On 6/12/23 15:58, andrew beck wrote:
Leon I use a cheap Chinese vfd costs about 190usd
And buy a encoder for it. About 50usd and I'm controlling two fanuc
spindle motors here fine.
They auto tuned the motor in about 4 secs and run awesome.
I can get 150 percent torque at zero rpm. If I run a pid loop in linuxcnc
almost a servo level control response
Have a look at the video there are links on there. I made it a few months
ago
https://youtu.be/vARlybdtC6Q
I'll message you in WhatsApp too.
On Tue, 13 Jun 2023, 07:40 Leonardo Marsaglia, <ldmarsag...@gmail.com>
wrote:
Forgot to attach a picture of the label on the spindle drive. Sorry.
El lun, 12 jun 2023 a las 16:33, Leonardo Marsaglia (<
ldmarsag...@gmail.com>)
escribió:
Hi guys, I hope you're all doing well
Sorry for the OT but we have a problem with a Daewoo lathe and as always
this is the first place I think of.
So, this morning the lathe started up as always, but when we selected the
gear to validate the spindle movement the screen showed a 409 SERVO ALARM
and the spindle drive on the back was showing alarm number 12. From what
I
could find on several forums this is an overload alarm and in the worst
case scenario the IGBT firing module or the IGBT module itself could be
damaged.
Is there any way to check this in an easy manner?
Also, is it possible to adapt a normal VFD in case this is the problem?
Because maybe there are some Fanuc Serial protocol to analog voltage
converters (I'm just wishing such an adapter exists) that could be used.
Thanks as always for your help!
Leonardo
Might be ok for short term operation, Leonardo, but 150% at zero rpm
tells me the vfd's max low speed boost exceeds the motors FLA, aka Full
Load Amps. The vfd should have a variable to fix that. Most do
anyway.. Also, most vfd's will have a minimum hz setting which should
turn off the drive below around 10% of 60 hz. I have mine set to
disable at 5hz. I can do 5.5 for half an hour and still lay my hand on
the motor w/o burning it. Who needs a backgear?
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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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