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10Micron GM2000 Slewing At 20 degrees/second

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#1 Tom Polakis

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Posted 19 July 2014 - 02:08 PM

I have had a few sessions now to try out the features of my new 10Micron mount, for now with only a little refractor aboard. The default maximum slew rate is 8 degrees per second, but down a couple menus, it can be overridden with 20 degrees per second. This warning appears in the manual: "Keeping your eye near the eyepiece of any instrument during a move at high speed can seriously harm you."

I think the usefulness might be in meridian flips, or as somebody suggested, perhaps rapidly slewing to a gamma ray burst.

It's scary to watch the mount slew this fast, so I think I'll leave the maximum at 8 degrees per second. As you can see in this short video, it takes some time to accelerate up to that slew rate, and then decelerates when it recognizes the horizon is coming.

20 degrees/sec. slew rate video

Tom

#2 lambermo

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Posted 19 July 2014 - 03:44 PM

cool :)

#3 Hilmi

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Posted 19 July 2014 - 07:19 PM

Reminds me of car assembly line robots.

#4 Per Frejvall

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Posted 20 July 2014 - 01:25 AM

I sometimes use 15 for model bilding as it saves time when yu slew around the sky 100 times ;) Otherwise it is usually from 8 to 12, and the smaller cousing, the GM1000, that I have on my balcony pier is set to 5 in order to not disturb the neighbors. Even though the mount is nice and quiet, the sound does travel well in concrete...

/per

#5 guyroch

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Posted 20 July 2014 - 09:48 AM

It's going to be my turn soon :)

I'm hoping mine will be shipped next week.

Guylain

#6 CharlesW

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Posted 20 July 2014 - 10:01 AM

Slews at that rate can be used to track and image satellites.

#7 Hilmi

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Posted 20 July 2014 - 10:10 AM

And clobber thieves on the head should they attempt a burglary

#8 Tom Polakis

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Posted 20 July 2014 - 11:52 AM

Slews at that rate can be used to track and image satellites.


The mount does indeed have a satellite tracking option, but 20 degrees per second is at least 10 times faster than the angular rate of the lowest satellites.

#9 sdakotaastro

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Posted 20 July 2014 - 08:37 PM

Slews at that rate can be used to track and image satellites.


The mount does indeed have a satellite tracking option, but 20 degrees per second is at least 10 times faster than the angular rate of the lowest satellites.


So they say. ;)

I should have the only GM3000HPS in existence soon.

#10 guyroch

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Posted 21 July 2014 - 08:25 AM

I should have the only GM3000HPS in existence soon.


What are you going to mount on the GM3000HPS that your current GM2000HPS can't handle?

Just curious.

Guylain

#11 Starhawk

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Posted 21 July 2014 - 11:16 AM

I see little reason to go faster than its current limit of 15 degrees/sec. The entire visible sky is traversed in 12 seconds at that speed. It's not like 15 to 20 degrees per second can buy you another 1 minute exposure.

Impressive mount to see in action, though. It's a bit like it's alive.

-Rich

#12 Per Frejvall

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Posted 21 July 2014 - 01:23 PM

Actually, the really fast slew rates only have value for satellite tracking, and then not in the actual tracking but in the flip that occurs automatically.

/p

#13 gavinm

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Posted 22 July 2014 - 08:26 PM

I saw a video of BOOTES-3 being tested. The mount slews at 30 degrees a second IIRC and the OTA has been strengthened to allow slews up to 100 degrees per second - and thats a 0.6m OTA.

Cant find the video now, but thats fast!

#14 Tom Polakis

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Posted 23 July 2014 - 09:21 AM

[quote name="Starhawk"]I see little reason to go faster than its current limit of 15 degrees/sec. The entire visible sky is traversed in 12 seconds at that speed. It's not like 15 to 20 degrees per second can buy you another 1 minute exposure.[QUOTE]

One thing that warrants mention (and is apparent in the video I posted) is that there is significant time spent accelerating and decelerating to that maximum slew rate. That's a good thing, since I don't suppose it would be a good for durability to go 0 to 20 in a tenth of a second!

#15 Hilmi

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Posted 23 July 2014 - 10:17 AM

I figure this is one of those features you would not specifically buy a mount for and would not appreciate unless you have it. Once you have it you will never have the patience to ever wait for another mount to slew.

#16 dawziecat

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Posted 23 July 2014 - 10:42 AM

I agree with Hilmi!!

I am sick and tired of waiting for my AP1600 to flip for a focus star and then flip back to the target.

I know, I know! Poor planning, but it happens.

I know too I should be autofocusing. Hardware problems have delayed that but it will come to pass in good time.

The ability to do really fast slews is a nice feature!

I'd sure hate to snag a cable though! :scared: Not that there's any "good" speed to snag a cable!

#17 WesC

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Posted 23 July 2014 - 04:43 PM

Man, that isn't a slew, its a SWOOP!






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