Re: [tec-scopes] FocusMax issues


Jan 14, 2012

 


----------------------------

#21560 Jan 14, 2012

Hi folks,



after a few months of inactivity, this Christmas I've taken the opportunity once again to enjoy my wonderful TEC140 scope and try to image a bit. While the scope keeps performing as a winner (I don't need to tell you about how *excelent* these TEC machines are, we all know that), I have found some problems trying to make the mothorized FeatherTouch 3545 with Focusmax. Maybe somebody here can provide some help or experience about that.



The fact is that when I connect the focuser to FocusMax, it complains it can not automatically focus, so it makes me run the wizzard to calibrate the thing. But when it starts with the calibration and the V-curve buildup, it seems to move the focuser in only one direction, which turns out to be the opposite of the requied one. MaximDL shows pictures of the star choosen for fucus calibration, and it keep defocusing and defocusing instead of focusing. At the end of the run I end up with a big defocussed ball and no calibration at all.

I thought it could be that I was starting too far away from the actual focus, but this is not the case. I've tried to accurately focus by hand and then run the thing, but still the same problems.



Anybody here could please provide some help about that?

Of course I can focus with the manual hand controller, but the idea was to make all that automatic.



Thanks a lot,



Ferran.



----------------------------

#21561 Jan 14, 2012

Hi,

Well, sometimes it takes some tweaking of the settings.

Which focus motor system are you using?

Floyd

--- In tec-scopes@yahoogroups.com, "ferranmazzanti" Ferran.Mazzanti@...> wrote:

>

> Hi folks,

>

> after a few months of inactivity, this Christmas I've taken the opportunity once again to enjoy my wonderful TEC140 scope and try to image a bit. While the scope keeps performing as a winner (I don't need to tell you about how *excelent* these TEC machines are, we all know that), I have found some problems trying to make the mothorized FeatherTouch 3545 with Focusmax. Maybe somebody here can provide some help or experience about that.

>

> The fact is that when I connect the focuser to FocusMax, it complains it can not automatically focus, so it makes me run the wizzard to calibrate the thing. But when it starts with the calibration and the V-curve buildup, it seems to move the focuser in only one direction, which turns out to be the opposite of the requied one. MaximDL shows pictures of the star choosen for fucus calibration, and it keep defocusing and defocusing instead of focusing. At the end of the run I end up with a big defocussed ball and no calibration at all.

> I thought it could be that I was starting too far away from the actual focus, but this is not the case. I've tried to accurately focus by hand and then run the thing, but still the same problems.

>

> Anybody here could please provide some help about that?

> Of course I can focus with the manual hand controller, but the idea was to make all that automatic.

>

> Thanks a lot,

>

> Ferran.

>



----------------------------

#21562 Jan 14, 2012

It's been a long time with that combo but isn't there an option of clockwise in/ counter out?  You could have it backwards on the FocusMax driver.



--Jeffrey---------------Jeffrey A. Steinberg914-374-7503



----------------------------

#21566 Jan 15, 2012

Hi Ferran,



I use FocusMax, CCDSoft V5, my TEC140/TecFF/STL-4020 and the FeatherTouch

motor. It took me also some time to figure out how best to do the

calibration with FocusMax: check that the values in the FT Ascom driver are

correct, I suppose you chose FTF3545 which gives Max Total Focus Travel of

15714, Max Focus Travel per move 15714, Step Size 7,28, Resolution Fine,

Reverse in-out NOT checked, I have Do not Calibrate Zero Point on Power Up

checked and Backlash = 1 step.

In FocusMax, first use the Jog function to establish aproximate best focus

manually, starting the focuser from the 0 position. Don't use the numbers on

the FeatherTouch controller, these values are not the same as in FocusMax.

In the FocusMax Setup tab I have set Near Focus HFD 10, Exposures 7, Move

out checked, Autofocus frame width 300 Bin 1 Exp 0.11. Focus Start is the

value you found when focussing manually, there I have set HFD 20 and Use

Position.

On the VCurve Tab, you have the choice of using a Vcurve with Start and Stop

position which you could set at -100 to +100 with respect of the focus

position (e.g. in my case best focus is around 8600, then I would set a

start at 8500 and end at 8700 and you set the amount of steps between the

two values, e.g. 10). Or you can also select Half Width, Center=best focus

position and Halfwidth = 100 and then do the Vcurve. Make sure the focuser

is at the 0 point (fully in) when starting FocusMax, then with the Jog

function go to the focus point you found and start Vcurve. Once the Vcurve

profile is established, save it, do a focus run and adjust the focus number

on the setup tab. Next time, when starting FocusMax, focuser at 0, just hit

focus and it should move to the established focus point and make its focus

run.



Best regards,



Geert Vdbulcke

Belgium



-----Oorspronkelijk bericht-----

Van: tec-scopes@yahoogroups.com [mailto:tec-scopes@yahoogroups.com] Namens

ferranmazzanti

Verzonden: zaterdag 14 januari 2012 10:48

Aan: tec-scopes@yahoogroups.com

Onderwerp: [tec-scopes] FocusMax issues



Hi folks,



after a few months of inactivity, this Christmas I've taken the opportunity

once again to enjoy my wonderful TEC140 scope and try to image a bit. While

the scope keeps performing as a winner (I don't need to tell you about how

*excelent* these TEC machines are, we all know that), I have found some

problems trying to make the mothorized FeatherTouch 3545 with Focusmax.

Maybe somebody here can provide some help or experience about that.



