Roland, Thank you for clarifying that. Yes, I understood that PE correction applies to the few arcseconds of sinusoidal like wiggle in the Ra. Dec drift, should be corrected by the model. I didn't see

Periodic error can be describes as speed bumps at regular intervals on the road. The PE curve measures those and applies the opposite movement so that the ride is smooth (and your head doesn't hit the

I pick a star near the zenith, slew and center it and hit recal. Then I press "flip scope" on the keypad and the star will be acquired on the opposite side. Any difference in RA direction will be 2

Hi Roland, Having had some sleep now (severely deprived) I see what you mean about the previous curve being better. A flatter curve to work with and then I use the model to correct for PA and other

Hi Ray, I believe I had it downloaded, will take a look at it. Thank you for the link (I was aware you have created quite a few software and contributed much to the community). -Rouz

Tom - Look up the ConeSharp program, from the SharpCap folks. Very easy to use, no need to use a specific star. Adjusters make life easier than shimming. Steve

Hi How does one adjust cone error if you have no view of the pole and use a camera? Thanks

Just got back from working on the scope. The large spur gear was too tight (thought I had checked it before finishing up yesterday...), took some force to turn. Loosened the bolts on

Stacey, That's great news! I am glad it was something you can correct without having to send in your CP5! -Ray

I use ACP Scheduler to run a robotic variable star program with a 900 mount unguided. Tracking in particular with the longer exposures sometimes required is problematic and substantially impacts

On Aug 19 Mr. Linwood posted some results comparing his new 1100AE mount to previous mounts that he owned. Below is his post, which might be informative to you:

Unfortunately that will make things worse and result in heavy oscillation. No software can counter a mechanical static friction, and will be really challenged by retrograde motion. There is no control

Hit sent too early! I did a dec tracking arc run last night via APPM and ASTAP, and it worked flawlessly except for in one camera configuration. I have an ASCOM camera, Orion 26mp Mono, and if I set

Hi Ray, I've got the problem solved. I went back out into the HOT observatory and the USB->serial connection to the CP5 worked! I'm not sure what the issue was earlier. I again tested my

Hi Tom can you upload the guidelog that you took these screen caps from? It sounds/looks like stiction to me Have you enabled auto backlash compensation in PHD? -- Brian Brian Valente portfolio

Your PE curve is PERFECT! DON'T change it. Rolando

You should have left the old curve in there. This new PE correction is NOT correcting for periodic error like the last one. It may have made it worse. Please think about what the PE correction does

Stacey, The reason I am asking is to test APCC's configuration. It's possible that both: 1) USB-serial port driver has an issue. 2) APCC is set up incorrectly. If could try this test: 1) Start the

The wrong direction is caused by very high friction somewhere in the geartrain. It's called retrograde motion and is caused by static friction which builds up and finally breaks loose. I suspect that

That looks perfect. No need for a new PEM curve. The PEM compensation is doing exactly as it should, it is removing the slight 2 arc sec wiggle in the RA tracking rate. Bottom line, the mount runs