The 2.2 KW water cooled Chinese spindles that I have are apparently dynamically balanced. There are two machined divots of different depths in two flats on the ER collet nut, apparently to remove rotating mass to balance the spindle. 24000 is a lot of rippums. I guess they assume the collet nut will be indexed to the same place each time relative to the spindle? Or did they balance the spindle somewhere I can't see and then balance the collet nut? It looked like a lot of material to be removed to balance only the nut.
On 6/25/19 12:01 AM, Thaddeus Waldner wrote: > . >> On Jun 24, 2019, at 12:50 PM, andy pugh <bodge...@gmail.com> wrote: >> >>> On Mon, 24 Jun 2019 at 17:29, Todd Zuercher <to...@pgrahamdunn.com> wrote: >>> >>> As far as I know the ER collet holders on these things are always integral. >> For fixed tooling I can imagine making a solid piece to fit the ER >> cavity, retained by a ring-nut. >> >> Or maybe dismantle and re-machine the shaft. I think that these are >> typically plain induction motors, so disassembly and reassembly is >> pretty straightforward. > Before you dismantle a high speed spindle, be aware that some are balanced > after assembly. I have a nice 3hp 18,000 rpm air-cooled Elte spindle. I had > the idea of removing the fan and replacing it with something quieter that is > thermostatically controlled, since I use it mostly for engraving. I called up > a stateside distributor and their tech guy told me that the company bolts the > fan in place, then balanced the entire rotating assembly > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
