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| 60KRPM Spindle |
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| PK:
--- Quote from: JHovel on February 29, 2016, 09:02:00 PM ---PK, looking very good! Can you give me a little more detail on the spindle please? The video shows you setting the VFD frequency to 600Hz. That equates 36krpm for a 2-pole motor. --- End quote --- I've configured the VFD to show calculated RPM. It's actually running at 1KHz. The spindle is only 300W but the drive can do 1.5KW so switching losses at 1KHz don't result in excessive heating.. This is the setup I bought http://www.aliexpress.com/item/0-3KW-Water-cooled-Spindle-Motor-60000rpm-75V-4-5A-1000Hz-ER8-D48-120mm-GDZ48-300/2052012943.html?spm=2114.30010308.3.1.Ob5ZwG&ws_ab_test=searchweb201556_1,searchweb201644_4_505_506_503_504_301_10020_502_10001_10002_10017_10010_10005_10006_10011_10003_10021_10004_10022_10009_10008_10018_10019,searchweb201560_2,searchweb1451318400_-1,searchweb1451318411_-1&btsid=09d57ead-ee38-404d-9042-e2d731a059ab Although I didn't pay that much. Go looking for 60KRPM spindle and you'll find lots... PK |
| PK:
So I used it in anger a bit today. Total of about 2.5 hrs of spindle on time. The job was cutting a mold tool from some machinist wax we made a few years back. Its swinging a 3mm two flute ball nose at 49KRPM and there's enough chip loading that you can hear it start to slow down a little during the roughing pass (3mm DOC, 100% step over 2000mm/min). All worked a treat! |
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