Date   

Re: Mach2 power consumption #Mach2GTO

Roland Christen
 

No need for the inverter unless you want to run the mount at 24 volts. Using an inverter wastes power, better to run at 12 volts directly. The mount is most efficient at 12 volts. Without the keypad plugged in it consumes about 14 watts at 12v, 15 watts at 18 volts and 16.6 watts at 24 volts. It is limited to 1200x slewing at 12 volts and 1800x above 18 volts.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Tue, May 26, 2020 11:20 am
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

Ok, now that raises a question for me.

While we do have 120V power at the observatory, it is unreliable [rural location, the utility sometimes shuts it off to prevent brush fires, a club member may not realize that I am on site and will shut down the sit power when they leave at 2am].  So, I have everything set up to run on 12v and if the power is interrupted, then everything immediately switches over to a 12v LiPO4 battery that is on standby [ http://www.westmountainradio.com/product_info.php?products_id=epic-pwrgate ].

It looks like I should be using a 12v to 120v inverter for the mount with the supplied 24v power supply plugged in... right?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 power consumption #Mach2GTO

Dean Jacobsen
 

Ok, now that raises a question for me.

While we do have 120V power at the observatory, it is unreliable [rural location, the utility sometimes shuts it off to prevent brush fires, a club member may not realize that I am on site and will shut down the sit power when they leave at 2am].  So, I have everything set up to run on 12v and if the power is interrupted, then everything immediately switches over to a 12v LiPO4 battery that is on standby [ http://www.westmountainradio.com/product_info.php?products_id=epic-pwrgate ].

It looks like I should be using a 12v to 120v inverter for the mount with the supplied 24v power supply plugged in... right?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Create a PEM curve with a camera?

Tom Blahovici
 

Hi . Does this mean that if I use an stl11000 that gives 3.6" that I should not bother?
Tom


Re: Why must DEC backlash be off in the ASCOM driver when guiding?

Tom Blahovici
 

Thanks. Full explanation.


Updating AP Ascom driver

Eduardo Oliveira
 

Hi There,

Can someone please give me instructions on how to update the AP ASCOM driver? If I update the driver, the configurations are kept? I heard someone saying something about a language setting issue with “.” or “,”. Can someone give me some directions?

Regards


Re: Mach2 power consumption #Mach2GTO

Roland Christen
 

How come you are not using the 24 volt power supply that comes with the mount? It is much more efficient than your Pyramid.

Rolando



-----Original Message-----
From: Jerome Allison <jallison@...>
To: main@ap-gto.groups.io
Sent: Mon, May 25, 2020 3:02 pm
Subject: [ap-gto] Mach2 power consumption #Mach2GTO

I'm wondering what other Mach2 users are experiencing with power usage with their mounts.  

Using a Powerwerx watt meter, I'm seeing about 1.05 amps at 13.8V while tracking, as much as 5.15 amps while slewing.  I'm powering with a Pyramid PS-15KX supply, and it gets hot.  (Still indoors due to lousy weather).

These motors are drawing a lot of juice!  Is that to be expected?

Jerome


Re: Mach2 power consumption #Mach2GTO

Roland Christen
 

Yes, that is correct. The mount powers both microsteppers with full current at all times. The Dec motor must be powered even when it is not turning in order to maintain an exact microstep positions. This is fundamental to microstep motors. Slewing both motors at 1800x draws the most power - the motors are beefy and rated at 2.7 amps each.

The motors can be powered at a lower level, but then you may run into stalls and/or resonance situations. If this is something that you would like a handle on, we can incorporate that into our next keypad feature list. However, care must be taken to carefully balance the load so that the motors will work within their lowered load capability at the lower current levels. We can never achieve the low current consumption of our earlier DC servo motors because they have very much higher efficiency than a stepper motor. Also the Dec motor on a DC servo doesn't draw any current when it is sitting still, whereas a microstepper must draw full current whether it is moving or not in order to maintain sub-arcsec positions.

Rolando



-----Original Message-----
From: Jerome Allison <jallison@...>
To: main@ap-gto.groups.io
Sent: Mon, May 25, 2020 3:02 pm
Subject: [ap-gto] Mach2 power consumption #Mach2GTO

I'm wondering what other Mach2 users are experiencing with power usage with their mounts.  

Using a Powerwerx watt meter, I'm seeing about 1.05 amps at 13.8V while tracking, as much as 5.15 amps while slewing.  I'm powering with a Pyramid PS-15KX supply, and it gets hot.  (Still indoors due to lousy weather).

These motors are drawing a lot of juice!  Is that to be expected?

Jerome


Re: Mach2 and PHD2 Guiding recommendations

Don Anderson
 

Nice clean installation Dean!
Congrats

Don Anderson


On Tuesday, May 26, 2020, 07:51:42 a.m. MDT, Dean Jacobsen <deanjacobsen@...> wrote:


A profile snapshot of the Mach2 waiting for its first night under the stars.

https://www.astrobin.com/yqzal0/
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 transport case

George
 

Dean,

 

Bottom of page 4…Mach2 Optional Parts.    It is the Pelican iM2875 Storm Travel case.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-282-1513

Email:  george@...

