Go Back   IceInSpace > Equipment > Equipment Discussions

Reply
 
Thread Tools Rate Thread
  #1  
Old 25-03-2019, 08:42 AM
brenchen
Registered User

brenchen is offline
 
Join Date: Jan 2018
Posts: 25
Mount motor stalling and hypertuning service in Brisbane?

I've had a problem with the Dec motor on my AZ-EQ6 stalling carrying only 15kg of well-balanced payload. And I was adviced to get it hypertuned.

If in fact that is true, is there anyone in Brisbane/Gold Coast area that will be able to hypertune my mount? If there is no professional service to get it done, I'm happy to pay whomever that can help me get it done Thanks.
Reply With Quote
  #2  
Old 25-03-2019, 08:45 AM
Bart's Avatar
Bart
Don't have a cow, Man!

Bart is offline
 
Join Date: Apr 2013
Location: Adelaide, South Australia
Posts: 722
You may not need a hypertune. It may be as simple as adjusting the backlash in the worm drive. Are you a member of an Astronomical Society? Is there a Technical Officer that could help?
Reply With Quote
  #3  
Old 25-03-2019, 09:52 AM
xelasnave's Avatar
xelasnave
Gravity does not Suck

xelasnave is offline
 
Join Date: Mar 2005
Location: Tabulam
Posts: 12,784
Check your power supply also.
I seem to recall I had a similar issue many years ago and it turned out to be powere related.
Alex
Reply With Quote
  #4  
Old 25-03-2019, 09:58 AM
xelasnave's Avatar
xelasnave
Gravity does not Suck

xelasnave is offline
 
Join Date: Mar 2005
Location: Tabulam
Posts: 12,784
Also maybe the main axis is a little too tight so maybe try backing things off a half or quarter turn. ..actually I bet that is the problem...cause after reassembling my eq6 the dec wont move very well...I had forgotten cause I move the mount manually and dont worry about dec at all really☺ for guiding as I have not set up for auto guide on that mount...mmm I must do what I suggest you do☺
Alex
Reply With Quote
  #5  
Old 27-03-2019, 08:05 AM
Wavytone (Nick)
BigBanger

Wavytone is offline
 
Join Date: Jul 2008
Location: Killara, Sydney
Posts: 3,994
Hi brenchen I have an AZEQ6 and my scope with the usual bits is also 15kg. My first guess is you are trying to power it from an AC mains power pack which is inadequate.

The! possible causes of the motor stalling are as follows:

1. The power supply is inadequate, and I’ve seen noobs make this mistake by trying to power it off the AC mains power adapter ... this will seem to work.. until it slews - the mount can draw 4A and it really needs to be powered from a decent SLA or LiPo battery. The point here is the rating of the wall wart is inadequate and the wiring too thin for the peak current so the voltage available to the motors drops and the result is reduced torque - and it stalls. Faced with buying yet another and some heavier cable, I’d suggest bite the bullet and get a 9AH or 12AH SLA battery which is what it really needs.

Since then I have found a 4A power pack (different application - a 00 electric train set) and it is quite big and heavy and cost as much as a decent battery.

Alternatively ask an auto electrician for a secondhand (used) car battery, while no good for a car, you can usually bag one for free and they’re overkill to run a scope.

2. In trying to reduce backlash, the worm has been adjusted too tight against the worm wheel; an adjustment will fix this. Note with these mounts there’s is always a little backlash so the cure for that is to have it ever so slightly unbalanced...

3. But if the mount is grossly unbalanced it will stall in one direction... you fix...
Reply With Quote
Reply

Bookmarks

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 02:13 PM.

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