icefabio

2 hours ago, jif001 said:

Thanks for the feedback 👍🏻 I’d be interested to read any other threads on this subject if you can point me at them … there might be useful tweaks there!

This is a very detailed one: https://www.webastro.net/forums/topic/181159-test-eqm-35-pro/

F

On 06/06/2023 at 03:27, jif001 said:

Dec is now belt-modded following a Eureka! moment. This is how it went ...

@jif001 great job and great news!!

You are the only one who succeeded in this hack!  Everyone stopped at just changing the AR axis.

Thanks for sharing this simple and genious solution.

F

PS I recently bought EQStarPro otherwise I would have made this change too!

@jif001 many thanks for the explanation. Now I understand where I made a mistake!!  

1 hour ago, carastro said:

Lorenzo sometimes goes off the dark locations, so definitely worth chatting to him.  

i will do. Tks

19 minutes ago, carastro said:

There is another member on here from Rome.  Lorenzo Massimi perhaps you know him. 

No, I don't know Lorenzo but maybe I will have one more friend.

1 hour ago, saac said:

You will be challenged by a fair bit of light pollution in Rome but we also have some great imagers on the forum who image from London. You may be able to pick up and share some tips. 

Oh yes, that's a problem. I hope I can share my experiences.

2 minutes ago, Mike Q said:

Welcome to SGL from Ohio.  I visited Rome back in 1988, what a beautiful city 

Mike, many thanks!

I hope you will be able to come back here again!

F

Hi all!

just registered on this wonderful SGL community.

I do astrophotography from my home balcony in Rome.

This is my setup:

- SkyWatcher EQM-35 Pro with (soon) EQSTARPRO Belt Upgrade Kit
- Tecnosky 72/432 Apo (clone of TS Optics 72/432) with ZWO EAF Focuser
- ASI 294MC Pro
- Optolong L-Pro / L-Enhance Filters
- ASI224MC for Guiding
- ASIAir Pro

F

On 10/04/2023 at 00:41, jif001 said:

It was straightforward to establish the gear ratio on the RA train between the motor and the worm. There are four gears: the driving gear on the motor shaft (12 teeth); an idler gear driven by it (48 teeth); a coaxial gear rigidly attached to that (35 teeth); and finally, the driven gear attached to the worm (35 teeth) giving an overall gear ratio of 4:1.

[...]

The gear ratio on the Dec axis is 11:1 and I won’t be able to get that ratio with two pulleys unless one is the size of a dinner plate. Perhaps the solution is a similar arrangement to the one I now have on RA but with altered dec slewing and guiding rates set in EQMOD, so there may be some trial-and-error involved. Those commercial upgrades no doubt have pulse rates to match their small pulleys, but I can’t alter the stock motor controller. Any suggestions here would be welcomed.

[...]

Hi @jif001,

great job!!

what calculation should be done to find the ratios of the RA and DEC axis?

How did you get to 1:4 and 1:11 ratio?

Many tks

Fabio