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Dean Jacobsen
Sent: Tuesday, May 26, 2020 9:56 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 transport case

 

Thanks but I haven't found it yet.  ;-)  I see the photo caption on page 2 that started me down this path but I haven't found the recommendation. 

Page number?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 transport case

Dean Jacobsen
 

Thanks but I haven't found it yet.  ;-)  I see the photo caption on page 2 that started me down this path but I haven't found the recommendation. 

Page number?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 and PHD2 Guiding recommendations

Roland Christen
 

Excellent.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Sun, May 24, 2020 10:29 am
Subject: Re: [ap-gto] Mach2 and PHD2 Guiding recommendations

On Tue, May 19, 2020 at 10:33 AM, uncarollo2 <chris1011@...> wrote:
It's really quite simple.
 
1) Set a delay of 2 to 3 seconds between guide exposures. No need to chase gear errors because there aren't any.
2) use whatever exposure time you want to get a good signal/noise ratio (usually from 1 to 5 seconds)
3) use Guiding assistant to gauge the seeing and set your MinMove to what is recommended.
4) depending on seeing, the aggressiveness can be set between 50% to 90%.
 
Be sure that your guide scope focal length is set properly in PHD2 in the scope setup window.
 
Then image away.
 
Rolando
OK, the Mach2 arrived Friday and I took a trip out to the observatory last night. 

Had been able to update my ASCOM/AP Driver/PHD2/SGP software and driver stack.  TheSkyX connects.  APCC Pro was set up and functioning.

No modeling or other fancy stuff yet.

Here is a segment of guiding after the sequence completed and there weren't any dithers for a while.


 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 transport case

George
 

Dean,

 

Reference the Mach2 manual.    There is a Pelican recommendation.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-282-1513

Email:  george@...

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Dean Jacobsen
Sent: Saturday, May 23, 2020 9:54 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Mach2 transport case

 

Has any one found a Pelican case or similar transport case with the same inside dimensions as the Mach2 shipping box?  I saw a suggestion in the manual that the shipping box's padding could be used in a transport case.  That seemed like a good idea.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Instruction Manual

abners@...
 

Hi,
Does anyone know where I can get instructional videos and also tips in general?
Any videos?

Thanks


Re: Mach2 and PHD2 Guiding recommendations

Dean Jacobsen
 

A profile snapshot of the Mach2 waiting for its first night under the stars.

https://www.astrobin.com/yqzal0/
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: AP Driver error

Max Mirot
 

Thanks


Re: Mach2 power consumption #Mach2GTO

Terri Zittritsch
 

On Mon, May 25, 2020 at 04:02 PM, Jerome Allison wrote:
I'm wondering what other Mach2 users are experiencing with power usage with their mounts.  

Using a Powerwerx watt meter, I'm seeing about 1.05 amps at 13.8V while tracking, as much as 5.15 amps while slewing.  I'm powering with a Pyramid PS-15KX supply, and it gets hot.  (Still indoors due to lousy weather).

These motors are drawing a lot of juice!  Is that to be expected?
I checked out mine early on as well, and found that its current draw higher than the specs, at 12V, but was dealing with other things so haven't fed back the numbers.   I haven't paid a lot of attention to the 18V current numbers, which should be lower, because while it's plugged in I have all the juice that I need.   

Terri



Re: AP Driver error

Ray Gralak
 

Max,

The driver can report Latitude, Longitude, Altitude, Azimuth, etc. and is ASCOM conformant so it's not clear what Voyager is asking for. I don't use that application so maybe someone else will have another suggestion.

Also, if you are using APCC you might try downloading and installing the new build I just posted.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Max Mirot via groups.io
Sent: Monday, May 25, 2020 9:08 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP Driver error

I installed the latest driver. It did not help with this problem.


Re: Mach2 power consumption #Mach2GTO

Christopher Erickson
 

Microstepping means that the steppers must always be under power. Full steps can sometimes mean you can put the motor to sleep. Especially when using worm drives off of the stepper.


On Mon, May 25, 2020 at 5:02 PM Jerome Allison <jallison@...> wrote:
Thanks, Christopher.  I kind of forgot about stepper motors and their holding/stepping power requirements.  I made an Arduino based stepper focuser system a couple years ago and programmed it to sleep after twenty seconds, just so it wouldn't use a lot of power for hours on end. :)  
Jerome


Re: Why must DEC backlash be off in the ASCOM driver when guiding?

Worsel
 

Tom

See what PHD2 says about why it is best to disable backlash compensation settings in the mount.

https://openphdguiding.org/manual/?section=Advanced_settings.htm#Algorithms_Tab

Bryan


Re: AP Driver error

Max Mirot
 

I installed the latest driver. It did not help with this problem.

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