The fact is that when I connect the focuser to FocusMax, it complains it can

not automatically focus, so it makes me run the wizzard to calibrate the

thing. But when it starts with the calibration and the V-curve buildup, it

seems to move the focuser in only one direction, which turns out to be the

opposite of the requied one. MaximDL shows pictures of the star choosen for

fucus calibration, and it keep defocusing and defocusing instead of

focusing. At the end of the run I end up with a big defocussed ball and no

calibration at all.

I thought it could be that I was starting too far away from the actual

focus, but this is not the case. I've tried to accurately focus by hand and

then run the thing, but still the same problems.



Anybody here could please provide some help about that?

Of course I can focus with the manual hand controller, but the idea was to

make all that automatic.



Thanks a lot,



Ferran.







---------------



Yahoo! Groups Links







----------------------------

#21569 Jan 16, 2012

Ferran, The shaft is slipping inside the 3545, the nut needs to be tightened and/or the sping inside needs to be changed. You are better off with a robofocus motor and bracket from AP, or wait for the new TEC electric focuser.  

From: ferranmazzanti Ferran.Mazzanti@...> To: tec-scopes@yahoogroups.com Sent: Saturday, January 14, 2012 4:48 AM Subject: [tec-scopes] FocusMax issues

Hi folks,

after a few months of inactivity, this Christmas I've taken the opportunity once again to enjoy my wonderful TEC140 scope and try to image a bit. While the scope keeps performing as a winner (I don't need to tell you about how *excelent* these TEC machines are, we all know that), I have found some problems trying to make the mothorized FeatherTouch 3545 with Focusmax. Maybe somebody here can provide some help or experience about that.

The fact is that when I connect the focuser to FocusMax, it complains it can not automatically focus, so it makes me run the wizzard to calibrate the thing. But when it starts with the calibration and the V-curve buildup, it seems to move the focuser in only one direction, which turns out to be the opposite of the requied one. MaximDL shows pictures of the star choosen for fucus calibration, and it keep defocusing and defocusing instead of focusing. At the end of the run I end up with a bigdefocussed ball and no calibration at all.I thought it could be that I was starting too far away from the actual focus, but this is not the case. I've tried to accurately focus by hand and then run the thing, but still the same problems.

Anybody here could please provide some help about that?Of course I can focus with the manual hand controller, but the idea was to make all that automatic.

Thanks a lot,

Ferran.



---------------

Yahoo! Groups Links

*> To visit your group on the web, go to:    groups.yahoo.com/group/tec-scopes/

*> Your email settings:    Individual Email | Traditional

*> To change settings online go to:    groups.yahoo.com/group/tec-scopes/join    (Yahoo! ID required)

*>To change settings via email:    tec-scopes-digest@yahoogroups.com     tec-scopes-fullfeatured@yahoogroups.com

*> To unsubscribe from this group, send an email to:    tec-scopes-unsubscribe@yahoogroups.com

*> Your use of Yahoo! Groups is subject to:    docs.yahoo.com/info/terms/



----------------------------

#21572 Jan 16, 2012

Ferran,  I should have added this is a known issue with the FT motorized focuser.  To test this first see if you can successfully move the focuser from the focus until you get a HFD of 40. Record the number of stepsGo back and fourth a number a few times, if you find that you are loosing your focus at the focus position that you previously recorded, then for sure this is your problem.

From: Tim Khan timkhan@...> To: "tec-scopes@yahoogroups.com" tec-scopes@yahoogroups.com> Sent: Monday, January 16, 2012 8:30 AM Subject: Re: [tec-scopes] FocusMax issues

Ferran, The shaft is slipping inside the 3545, the nut needs to be tightened and/or the sping inside needs to be changed. You are better off with a robofocus motor and bracket from AP, or wait for the new TEC electric focuser.  

From: ferranmazzanti Ferran.Mazzanti@...> To: tec-scopes@yahoogroups.com Sent: Saturday, January 14, 2012 4:48 AM Subject: [tec-scopes] FocusMax issues

Hi folks,

after a few months of inactivity, this Christmas I've taken the opportunity once again to enjoy my wonderful TEC140 scope and try to image a bit. While the scope keeps performing as a winner (I don't need to tell you about how *excelent* these TEC machines are, we all know that), I have found some problems trying to make the mothorized FeatherTouch 3545 with Focusmax. Maybe somebody here can provide some help or experience about that.

The fact is that when I connect the focuser to FocusMax, it complains it can not automatically focus, so it makes me run the wizzard to calibrate the thing. But when it starts with the calibration and the V-curve buildup, it seems to move the focuser in only one direction, which turns out to be the opposite of the requied one. MaximDL shows pictures of the star choosen for fucus calibration, and it keep defocusing and defocusing instead of focusing. At the end of the run I end up with a bigdefocussed ball and no calibration at all.I thought it could be that I was starting too far away from the actual focus, but this is not the case. I've tried to accurately focus by hand and then run the thing, but still the same problems.

Anybody here could please provide some help about that?Of course I can focus with the manual hand controller, but the idea was to make all that automatic.

Thanks a lot,

Ferran.



---------------

Yahoo! Groups Links

*> To visit your group on the web, go to:    groups.yahoo.com/group/tec-scopes/

*> Your email settings:    Individual Email | Traditional

*> To change settings online go to:    groups.yahoo.com/group/tec-scopes/join    (Yahoo! IDrequired)

*>To change settings via email:    tec-scopes-digest@yahoogroups.com     tec-scopes-fullfeatured@yahoogroups.com

*> To unsubscribe from this group, send an email to:    tec-scopes-unsubscribe@yahoogroups.com

*> Your use of Yahoo! Groups is subject to:    docs.yahoo.com/info/terms/


S
e
n
i
o
r
T
u
b
e
.
o
r
g