Gobo Rotators… Hire?

[SceneMaster]

Hi,

 

I have done a search and can’t find any info on what I am looking for…

 

I am after some gobo rotators (to hire) for some sil30s or maybe some patt23s. I suppose that the sil30s will be easier to get hold of. Firstly are gobo rotators mainly DMX or analogue controlled and I presume you would then have to send them a secondary straight power supply. Unless you plug them into a lighting dimmer which then controls the speed depending on the output of the channel although I doubt this (I really don’t have a clue about gobo rotators )?

 

Sil30s are gobo size M aren’t they (again I don’t know and really is should considering this is the main profile I am working with a the moment).

 

How much would a standard gobo rotator cost to hire for a week? I am going to contact my hire company but it would be useful to know a guide price before the quote me.

 

Thanks,

 

Another (obvious and easy) question (which I just don’t know) is… I was just looking at a DHA Gobo catalogue from a lighting sales company… what is the convention for gobo diagrams? Is the dark black bit metal work and the light bit where light will get through all is the metal bit the whole in the gobo where light will get trough to project that image… I have used gobos before loads of time but never had to order any in…

 

Here is the page I was looking at...

 

Hope this makes sense…

 

 

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[Stu]

On the URL given the black is the bit that lets the light through, or thats how it seems to me.

 

I seem to remember Sil 30s being A gobos - in fact 99.9% sure off that.

 

Stu

[SceneMaster]

On the URL given the black is the bit that lets the light through, or thats how it seems to me.

 

I seem to remember Sil 30s being A gobos - in fact 99.9% sure off that.

 

Stu

<{POST_SNAPBACK}>

 

Thanks, shows how much I know about the sil30s I have used them for ages but never with gobos we usually hire other lights in for that and specials... and use our 9 sils for general cover... this is a school anyway... and other places I have done stuff I just don't ask, I just find the relevant gobo holder and gobo that fits.. Presume then I will need a Size A rotator?

[Stu]

You'd need a Size A rotator yes, the Sil 30s may take B's as well if DHA make a holder to fit in the gate that has a Size B hole cut in it - I should of thought they did. An A size holder for a Sil 30 is GH01 for your information.

 

As for the rotator, you'd need to make sure that it's specifically meant to be used in a Sil 30 as just because a Sil and a Cantata both take an A size gobo (for instance) the slots to take the holders can be different widths, thus meaning a Cantata rotator might not fit in a Sil holder and vica versa.

 

Gobo sizes for various profiles can be found in the WL Reference PDF by the way (along with lots of other info on different lanterns), available for download from thier WWW site.

 

Stu

[benatkinson]

Hey,

 

Im just a kid but have seen these demonstarted before.

 

Excuse me if this isnt what you are looking for but this sounds like the right page

 

here

 

Any help?

 

Ben :huh:

[T.D.]

The DHA web page listed by ben should help.

 

Take a look also at the other DHA pages (if you havn't already):

DHA Homepage

Rotator Mechanisms

Rotator Lanern Size Ref

 

Regarding DMX etc. Again you can wade through the DHA page, but in general:

 

1: the old style rotators (still available) are fixed speed (eg 1 rpm) with a switch to swap the direction of rotation. They just require 240V power (but which mustn't be dimmed).

 

2: Next up came the controllable ones which required a seperate control box (I think the DHA one controled up to 4 rotators) with a knob on it to vary the speed.

 

3: Next comes the same principle but the seperate box has DMX inputs

 

There may now be rotators that have DMX inputs on board - I looked briefly at the DHA page but couldnt work that out. I've only used the ones I mentioned.

 

You can get double rotators that rotate two gobos at the same time (I've never used these) and there are now rotators that offer rotation and indexing. Indexing allows you to orientate the gobo to a set angle at which it will remain (ie not rotating).

 

Regarding the Sill, they do indeed take both A and B size (you use a different gobo holder) but I think the rotators only take B size (check the fitting page listed for DHA rotators).

 

Don't forget to fit an accessory bond on the rotator so it can't fall out the lantern if something drops.

 

I seem to remember Stage Electrics hold DHA rotators in stock for the Sills, I guess white light probably do as well.

 

Hope this helps

 

T.D.

[LeeStoddart]

Another thing to check is the spacers on the Sils. Between the lamp housing and the lens tube is the gap where the gobo holder goes. Into this position is where you would put the gobo rotator. The mechanism of the rotator is significantly fatter than a gobo holder.

 

The oldest model Sils did not have sufficient space to insert the rotator - the later models have a larger gap.

 

Check the size of the gap before you go any further. From memory you need about 10mm to insert the rotator.

[SceneMaster]

Ok, yep I was planning to go with a DHA rotator but this is hire so I don't know... what is a estimated guide price on rotators though? (I know that hire companies will all be different but a rough average estimate ;))