General question to audience - how are you doing the warmup of
spindle? Immediately at full speed? I am idling it for few minutes at
low speed (around 3000-5000 RPM) instead of going to full speed
immediately. The idea is that grease is stiffer when cooler and warmup
at lower speeds increases the
On 3/13/23 12:51, Leonardo Marsaglia wrote:
[...]
Well, I tested it for almost an hour with no load at 15000 RPM and
the temperature settled at 55ºC in the bottom side where the bearings
for the tool holder are, and almost 65º in the body part where the
stator is.
According to one of the
On 3/13/23 12:15, Todd Zuercher wrote:
The wrong VFD settings can cause an overheat due to overcurrent. Were you
running the spindle at lower RPMs? Router spindles generally don't like
running at speeds less than 6000rpm, especially if the VFD settings aren’t
right. The VFD needs to be set
No, they are not. Yes most small high speed router spindles (less than 10hp)
are 2 pole. But all of the big HSK-63f tool changer spindles on our big
routers at work (9kw+) are 4 pole. Which by the way makes getting a suitable
VFD to run them much much more difficult. Most VFDs are limited
Leonardo, are you sure about those Hz vs. RPM numbers? AFAIK all high
speed spindles are 2-pole motors (correct me if I am wrong on this),
then you should have 200 Hz for 200 RPS = 12000 RPM and 400 Hz for 400
RPS = 24000 RPM
Viesturs
pirmd., 2023. g. 13. marts, plkst. 18:55 — lietotājs Leonardo
About the configuration. I don't know how to post that without making a
mess but I just used the parameters that the spindle manufacturer sent me.
With that config I was working ok for more than 6 months. So unless
something was right there at the limit too far from the correct one. The
main
For a router spindle (designed to run at 12-24k rpm) we normally run a warm-up
routine that takes about 5 min. Run the spindle at 50% of its maximum rated
speed for 2 min, then 75% for 2 more min, and then 1 min at 100% of the maximum
rated speed.
Also I like to do a spindle run in on any
Most of the big VFD manufactures do offer high frequency versions of their VFDs
but you might have to call and ask for it. For most it is simply loading in a
special firmware version at the factory that allows the drive to be set to the
higher frequency. There is usually a compromise though
>
> PS, I'm still more inclined to thinking either there is a problem with the
> VFD's configuration, or the spindle bearings are going bad. I've never had
> a drive cause problems like you're describing (not that I have that much
> experience with drives going bad.) Usually either they work or
Hi guys, hope you are doing well.
Well, today I tested it again and had the same behaviour as before. It
works perfectly at the beginning but then it fails and gives me an
overcurrent alarm.
I took it apart and nothing seems to be wrong at first sight. I'm
thinking about replacing the capacitors
I can imagine marginal settings push a system over the edge into failure at
extreme temperatures. Just for example, I was setting up a Yaskawa F7
hi-frequency drive for a 13kw 24k rpm spindle a couple weeks ago. The drive
was starting and running the spindle seemingly fine while I was testing
>
> I can imagine marginal settings push a system over the edge into failure
> at extreme temperatures. Just for example, I was setting up a Yaskawa F7
> hi-frequency drive for a 13kw 24k rpm spindle a couple weeks ago. The
> drive was starting and running the spindle seemingly fine while I was
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