From: Milton Aupperle <milton@outcastsoft.com>

Date: December 22, 2009 8:43:25 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] guiding

Mark;

The iBooks likely do not have enough power to run both cameras at the same time.

The same thing happened with the old iMac G3s, they were under powered and could not run multiple bus powered devices at the same time. I know of other people running 2 scorpions at the same time on G4 Mac Minis (a proto type for stereoscopic Mars Rover project), but Apple varies the specs on all there products without notifying anyone of what the actual draw limits are.

I've previously outlined a procedure to force the power draw to come off a powered FireWire Hub on this list. I don't recall the message, but it's there if you want to look for it.

HTH..

Milton J. Aupperle

President

ASC - Aupperle Services and Contracting

Mac Software (Drivers, Components and Application) Specialist

#1106 - 428 Chaparral Ravine View SE.

Calgary Alberta T2X 0N2

1-(403)-453-1624

milton@outcastsoft.com

www.outcastsoft.com

On 22-Dec-09, at 6:55 AM, gaffney.mark wrote:

I`ve added 2 new photos to my set-up C9.25XLT OTA folder..I`ve found that since the iBook only has 1 firewire port & the Scorpion CCD won`t share my current FW hub with another camera the only alternative (using the Scorpion) is back to bringing out a monitor connected to another indoor computer, on a long VGA cable to be in range of the screen when focusing. This means using usb extension cables for the keyboard/mouse. My filter wheel, (an ATIK Fira 1) should be in the mail by Christmas eve..then it`s down to saving for some Astrodon E-series LRGB filters..

Mark.