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Artemis


Matias Mesa

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Dear Alf,

Yes there is a little loose of power in the rig.

Beside the battery capacity electronic, Tally electronic,

another diode is build in the system.

This diode managing the ?A? and ?B? batteries.

It make sure that they will not charge or discharge the two batteries

in the ?24? mode.

This diode is also passive active in the 12V modus.

For any further questions or information please contact:

service@artemis.com

With best regards Curt O. Schaller

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I have had major problems powering a video camera from my two Artemis HD rigs. I found that there was a voltage drop from the camera battery to the camera output supply lemo on the rig.

 

I sent a rig back to Sachler and they sent this reply.

 

Regarding the overall resistance in the rig.

After changing the complete wiring and electronic you got now the

lowest ohm number ever in an artemis rig.

Well comparing the direct power supply of an onboard battery with the

rig is not very fair, because the combination

of the length of the internal wiring, plus cam power cable, plus

sockets and connector will be about one meter cable in the end.

Of course this will add more resistance to the system than a direct

power supply by an onboard battery.

 

Because we have 12 lines going from sled to top

and the need to have an main plug in the center post,

the diameter of the single pins in the main cable Lemo plug are a bit

thinner.

 

To have less resistance in the system, we would have to change to a 6

pin Lemo main cable connector.

But with only 6 pins in the post, you will loose the HD Video support

and the independent power supply for video power out socket in the

side to side module.

 

 

 

 

Camera's more than three amps (not that much) cant be powerd from the rig, because the cables in the post are too thin, because they need to be thin to fit in the post. So whats the point of the Camera battery on the rig or the camera power socket?

 

I sent this reply to Sachler.

 

 

Dear Curt,

 

Thanks for servicing my rig, but I am now left in a very bad position.

 

I bought two of your Artemis HD rigs for shooting video only, and now I can only shoot video with an on board battery. Surely you should make it clear that the Artemis HD is only useful for very low power video cameras or for cameras with on board batteries only. An on board battery on a video camera makes the camera too long and destroys the dynamic balance and feel of the rig.

 

What is the point of the camera battery clip on this sled?

Can the loom in these rigs be replaced for the six cable type.

 

I think you have a very serious design fault with this sled. It is excellent mechanically but you have a serious problem with the design of the electronics.

 

I cannot find the specification of your rig. What do you quote as maximum current for camera power supply. I cannot get more than three Amps out of it.

 

You asked me what I a thinking. I am thinking that I wish I had bought sleds from another company to be honest.

 

 

Yours sincerely.

 

Alf Tramontin.

 

 

 

I have had no reply since February.

 

A

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That sounds very silly, Alf, that reply from Sachtler.

 

What I find strange is that they have an "independent power supply" in the side to side module.

 

To be honest, I don't see the reason for that because this rig is build for HD-video camera's which have a very stable or better, predictable power requirments. It is mainly for very unstable surges, as can happen with certain film camera's that you need some stabilisation (or batteries that are strong enough).

 

I have the feeling that this might be one of the bottlenecks.

It can hardly be the 1 meter cable, the resistance in such a short cable is not the main problem, unless you make the cable too thin.

 

I would take out that Independent Power Supply, there is no need for it, it can only give you less battery efficiency. Video camera's are perfectly fine with direct battery connection and don't need extra electronics between that, only if you would power from a much higher supply, like 2 batteries in series (26.6 or 28.8 volt).

 

and in the last case, where you would have a decent converter that transforms it back to say 13,5 volts, you would not experience much problem I think.

 

I love to hear a good explanation from Sachtler!

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Just a guess from me:

it has maybe the same cabling inside as the Full Size rigs, limiting the power output to 3 amps, while a NORMAL Cine Alta is about 60 to 80 watt consumption, (5 to 8 amps), with all bells and whistles......???????

And what does the Genesis swallow....???

 

But 3 amps is ok for DV....

 

Curt, can you explain the situation with the HD rigs from Alf?

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Hi Alf...

 

What configuration of Batteries are you using?

Best,

 

Gus.

 

 

I am using PAG 90's. I have my rig set up so that the Preston and and Monitor are powered from the monitor battery. The camera battery is feeding just the camera and the built in tally system.

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Still no reply from Sachler. Call this support !!!!!!

 

Hey Alf you got my private email why do you not use to talk to me, Curt :-)

 

 

Curt, if you readthe above,I did reply to you by email and I have had no reply. DO YOU CALL THIS BACK UP? I WISH I HAD NEVER BOUGHT THESE TWO ARTEMIS RIGS,I cant use them for video

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Tell me about it!!!

 

I've been trying to find out the price of an artemis EFP rig for 2 weeks now. Tried Sachtler asking for prices or dealers..... Bugger all!!!

 

It's like trying to staple jelly (Jello) to a ceiling.....!!!!

 

Ant

 

Hi Ant, do you want to buymine?

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Hi Guys,

 

I have a Artemis Cine, and all I can say is that I'm more than satisfied with the rig and with the service I recived from Sachtler, and especially Curt! He always answerd to every email, and every quastion I sent him! The only problem I had with the rig is that they forgot to put in the packeage the Camera Plate screws, and they send it the next day, free of shipng charge of course!!

 

Regarding the voltage drop, this is normal on every rig! You cant expect to have the same runing time with the same batterie attached to the Camera directly, and powering the camera from the rig!!

 

Anyway Alf, what is the runing time of your camera with the batterie attached to it directly, and when the camera (and only camera, without the motors) is powerd with the SAME batterie from the sled?

 

regarads, igor

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