RE: [ap-gto] Re: 2016 Park 1 Bug or Feature


Jan 5, 2016

 


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#50176 Jan 5, 2016

Some programmers would say this is a feature and not a bug.:)

I can easily live with this until March 1, 2016 or forever.

I see this new Park 1 position as a modified Park 4Scope pointing to Northern horizon on the East side.Counter weights level on West side.

This morning (Jan 4, 2016) around 11:00 A.M., I powered up my 900GTO to see this new Park 1 feature.

Keypad only.�� No computer.

Resumed from Park (mount was at Park 3)

Did not change the keypad date to 2015Keypad date displayed Jan 4, 2016

Did a goto to and found the Moon, then Vega

Centered Vega and ReCal.

Sent mount to Park 1.

Mount moved scope to East side pointing North.Bubble level was level on both counter-weights and scope.

Powered down mount 20 seconds and back up.

Selected RESUME from Reference Park 1.

Did a goto to Moon then Vega.�� No problems here.I like this new bug/Feature.I have been waiting for the Keypad Park 4 option and now I essentially have it.

I Love my 900GTOJimmy



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#50223 Jan 6, 2016

Are you saying there is a new Park 1 that puts the telescope in the east pointing north.���� That would be fantastic because for RC's park 4 is stupid because you have to use longer cables than needed for AP1200 mounts.�� I am working with someone setting up a ASA 20 on a 1600 and Park 4 does not work well because the computer and desk is in the south, common for remote sites, so it is not a good position.

We don't use a Key pad but I hope APCC supports new Park 1 position I will add that with APCC, it does not really matter where you park because APCC will protect the mount which is why I got it.



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#50226 Jan 6, 2016

Sorry but your cables should be long enough to point anywhere in the sky or you.ll likely have problems. I.ve been using park 4 since its inception without issue on my 12.5. RC and AP1200. My computer is in the North facing warm room 20. away and all cables are run through conduit. I made sure that they were long enough to have slack when pointing anywhere in the sky and at any rotation angle (rotator). Serial cables are one piece and the USB Active Extenders are long enough for a single run through the conduit and only the 16. USB cable is used at the equipment. That is to say no cables are extended with connection in the conduit. Those made outside are secured to ensure they don.t disconnect by accident. All cables run in the equipment area are sleeved in Flexo F6 which can be found here www.techflex.com/prod_f6w.asp ��Steve �� ��From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] Sent: Wednesday, January 06, 2016 10:43 AMTo: ap-gto@yahoogroups.comSubject: [ap-gto] Re: 2016 Park 1 Bug or Feature



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#50230 Jan 6, 2016

well I agree but the telescope will never be pointing south at 0 degrees above the ground so what is the point.���� I am not the only one that says park 4 is not good and they wont use it.�� To end the end the story pointing the telescope north like park 1 is a better option.������ what I would prefer and�� this can be done in the Sky X, although I don't use it, to set a park position anywhere you want and forget about park 1-4.�� Do you know if APCC does this? I will go look.�� Anyway, its beside the point.�� Park 1 was only good when you were with the telescope and not in the remote world, so I agree a park 4 is better, I just wish it did not point south LOL

The reason I limit my cables to 15 feet is the USB to cameras.�� I don't care about USB hubs because that is just another problem so I tend to put everything to the south because it is best for the cables when flipping.�� My telescope is 500 miles away so it needs to run perfect, which it does.



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#50235 Jan 6, 2016

I will add that I don.t use USB hubs for anything astronomy. In the warm room maybe for an external drive but nothing that could interfere with an imaging run. I.d rather add a PCIe USB card first but then I also don.t use laptops in the observatory. As it has a warm room I build the computer for my needs by adding serial ports and USB cards if needed. ��Steve ��From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] Sent: Wednesday, January 06, 2016 12:58 PMTo: ap-gto@yahoogroups.comSubject: RE: [ap-gto] Re: 2016 Park 1 Bug or Feature



