enhancement : deactivate dec backlash compensation

[GoogleCodeExporter]

Some new  generation mount  (avalon , 10µ)
have nealy "zero" backlash in the two axes.
BUt it appears that during calibration there's a kind of
backlash  count.

I think it mess a lot the guiding efficiency on these mount.
An option of deactivating dec/ra backlash compensation/measurement
should be implemented.
For information PHD/PHD2 are so impossible to use with these mounts.
particulary with the dec axis , constantly overshooting.

Softs where you can suppress or setup the amount of backlash
acts ok : (metaguide/guidemaster)

Thanks.

Original issue reported on code.google.com by fdx92...@gmail.com on 8 Mar 2014 at 2:27

[GoogleCodeExporter]

Neither PHD or PHD2 have and sort of "backlash compensation". The only backlash 
awareness that they have is that they don't start counting DEC calibration 
steps until they have seen some movement to get the backlash out.

If your mount has almost no backlash, you might try selecting "Hysteresis"  for 
the Declination Algorithm on the Brain Box's Mount tab.  Then you can dial down 
the Aggression setting, which is used to avoid overshoot.

After trying that experiment, please let is know the results. If it works, we 
can look at adding an "Aggression" setting to the "Resist Switch" algorithm.

If it does not work, please attach a debug log from a session that shows the 
problems (extra credit for telling us the time when an overshoot happens). 

Original comment by br...@boneheads.us on 8 Mar 2014 at 2:41

[GoogleCodeExporter]

I am going to close this issue as "Invalid" since, as Bret said, PHD2 does not 
have backlash compensation and there is nothing to deactivate.

Let's look at your logs and discuss your overshoot problem in the discussion 
group. If we find a defect or potential enhancement we can enter a new ticket 
at that time when we have the information.

Original comment by andy.gal...@gmail.com on 10 Mar 2014 at 2:54

• Changed title: enhancement : deactivate dec backlash compensation
• Changed state: Invalid
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

Hi andy, i read  bret mail and i agree. i was confused by the dec clear 
backlash during calibration phase that occurs
on phd 1.
As you know phd2 is unstable on my computer, and we stiil need to launch 
a working debug version of phd 2 to sort out
this unstability. did you have some progress on that ?

Original comment by fdx92...@gmail.com on 10 Mar 2014 at 11:22