The making of 30 in telescope - 38, altitude motor drive
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- 註冊時間: 週四 09 10月, 2003 21:06
The making of 30 in telescope - 38, altitude motor drive
Dear ATMs,
The altitude axis motor drive has just been finished and tested OK.
The drive consists of a motor and a gear to slow down the speed by four times. It is then coupled to a belt which drive a big pulley fixed onto the altitude bearing.
In order for the telescope to be movable by hand, a released mechanism is included in the drive. A wing –nut will engage the motor drive onto the altitude axis while tightening and upon loosening the same nut the motor drive be disengaged, making hand slewing of telescope possible.
The mechanical part of the slow motion drive has been finished. The next step will be the installation of the electronic control system for the two motors ( azimuth and altitude ).
Best regards
Chan Yuk Lun
8-3-2006
The altitude axis motor drive has just been finished and tested OK.
The drive consists of a motor and a gear to slow down the speed by four times. It is then coupled to a belt which drive a big pulley fixed onto the altitude bearing.
In order for the telescope to be movable by hand, a released mechanism is included in the drive. A wing –nut will engage the motor drive onto the altitude axis while tightening and upon loosening the same nut the motor drive be disengaged, making hand slewing of telescope possible.
The mechanical part of the slow motion drive has been finished. The next step will be the installation of the electronic control system for the two motors ( azimuth and altitude ).
Best regards
Chan Yuk Lun
8-3-2006
- 附加檔案
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- The altitude axis after installation of the motor drive.
- 30_65.jpg (52.5 KiB) 已瀏覽 10255 次
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- The altitude bearing before the installation of the motor drive.
- 30_57.jpg (137.39 KiB) 已瀏覽 10255 次
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- The altitude motor drive. It consists of a motor assembly and a big pulley. The big pulley is driven by a timing belt through a tooth-wheel driven by the motor.
- 30_64.jpg (50.31 KiB) 已瀏覽 10255 次
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
Dear Mr. Simonii,simonii 寫:Dear Chanlunlun,
Why don't you think about an EQ platform? Az-Alt is surely much easier to make compared with EQ platform, but it is much desirable to have EQ tracing in such a large and long focal length telescope.
cheers,
Simon
The volume and weight of an equatorial platform that could support a 30 inch telescope is too big. The platform is prohibitively too massive to be taken out to field. In addition an equatorial platform could only track for a short time, 45 minutes maximum.
Actually we'd made one equatorial platform for our 14 inch Newtonian, but seldom be used for its prohibitive volume. If we scale up the EQ platform to carry a 30 inch scope, It is unthinkable.
Alt-Az motors, on the other hand, are very tiny and add only one to two lbs to the total weight of the telescope, fully compactable with our "outdoor" policy. Last but not least they could track for unlimited time, all you need to do is just pressing some buttons, adding some fun to the long observation night.
Best regards
Chan Yuk Lun
- hunter_大祭司
- 紅巨星
- 文章: 416
- 註冊時間: 週二 01 3月, 2005 18:30
- 來自: 神的國度
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
Re: The making of 30 in telescope - 38, altitude motor drive
Dear Mr. Hunter,hunter_大祭司 寫:乜皮帶靠得住麼!?
This is not ordinary belt but what we call a "timing belt". It is a kind of belt used in precision machines such as exhaust valve timing in car engine, printer head in ink jet printer......etc.
It is very reliable. We tested it last night. The slow motion is functioning good, at least we enjoyed it in high power lunar observation. The telescope will go and stop to anywhere on the lunar surface we like, with just a press of button.
Best regards
Chan Yuk Lun
- hunter_大祭司
- 紅巨星
- 文章: 416
- 註冊時間: 週二 01 3月, 2005 18:30
- 來自: 神的國度
那麼假極的現像你們如何解決哦?Chanlunlun 寫:Dear Mr. Simonii,simonii 寫:Dear Chanlunlun,
Why don't you think about an EQ platform? Az-Alt is surely much easier to make compared with EQ platform, but it is much desirable to have EQ tracing in such a large and long focal length telescope.
cheers,
Simon
The volume and weight of an equatorial platform that could support a 30 inch telescope is too big. The platform is prohibitively too massive to be taken out to field. In addition an equatorial platform could only track for a short time, 45 minutes maximum.
Actually we'd made one equatorial platform for our 14 inch Newtonian, but seldom be used for its prohibitive volume. If we scale up the EQ platform to carry a 30 inch scope, It is unthinkable.
Alt-Az motors, on the other hand, are very tiny and add only one to two lbs to the total weight of the telescope, fully compactable with our "outdoor" policy. Last but not least they could track for unlimited time, all you need to do is just pressing some buttons, adding some fun to the long observation night.
Best regards
Chan Yuk Lun
- hunter_大祭司
- 紅巨星
- 文章: 416
- 註冊時間: 週二 01 3月, 2005 18:30
- 來自: 神的國度
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
Dear Mr. Hunter,hunter_大祭司 寫:唔影相?!有點兒浪費哦!
To me, under a real starry sky, with real extreme transperancy, the only value for a real big telescope is to LOOK THROUGH it.
It's a big pity that you just let the photons from the nebula, galaxies and distant stars not reaching your retina but onto the a lifeless surface of CCD.
I firmly belief that the glory of Heaven should be seen by our own eyes, directly.
Best regards
Chan Yuk Lun
- hunter_大祭司
- 紅巨星
- 文章: 416
- 註冊時間: 週二 01 3月, 2005 18:30
- 來自: 神的國度
哦......! 和興刀模29044322,可以幫你用氣體激光射出很完美的木樣(包括你所造的鏡台每一部分)收費很平...Chanlunlun 寫:Dear Mr. Hunter,hunter_大祭司 寫:唔影相?!有點兒浪費哦!
To me, under a real starry sky, with real extreme transperancy, the only value for a real big telescope is to LOOK THROUGH it.
It's a big pity that you just let the photons from the nebula, galaxies and distant stars not reaching your retina but onto the a lifeless surface of CCD.
I firmly belief that the glory of Heaven should be seen by our own eyes, directly.
Best regards
Chan Yuk Lun
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