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Undersampled guiding can certainly result in worse tracking performance. Usually it will not result in a continuous star drift on the main imager but can result in bloated stars and sometimes,

One more question: Is the guide star somewhere in this field of view of the main camera? -Les

Those are some serious star trails. A couple more questions: Are those star trails north-south, or east-west? That is, is it trailing in declination or in RA? How good is the DEC balance? With the

I live in the northeastern US and am a G11 owner. ...I image with a 1000mm f/l scope and use 400mm for tracking, with a? ratio of 2.5, typically getting RMS values under 0.5 and with good seeing,

Very good thinking, Les! I will see if the PC DEC slew works properly. Best, Michael

Why not, Peter? If your guide scope guiding is not showing any large errors and the main imager shows constant drift, this is most likely differential flexure. Other possibilities include differential

Ooops this is a G2 – in which case a burnt out motor control PIC. Sent: 08 August 2021 16:23 To: '[email protected]' <[email protected]> Subject: RE: [Losmandy_users_io] Gemini-2

Most likely a burnt out PAL decoder for the Dec channel – you need to program it of course. Sent: 08 August 2021 15:24 To: [email protected] Subject: Re: [Losmandy_users_io] Gemini-2

Hi David, You adjust the back off bolt so that the worm friction drops to it's minimum. That is, you want the worm to just *lose* contact with the worm wheel gear it is driving. If you are adjusting

The next obvious guess would be resoldering the hand controller socket. Then start tracing the HC signals to look for something gone wrong. This would be easiest if you have a good board to do an A/B

Just one more little thing. Before I even touched my mount, I made sure I had a complete understanding of what the factory settings were. I wanted to make sure I had a reference point to refer to when

I have seen the new "milled down" (front or back full side) with the milled down bottom stud (aka "nipple") only on new SLW (spring loaded worm) drives. Earlier wirm blocks were completely black

David, I drilled and made my pivot hole larger. Most folks with new mount probably will not want to do that. Peter

The blocks evidently have changed. This must be due to the change over to the spring-loaded worm. I ordered a set of extra blocks when I did the Belleville washer modification, in case I needed them

Hi gang! I received John's questionable G2 mini board, to test it out. Symptoms: It boots up fine. It slews to an Align Bright Star target fine. If you press the RA diamond East West button it slews

Was the board repaired at Losmandy? ?From experience a runaway flew is a bad motor socket solder join. The ICs used are mostly capable of ?minus 20C. ?All ICs were chosen to suit this wide temp

Update: this hasn't happened at all in the past couple months. Theory: this is temperature related. Question: I think I read someone mention (maybe in this thread?) that cold temps does make this more

Here is a run down on the problem. 1. It occurred after changing out the Ra axis thrust bearings. 2. Polar alignment is via Sharpcap and was bang on at CDW. Just installed the NINA 3-point polar

Michael, Since Peter is in the UK (I think), Sagittarius must be pretty low in attitude (20 degrees?), even as it crosses the meridian. That's a lot of air to see through, so could this be more

That was my thinking, too. The symptoms really fit differential flexure. My back-of-the-envelope calculates that even a pretty loose polar shaft shouldn’t have more than several arc-minutes of slop,