On 4/25/23 00:56, Thaddeus Waldner wrote:
I would have space for the 125mm motor.
I wouldn’t have space for the stepper driver though.
It doesn't have to be with the motor, the cables are around 6 feet long,
and could be spliced. There are2 cables, one powes the motor, the other
brings the encoder in the motor back to the driver, the encoder does not
go back to linuxcnc.
Nor for the DC power supply that it needs. Or is it line powered?
No unforch. the lc57 driver has a 90 volt limit, dc. Peak torque for low
duty cycles would need around 5 amps.
I need about 5000rpm, and I’m hoping to cap the cost at around $100
2500 is more realistic for these, and the 3nm will run about $130 total.
That's 3nm, what I have on the 11x54's z and can move it at 125 ipm. No
pid's, speed, accel limits in the .ini. Your space limits would kill
this idea though.
On Apr 24, 2023, at 5:24 PM, gene heskett <ghesk...@shentel.net> wrote:
On 4/24/23 17:41, Thaddeus Waldner wrote:
HI,
I have an application where I need a NEMA 23-size 80-120 watt brushless DC
motor. The machine housing doesn’t have space for a 100w DC 24v power supply,
so I would like to use a controller and motor that runs at line voltage.
Does anyone know of a small BLDC/PMAC/Synchronous AC motor that is designed to
run at about 150v coil voltage?
Motors this size/voltage are apparently quite common in kitchen appliances that
use pumps or fans, but I cannot seem to find a plain motor with output shaft.
How much length have you got? A 1 newton meter 2 or 3 phase stepper/servo is
about 80mm behind the flange, and 3 newton meter is about 125mm behind the
flange, both have 8mm shafts, and run on cl57 sized drivers for the 2 phase
versions, can turn more than 2k revs continuously but hot, stopped virtually
zero power and heat unless they are holding up a 300kg knee on a mill. They get
to where linuxcnc tells them to go or shuts linuxcnc down in its tracks, the
closest I've ever seen to a motor that Just Works. I'm using two of them on my
Sheldon 11x54 lathe, shutdown wired up, tested, has never happened while making
swarf. If suitably microstepped, /16 seems to be popular, accuracy is
cosiderably less than a micron. Whats not to like?
I also have 2 of them on a 6040 gantry mill, a one nm on the z cuz the std
motor can only slowly lift the heavier spindle motor, and a 3nm driving a 5/1
worm which drives the B axis chuck to carve the hard maple vise screws I am
making.
They are servo's, priced at stepper prices. If they lose home for any reason,
lcnc is stopped before the work is wrecked. Can your much more costly servo's
do that?
The tech we use marches on. Take care and stay well Thaddeous.
Thanks,
Thaddeus Waldner
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Cheers, Gene Heskett.
--
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-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
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Genes Web page <http://geneslinuxbox.net:6309/>
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_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
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