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Re: Bombarding question

Posted By: caliph23
Date: Thursday, 19 November 2009, at 2:39 p.m.

In Response To: Re: Bombarding question (SVP Neon Equipment)

It is true that the problem is more pronounced when I attempt to process more footage, but I noticed the symptoms when processing one 6.5ft 15mm channel letter.

What is the best way to measure the secondary voltage and the maximum short circuit secondary current? What numbers am I looking for?

The is no information on the bombarder. I sent a photo to daco and they recognized it as one of their 12.5kva models. Would they have info on the duty cycle?

Regarding the vacuum pump, all I can tell you is that exceeds the performance times for temperature and torr that I downloaded from your website.

could the problem be moisture?

Thanks for your help.
Rafe

> KVA ratings can be very misleading,
> depending on how the bombarder manufacturer
> (or equipment supplier) rates the duty cycle
> of the bombarder among other things. Instead
> of the claimed KVA, I am more interested in
> the secondary voltage and maximum short
> circuit secondary current. These are the
> main factors in determining the length and
> diameter of glass that can be processed.

> Another factor to consider is, as you
> mentioned, what type of choke you are using.
> A slide choke will typically reduce
> bombarder output by 1% to 2%, while a DC
> reactor (variac choke) will reduce bombarder
> output by as much as 10% to 12%.

> The Alcatel vacuum pump will not affect how
> big of a unit you can bombard, but it will
> affect how fast that unit is evacuated after
> it has been bombarded.

> You did not mention the diameter and length
> of the unit or units you are having this
> problem with, so it is difficult to give any
> specific recommendations. However, based on
> what you did say it sounds like you are
> trying to process too much glass at one time
> for the particular bombarder/choke combo you
> have.

> Mark

Messages In This Thread

• Bombarding question -- caliph23 -- Monday, 16 November 2009, at 9:31 p.m.
  • Re: Bombarding question -- SVP Neon Equipment -- Thursday, 19 November 2009, at 1:15 p.m.
    • Re: Bombarding question -- caliph23 -- Thursday, 19 November 2009, at 2:39 p.m.
      • Re: Bombarding question -- SVP Neon Equipment -- Thursday, 19 November 2009, at 5:41 p.m.

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