JayMS

Here is the summary on my issue. 1. Goto deviation on APT was settled down by 3 stars alignment and SYNC process. 2. Goto deviation on Stellarium came from wrong mount set up of Telescope control plug-in in Stellarium, in addition to Stellariumscope Mount property and Stellarium Location infomation. This was solved by following procedure. - Click on the Telescope icon in the pop up try at the bottom of the Stellarium window. - A small window will open. Click on Configure Telescope. - Another window will open, next to the Connect button there are 3 other buttons. The middle button "Add new Telescope" select ASCOM. (My previous selection was Stellarium, serial port option.) - Next go to the wrench button to set up the scope, the ASCOM chooser is near the bottom of this page. From there I can find Temma driver. Thanks.

I see. I will check one by one to narrow the scope. Thanks.

To perform GoTo function this mount need a computerized application like Synscan of Sky-watcher, while it can be SkyX, AsiAir, APT etc. where APT has more functions like Photography, Plate Solving etc. Thanks.

Hi Cosmic, Takahashi EM11 Temma2 Jr's hand controller only has a simple function to slew in RA and DEC direction, so without the computer connection there is no way to perform GOTO. If you intend that "the mount works properly" means "Slew in RA and DEC direction as I want", Yes it does. I meant that SYNC is to press a SYNC button of APT gear tap menu in order to match the current position of the mount with internal coordinate for the designated object.

Hi Davew, First of all I'd like to appreciate your detail comments. Last night I did three star alignment with SYNC like your comments, as I described in reply message to Cosmic. Question. Is it O.K. to adjust it manually instead of using hand controller in order to make the star centered? It's not easy for me to navigate on RA and DEC using hand controller. Do you think that to do Sync right after PA made impact to goto the first star correctly, because this time anyway the first goto was successful after that. And any idea why Goto M31 after M33 failed even after three star alignment and successful goto M33? Thanks for your kind help, James

Hi Cosmic Geoff, Thanks for your guide. Last night I did three star alignment with sync. This time I did Sync right after PA, and first goto Deneb worked well which was different from the previous and did the first Sync in APT. But second goto Altair deviated much, so I made it centered by hand controller which was time consuming, quite annoying but good experience for naviagation control :) and did the second Sync in APT. And third goto Vega also deviated less much, so I did same thing to make it centered and did the third Sync in APT. And I went back to Home position/NCP to test goto at the starting point. And goto M33 after the successful retrying of 3 stars alignment, at last M33 was centered through plate solving process of Pointcraft. I was so happy to realize my mount is fine. But one thing remained to solve. After some test shooting of M33, I tried to goto M31 which is near, but it went to a wrong direction so I stopped the mount compulsorily. So for the initialization I turned off and restarted all. And tried to goto M33 again, this time it worked well. I don't know why it happened. Can this kind of thing happen sometimes? Anyway I made a good progress. I'd like to appreciate your advise. Best regards, James

@Steve Ward @teoria_del_big_bang To Steve, I can't find a place to put in such information Tme/Time Zone etc. Where is it? In the mount property box, there is no place for them. I am not sure, It varied depending on the target.

@Stuart1971 Big deviation to the target after goto, which might cause the pointcraft failure. I'd like to know what I did wrong, and what I have to do to slew to the target exactly.

Hi, At last, I bought Takahashi EM11 Temma2 Jr which is famous for one of the best equatorial mounts. But I have a little worry about its age Through the test I've found that even the slew speed of mount is quite slow, but it's quite stable and other operations such as azimuth and altitude adjustment for polar alignment, focus control is very smooth. I could feel more than one level higher, comparing to the previous light mount with 5kg payload. In general I am very satisfied except one thing. Here are what I did at last night: After polar aligning using SharpCap & guide camera only with the mount power-off, the mount positioned toward NCP apparently. And I turned on the mount to recognize this position to NCP as the home position. And then I executed ATP and Stellarium, I tried to slew to famous stars to focus more accurately. However when I executed the goto to an object in APT and Stellarium such as Deneb, Vega etc, the destination always deviated to the target quite far away even though I'd correctly entered required information for latitude, longitude,altitude in the mount property at the begining. Attached files are related to this; (After polar aligning using SharpCap & guide camera with the mount power-off, the mount positioned toward NCP apparently.) For test purpose I just tried to do goto to Polaris/NCP using Stellaruim (Find Polaris and press down ctr+1), however strangely the mount started to move and located to other position in right below corner. I attached relevant pictures - Pic 1. Mount property setting at connection - Pic 2. Actual telescope location right after polar aligning, shown in Stellarium (You can find the telescope location in left upper corner) - Pic 3. After goto Polaris for test, Stellarium showed the telescope location was same as Polaris, but actual positioning of real mount went toward around M31 right below of Polaris. Please advise me why it happened and what I have to do to solve this problem. Best regards, James