RE: [CAD_CAM_EDM_DRO] Re: sizing transformer for servo system ?

I don't know where you are Dave, but in the UK there are loads of
Transformers kicking around cheap that are not Rohs compliant (lead free).
Rapid Electronics had loads, I bought my reservoir caps from them, got six
for the price I would have expected to pay for two.

Also in the EU, a CNC machine is a control and measurement system and exempt
from RoHs until 2008

I am told the USA are going RoHs compliant in January so there may be some
cheap stuff over there, though I can find nothing written regarding this
date.



Regs Mark



_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of turbulatordude
Sent: 28 December 2006 08:11
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: sizing transformer for servo system ?



--- In CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
DRO@yahoogroups.com, Anders Wallin
<anders.wallin@...> wrote:

>
> Hi All,
>
> I am setting up a servo control system for a 3-axis mill using 90VDC
> servos which are specified as 7.8A maximum continuous current and 38A
> peak current.
>
> On the transformers I am looking at, 2x38VAC seems to be a common
> secondary configuration.

Keep looking.

you can find 55 volt secondaries with 70VA on e-bay.
or even 63 volt 800va transformers. 7540255500

270072023841 for a power supply

check the seller for more offers.

Dave





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