originals back in > in the > future, should I find a suitable > controller. > > Since this was a pcb router, the gantry sets very low to the table > on this > machine. > After looking things over I've determined that I can safely raise > the gantry > using a pair of 1-1 1/2 inch > thick spacing blocks. This should then provide me with an acceptable > amount of z travel. > > The final step is to design the z axis. This should'nt be too > difficult, > given that I will only have about > 2 inches of travel to contend with. y plan is to make the spindle > motor > mounting flexible so that I can > quickly inter-change between the little high speed motor and a > larger router > motor. > > > > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
