Would y'all comment a bit power supplies, linear or switching
Pro's and con's
Do's and don't
I see a great many lower priced switching supplies
Richard
--
Monitor your physical, virtual and cloud infrastructure from a
On 20 November 2012 11:23, kqt4a...@gmail.com wrote:
I see a great many lower priced switching supplies
Possibly because a motor power supply contains too few components to
bother selling as a unit.
A transformer, rectifier and capacitor is all that is needed. And the
transformer may be
On Tue, Nov 20, 2012 at 11:23 AM, kqt4a...@gmail.com wrote:
Would y'all comment a bit power supplies, linear or switching
Pro's and con's
Do's and don't
I see a great many lower priced switching supplies
Some switchers need a minimum load to work
I use a switcher for my stepper driven mill,
linear PSUs can be momentarily overloaded quite a bit. That's what I've
heard make them preferable for stepper/servo PSUs. The servo/stepper drive
will contain more or less circuits for voltage and/or current control, so
it's not that important to have a well-regulated DC-rail for the drive.
If
On Tuesday 20 November 2012 11:17:54 kqt4a...@gmail.com did opine:
Would y'all comment a bit power supplies, linear or switching
Pro's and con's
Do's and don't
I see a great many lower priced switching supplies
Richard
It depends on the supply whether it can be used with steppers or not.
2012/11/20 andy pugh bodge...@gmail.com:
On 20 November 2012 11:23, kqt4a...@gmail.com wrote:
I see a great many lower priced switching supplies
Possibly because a motor power supply contains too few components to
bother selling as a unit.
A transformer, rectifier and capacitor is all that
http://imagebin.org/236609
Pretty much self explanatory. Read the error message in the UL corner.
I think my machine has been smoking the wrong stuff.
What is going on here?
Quick cure?
TIA
Dave
--
Monitor your
On Tue, 2012-11-20 at 19:08 +0200, Viesturs Lācis wrote:
2012/11/20 andy pugh bodge...@gmail.com:
On 20 November 2012 11:23, kqt4a...@gmail.com wrote:
I see a great many lower priced switching supplies
Possibly because a motor power supply contains too few components to
bother
On Tuesday 20 November 2012 14:15:44 Viesturs Lācis did opine:
2012/11/20 andy pugh bodge...@gmail.com:
On 20 November 2012 11:23, kqt4a...@gmail.com wrote:
I see a great many lower priced switching supplies
Possibly because a motor power supply contains too few components to
bother
Ah yes, that error! It is a problem
- Original Message -
From: dave dengv...@charter.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Tuesday, November 20, 2012 8:45 PM
Subject: [Emc-users] Eh! What?
http://imagebin.org/236609
Pretty much self
For my servo CNC lathe conversion, I bought a linear power supply with a
toroidal transformer from AnTek.
http://www.antekinc.com
They're a little pricy, but nothing like the prices I've seen in this
thread. The AnTek power supplies provide the higher voltage needed for
the stepper or servo
On 11/20/2012 03:44 PM, Bruce Layne wrote:
If you want to eliminate the high frequency noise from a switching power
supply, you could use ferrite beads on the output of the switching power
supply, or wrap that output wire several times around a ferrite toroid
core to act as an RF choke.
I
An alternative I spotted on eBay some time ago (and there seem to
always be several)
http://www.ebay.co.uk/itm/STADIUM-5-2V-12V-12V-24V-34V-TRANSFORMER-POWER-SUPPLY-/261124905065?
(look at his other items)
He had some 10A 50V supplies a few weeks ago (with a bunch of other
voltages too)
--
atp
Not strictly EMC but I am sure people here will know the answer. We all
know that a 3-phase VFD can often be used off one-phase. Since all the
current is then pulled off the one leg of the input rectifier, the standard
wisdom says that you derate the VFD power in this situation by a factor of
2 or
On 20 November 2012 22:28, Przemek Klosowski
przemek.klosow...@gmail.com wrote:
It occurred to me that since the input circuit should be just a 3-phase
rectifier, it should work to connect all three input terminals together,
and feed that from the single phase.
Two wires, three terminals.
On Tue, 20 Nov 2012, Przemek Klosowski wrote:
Date: Tue, 20 Nov 2012 17:28:14 -0500
From: Przemek Klosowski przemek.klosow...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
On Tue, 2012-11-20 at 17:28 -0500, Przemek Klosowski wrote:
... snip
I can see that, while equalizing the load across the rectifiers, this
scheme doesn't help with power variation within the 50/60Hz cycle, so some
derating is still called for, I think.
... snip
I've given this some thought
How many kW are you looking for?
Greg
- Original Message -
From: Przemek Klosowski przemek.klosow...@gmail.com
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Wednesday, November 21, 2012 12:28 AM
Subject: [Emc-users] VFD input
Not strictly EMC but I am
On Nov 19, 2012, at 4:31 PM, Bruce Layne wrote:
On 11/19/2012 05:13 PM, Jeshua Lacock wrote:
I asked for the 3D models of the buttons so I can print them out with the
text a different color than the button, along with color coding the buttons.
If anyone wants some buttons printed, just let
On Nov 19, 2012, at 5:17 PM, Sven Wesley wrote:
Hmm.., I digged a bit deeper in the text and vid's. It's a shame the
button
text is moulded with the buttons. To me homing should be made once at
startup. It seems he's using homing when it should be a touch off. I'll
ask
him about it.
Did
If you put neutral on terminal L1 and phase on terminal 2 and 3, it
will simply parallel 2 leg of the rectifier, this will change nothing.
If you don't have enough power, you can try to increase capacitor bank
by adding external capacitor (most VFD provide connection to DC bus).
Take care
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