Switching off backlash compensation

[StuartT]

I’ve been watching a video by the authors of PHD2 where they say you should disable backlash compensation in the mount and let PHD2 handle backlash instead.

how would I do that in an EQ6R?

[scotty38]

It'll be in EQMOD or GS Server. GS server:

[Stuart1971]

35 minutes ago, StuartT said:

I’ve been watching a video by the authors of PHD2 where they say you should disable backlash compensation in the mount and let PHD2 handle backlash instead.

how would I do that in an EQ6R?

Another option, which I do, is to guide on DEC in one direction only, this makes the DEC backlash issue moot, so my PA is about 3 arc mins out, so I watched to see which way the DEC drifts without guiding on, and set it to guide just in the opposite direction, so no swapping from one to another so no backlash issue, it works extremely well with mounds with DEC backlash which my EQ8 has 3200ms of….

[StuartT]

12 minutes ago, Stuart1971 said:

Another option, which I do, is to guide on DEC in one direction only, this makes the DEC backlash issue moot, so my PA is about 3 arc mins out, so I watched to see which way the DEC drifts without guiding on, and set it to guide just in the opposite direction, so no swapping from one to another so no backlash issue, it works extremely well with mounds with DEC backlash which my EQ8 has 3200ms of….

ok. Is this a setting in PHD2?

In the same video I mentioned above, the PHD2 author guy said that guiding is actually improved by a worse PA! So it's really not worth obsessing over PA too much. (usually I get my PA down to a minute or two, then leave it. Life's too short).

[Stuart1971]

2 minutes ago, StuartT said:

ok. Is this a setting in PHD2?

In the same video I mentioned above, the PHD2 author guy said that guiding is actually improved by a worse PA! So it's really not worth obsessing over PA too much. (usually I get my PA down to a minute or two, then leave it. Life's too short).

Yes, under the graph at the right hand end you will see a drop down box, which has three settings, the default is Auto, and you also have North only or south only, so if it drifted north after a few min test, then you select south, but you have to swap it round after a flip.

[StuartT]

17 hours ago, Stuart1971 said:

Yes, under the graph at the right hand end you will see a drop down box, which has three settings, the default is Auto, 

Sorry, but I don't see a drop down under the graph. 

[alacant]

On 21/03/2022 at 19:03, StuartT said:

how would I do that in an EQ6R?

 

On GS as @scotty38

On indi-eqmod, in the Telescope control panel, here:

On a windows box running eqascom, here:

 

Edited March 23, 2022 by alacant

[Stuart1971]

4 hours ago, StuartT said:

Sorry, but I don't see a drop down under the graph. 

You have not got the settings set to show…

[Stuart1971]

You can set your backlash comp, in PHD2, no need to set it In The driver 👍🏼

[alacant]

43 minutes ago, Stuart1971 said:

You can set your backlash comp, in PHD2

Hi

The OP was asking how to disable backlash compensation in the mount. This is a prerequisite before setting up the PHD2 algorithm. 

Cheers

[Stuart1971]

5 minutes ago, alacant said:

Hi

The OP was asking how to disable backlash compensation in the mount. This is a prerequisite before setting up the PHD2 algorithm. 

Cheers

Ok, sorry, my bad…👍🏼

[StuartT]

thanks all! I did it as @alacant suggested in EQMOD.

Second night of guiding last night and I was getting a fairly steady 0.75" with RA and Dec roughly equal.

😎

Here is the result https://www.astrobin.com/s24a6c/B/

Edited March 23, 2022 by StuartT