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#50258 Jan 6, 2016

In answer to ... .well I agree but the telescope willnever be pointing south at 0 degrees above the ground so what is thepoint..�������� I have a .repeatable situation. that always points theOTA at the ground, by about 15 degrees BELOW 0 degrees. It is a real, strain onthe 16 foot cables.�������� I just watch carefully, just�� in case the APCC orkeypad, send the OTA to an even worse path, and finally snaps the lines. Therecan always be slew paths that make the mount travel .OTA pointing down.. Wishthe CPx firmware logic�� could avoid dipping the OTA below horizon.��Joe



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#50265 Jan 7, 2016

.. There can always be slew paths that make the mount travel .OTA pointing down.. Wish the CPxfirmware logic�� could avoid dipping the OTA below horizon.. ��To keep an OTA pointing above 0 deg. altitude through a slew, break the slew into two parts.������ Part 1 is to slew to Park 3 (you don.t need to actually park,just slew to HA ~�� +/- 6���� and Dec 89*59.)���� Part 2 is to slew to the target.���� The OTA will never dip down during this two-stage path.��

��It would be impractical to try to incorporate this into the CPx logic since it would be a waste of time for most slews, especially relatively short ones.������Only do this where needed, and do it manually.���� With APCC, you can have the Park 3 coords saved as one of your GoTos on the GoTo/Recal tab. ��Mag. 7 Skies! ��Howard HedlundAstro-Physics, Inc.Phone: 815-282-1513www.astro-physics.comPlease include this e-mail with your response. ��PConsider the environment before printing this e-mail. ��

��From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com]

Sent: Thursday, January 07, 2016 5:24 AM

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] Re: 2016 Park 1 Bug or Feature







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#50267 Jan 7, 2016

Well, there is a way, if you have absolute position. You monitor the position of each axis, and you use stops and starts to maneuver solely inside a boundary. Factory robotics use this strategy to stay in the safe zone. You can also use acceleration and different speeds to maintain a trajectory inside the safe zone without a stop. Basically, allowing one axis to move while one does not (or using speed to accomplish the same thing) allows you to only make moves in the safe zone, using a stepwise logic. Not too tough to implement if you use stops, a bit more interesting if you want to be able to move both at the same time.

Ron Wodaskirwodaski@...





On Jan 7, 2016, at 12:19 PM, Howard howard@... [ap-gto] ap-gto@yahoogroups.com> wrote:



.. There can always be slew paths that make the mount travel .OTA pointing down.. Wish the CPx firmware logic�� could avoid dipping the OTA below horizon.. ��To keep an OTA pointing above 0 deg. altitude through a slew, break the slew into two parts.������ Part 1 is to slew to Park 3 (you don.t need to actually park, just slew to HA ~�� +/- 6���� and Dec 89*59.)���� Part 2 is to slew to the target.���� The OTA will never dip down during this two-stage path.�� ��It would be impractical to try to incorporate this into the CPx logic since it would be a waste of time for most slews, especially relatively short ones.������ Only do this where needed, and do it manually.���� With APCC, you can have the Park 3 coords saved as one of your GoTos on the GoTo/Recal tab. ��Mag. 7 Skies! ��Howard HedlundAstro-Physics, Inc.Phone: 815-282-1513www.astro-physics.comPlease include this e-mail with your response. ��P��Consider the environment before printing this e-mail. ��



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#50268 Jan 7, 2016

Hi Howard,�������� Your alternative isn.t practical, since in my case theslew is to my Flats Screen from e.g. Park-2, which goes well, using my defined.dedicated coordinate.�� Park Alt-Az APCC command. But the return trip toPark-2 does the dip down, to get there. There are likely several othersituations. It.s a hassle.�������� I can only surmise that the dip down may actually be agood thing, since it raises the OTA tail high, giving the camera cable harness anice stretch to almost its length limit, and being high in the air (maybe)prevents the CCD from hitting some part of the pier or mount.��Joe��From: mailto:ap-gto@yahoogroups.comSent: Thursday, January 07, 2016 3:19 PMTo: ap-gto@yahoogroups.comSubject: RE: [ap-gto] Re: 2016 Park 1 Bug orFeature



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#50275 Jan 8, 2016

BobI bought mine from Monoprice (product # MC-UEC20M1). They offered a 100' (30M) version but I only went with the 20M version. Again, it has worked well for 3+ years.��

Don Anderson



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#50348 Jan 12, 2016

You'd be surprised!



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