I've been looking for a while to purchase a new mount for my Mewlon 250, and wanted to find one that would not be too heavy. The iOptron IEQ 45 pro seemed perfect in this regard, with an admissible payload of 20kg, as the mewlon fully equiped (diagonal, binoviewer; tube counterweight) weights around 15kg. I read a lot about this mount on the forum and decided to purchase one.
I mainly use my mewlon for planetary and lunar work (visual and images).
The mount arrived 2 weeks ago. It is beautiful and quite sturdy and pairs well with the Mewlon 250.
It is very easy to use and the goto works well as long as I perform some 3 stars alignment, so I overall like it a lot.
But I have a problem that I can't solve : Whis moderate to high magnifications, (200, 300x) I observe a periodic pulse in the image at a frequency of 1.2Hz. The amplitude is quite low, but sufficient to soften the image, washing out very fine planetary details. This pulse is coupled with some sort of small ticks coming from the motors.
It is not a balancing issue, the scope is perfectly balanced in both RA (using the electronic balancing procedure with the HC) and DEC (done manually by adjusting the dovetail and using the Mewlon 250 counterweight).
I tried to add some pads under the tripod, but it changed nothing.
So, if some of you have the same mount as me, I would be interested to know if you noticed the same thing, and if you can hear those 1.2Hz ticks in the motors.
And finaly, what do you think can be done to solve that issue ?
Edited by tegea, 17 July 2017 - 04:45 PM.