Old 27-02-2019, 09:19 AM
Registered User

RyanJones is online now
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 693
HEQ5 pro belt mod

Hi all,

I'd like to do the belt drive modification to my HEQ5 Pro. When I've searched for it, the only one that seems to come up is the Rowan kit. Is this the only kit ? Is it the best kit ? And does anyone know where it can be sourced locally ? The first kits that come up are from Europe.

Thanks in advance for your help.
Reply With Quote
Old 27-02-2019, 10:48 AM
doppler's Avatar
doppler (Rick)
Registered User

doppler is offline
Join Date: Nov 2012
Location: Mackay
Posts: 1,478
Hi Ryan, I think that Rowan is the only one that makes the kit, I got mine straight from Rowan, reasonable postage and here in a week.


I did have a look at buying the individual parts but they are not that cheap and when you add the lot up the kit is a good price and ready to go. There is an optional pinion extractor tool, I got mine off easily by leaving the motors in and levering the gears off with two flat screwdrivers, one on each side of the gear.

Pretty easy mod and defiantly improves tracking.

Reply With Quote
Old 27-02-2019, 02:55 PM
traveller's Avatar
traveller (Bo)
Not enough time and money

traveller is offline
Join Date: Aug 2011
Location: Melbourne
Posts: 2,116
HEQ5 belts mods are much easier to do than EQ6 (which I did on mine).
you need to make sure there is adequate tension in the belts otherwise your tracking will suffer.
Reply With Quote
Old 27-02-2019, 08:29 PM
Registered User

RyanJones is online now
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 693
Thanks for the advice guys and Rick for the link.

I'm assuming once I've carried out the mod. I'll need to set my backlash settings to zero and readjust it. Is there anything else I would be doing post-mod to help ?
Reply With Quote
Old 04-03-2019, 08:28 PM
Paulyman (Paul)
Registered User

Paulyman is offline
Join Date: Nov 2017
Location: Unanderra
Posts: 86
My HEQ5 Pro came with really bad dec backlash which meant I had to guide in one direction only and very carefully balance camera heavy in dec. I had some weird 13.6s oscillations in ra that made guiding difficult and I tended to have an total rms of 1.5 to 2.

I just belt modded my HEQ5 Pro with the kit from Rowan, it was surprisingly easy the only hard part was getting the little gears off even with the pinion extractor. I finally got to test it on the weekend, on Saturday night the ra axis kept stalling so I had to bring it all in and play around with the tension in the belt. On Sunday night it worked like a dream, my total rms for nearly 8 hours across 3 targets was sub 1.5 all night, most times it was sub 1. My dec backlash is still pretty bad so I may have to play some more with the belt tension on that axis but I could guide it in both directions at least. The ra axis is running smooth as now.
Reply With Quote
Old 05-03-2019, 06:49 AM
kens (Ken)
Registered User

kens is offline
Join Date: Oct 2014
Location: Melbourne, Australia
Posts: 282
You also need to adjust the worm mesh and float in addition to belt tension.
Reply With Quote
Old 05-03-2019, 07:17 AM
bojan's Avatar

bojan is offline
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 5,797
You do not need to go with Rowan kit.

You can buy parts at Small parts or SDP-Si (for a fraction of Rowan's price).. they have belts with various number of teeth, you only have to specify the right sizes. Belt tension can be adjusted by slightly moving the motors.
Reply With Quote


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time is now 09:55 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
NexDome Observatories
OzScopes Authorised Dealer
Meade Australia
Celestron Australia
Lunatico Astronomical
SkyWatcher Australia
Astronomy and Electronics Centre