Rolando, Thanks for the nearly immediate feedback! I will back off the RA a bit and keep an eye on the smoothness of the Dec motion and back off if needed Greg.

It's cheap and not very elegant, but you could always insert a couple of appropriately rated (for the max current available) silicon diodes in series with the power supply's output. Each one will

As some of you have already read, I sent my "bad" power supply to Christopher in Hawaii and it tested OK for him. He said it's quite warm, but otherwise OK. But I'm done with that one. It's

What you did for Dec will reduce the backlash, but don't be too aggressive. For RA I would leave a bit more clearance so that the gears run smooth. If they are too tight you may get slightly worse

I have experienced greater declination backlash from day one in my 1100GTO purchased new in December of 2015 than I would have anticipated. I have played around with adjusting the worm mesh using

Please post any response here so we can benefit from the information. Thanks Greg

You have e-mailed tech support and not gotten any response? Can you forward those e-mails to me: roland@.... I will pass them to the person in charge. You should be able to get an answer same

In PHD2 there's a check-box labeled "Enable mount guide output" on the Guiding tab of the Advanced settings window (click the brain button). You can leave your aggressiveness setting alone and just

Greg, Good to know I am not the only one experiencing this problem! I am seeing exactly the same behavior as you - the only difference is that I disconnected the USB cable before starting the

Will do. (waiting for stars). RA to 0. If I can't set 0. If I can't, I do not have a guide cable. I have a guide camera, USB to computer and I believe the guiding is then passed along through

I don't know what you mean by setting DEC to 0. What I said below was to set the guide aggressiveness in RA to zero in order to see what the actual periodic error is with PEM off. Then do the same

I don't know what you mean by setting DEC to 0. What I said below was to set the guide aggressiveness in RA to zero in order to see what the actual periodic error is with PEM off. Then do the same

Yes, it's normal to be some play when the altitude lever is loose. Always do the final altitude adjustment upward with a bit of tightness in the lever, then tighten it fully. Rolando

Hello All, Although my initial question was answered by Rolando while ago, I have a new concern related to altitude mechanism assembly. During my last session, I observed that the whole RA axis

thanks I'll try this next clear night. I did try to set DEC to 0 - as per your suggestion before but it wouldn't stick - it changed to 1 (is that ok?) You say do this for both axis then. Will do. I

I would still do it to minimize any error, regardless. Even with the encoder mount the star does not always come back exactly to the start position, sometimes it is off by 1 pixel as measured by the

Rolando, You mention moving the calibration start at least 150 arc-seconds to minimize the impact of DEC reversal. Does this apply to mounts with encoders, that in effect have no backlash? Eric C

No, disengaging the worm from the worm wheel does not change the PE corrections. I think you are grasping at straws. Please read my other post about polar alignment - try to get it as good as

Probably not related, but my part 2 never showed that it loaded, Just hung on the status bar. However, it showed later that it did in fact "take". CG

I've now had my 2nd night of stars since my Mach1 arrived. I wanted to concentrate on guiding (since that is why I upgraded from the NEQ6). I carefully balanced the scope. Calibrated (PHD2) near