Date   

Re: Hanging case for GTOCP4?

Roland Christen
 


Kinda sounds like true class A power amplifier operation in my Hi-Fi hobby.  The output devices are always "on", at full current.  They run at their hottest with no signal and need a ton of heat sinks and you never enclose them.
I think you are mixing apples and oranges. Massive heatsinks are not required on our CP controllers.

Microstepper servos need current to hold position, otherwise the rotor falls back to one of the magnetic positions. All AC servo motors have this requirement. DC servos do not need to hold position and current falls to zero when not moving. Dc servos also have large gear reductions so they can operate at very low current levels and still produce plenty of torque at the worm shaft. Typical gear reduction of a Dc servo is around 60:1, whereas AC servos such as used on the Mach2 have reduction ratio of 2:1 or thereabouts.

Dc servos require very expensive gearboxes and expensive DC servomotors, otherwise the periodic error gets ragged and massive. They also make audible noise that people don't like. For the Mach2 we decided to use AC servos with belt drive so that we could apply the savings to add the very expensive Renishaw absolute encoders. With DC, the cost would have put us out of contention with competitive mounts. Plus people would have ragged about the slewing noise.

Rolando


-----Original Message-----
From: Jeff B <mnebula946@...>
To: main@ap-gto.groups.io
Sent: Sun, Jan 3, 2021 12:04 pm
Subject: Re: [ap-gto] Hanging case for GTOCP4?

Kinda sounds like true class A power amplifier operation in my Hi-Fi hobby.  The output devices are always "on", at full current.  They run at their hottest with no signal and need a ton of heat sinks and you never enclose them.

Ignorant but curious, since absolute encoders know where they are all the time, can a model be built by manually pointing the scope, without any goto commands?

Jeff

On Sun, Jan 3, 2021 at 12:23 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
On the CP5 controllers I would advise against putting them inside a cloth bag. The CP3 and CP4 are ok because they do not produce very much current for the two servo motors under normal tracking conditions. The CP5 sends full current to both stepper servos all the time, even when they are not moving, so the drivers are at full power and produce more heat. The case dissipates the heat to the surrounding air just fine, but if they are inside a cloth bag, they will not have any air circulation.

Roland Christen
Astro-Physics Inc.


-----Original Message-----
From: Dale Ghent <daleg@...>
To: main@ap-gto.groups.io
Sent: Sun, Jan 3, 2021 10:58 am
Subject: Re: [ap-gto] Hanging case for GTOCP4?

With the mounting bracket, you only have to losen two thumb screws and tip the unit forward to remove it, and the opposite to install it into the bracket. It’s quite quick to do and doesn’t require any tools. The thumb screws are similar to if not the same as the ones which secure the sliding access panels on your Mach1. 

/dale

On Jan 3, 2021, at 10:46, Patrick Spencer <patrick.spencer2@...> wrote:

Hi everyone,

I recently upgraded from a CP3 to a CP4 for my Mach1. The only thing I miss about the CP3 is the neat hanging case, which made it easy to "grab and go" and allowed me to hang the controller from a knob at the base of the mount. Unfortunately, the CP4 is too large to fit in the CP3 case. I know there's a mounting bracket option, but I like being able to quickly disconnect the control box and take it inside when I'm finished imaging.

There are a lot of clever folks in this group, so I was wondering if anyone has come up with a similar hanging pouch/bag solution for the CP4?

Thanks,

Patrick Spencer

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Hanging case for GTOCP4?

Elenillor
 

Also curious about a hanging case for the CP4. I have the mounting bracket but liked the flexibility of the hanging case for the CP3 before upgrading to the CP4. 

Speaking of suggested bags, thanks to the person who suggested the AKONA Dive Weight Bags.  I got two for my counter weights over the holidays. They work perfectly for the 6" diameter weights. I put 37 lbs in each bag.

John


Re: Hanging case for GTOCP4?

Jeff B
 

Kinda sounds like true class A power amplifier operation in my Hi-Fi hobby.  The output devices are always "on", at full current.  They run at their hottest with no signal and need a ton of heat sinks and you never enclose them.

Ignorant but curious, since absolute encoders know where they are all the time, can a model be built by manually pointing the scope, without any goto commands?

Jeff

On Sun, Jan 3, 2021 at 12:23 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
On the CP5 controllers I would advise against putting them inside a cloth bag. The CP3 and CP4 are ok because they do not produce very much current for the two servo motors under normal tracking conditions. The CP5 sends full current to both stepper servos all the time, even when they are not moving, so the drivers are at full power and produce more heat. The case dissipates the heat to the surrounding air just fine, but if they are inside a cloth bag, they will not have any air circulation.

Roland Christen
Astro-Physics Inc.


-----Original Message-----
From: Dale Ghent <daleg@...>
To: main@ap-gto.groups.io
Sent: Sun, Jan 3, 2021 10:58 am
Subject: Re: [ap-gto] Hanging case for GTOCP4?

With the mounting bracket, you only have to losen two thumb screws and tip the unit forward to remove it, and the opposite to install it into the bracket. It’s quite quick to do and doesn’t require any tools. The thumb screws are similar to if not the same as the ones which secure the sliding access panels on your Mach1. 

/dale

On Jan 3, 2021, at 10:46, Patrick Spencer <patrick.spencer2@...> wrote:

Hi everyone,

I recently upgraded from a CP3 to a CP4 for my Mach1. The only thing I miss about the CP3 is the neat hanging case, which made it easy to "grab and go" and allowed me to hang the controller from a knob at the base of the mount. Unfortunately, the CP4 is too large to fit in the CP3 case. I know there's a mounting bracket option, but I like being able to quickly disconnect the control box and take it inside when I'm finished imaging.

There are a lot of clever folks in this group, so I was wondering if anyone has come up with a similar hanging pouch/bag solution for the CP4?

Thanks,

Patrick Spencer

--
Roland Christen
Astro-Physics


Re: Hanging case for GTOCP4?

Roland Christen
 

On the CP5 controllers I would advise against putting them inside a cloth bag. The CP3 and CP4 are ok because they do not produce very much current for the two servo motors under normal tracking conditions. The CP5 sends full current to both stepper servos all the time, even when they are not moving, so the drivers are at full power and produce more heat. The case dissipates the heat to the surrounding air just fine, but if they are inside a cloth bag, they will not have any air circulation.

Roland Christen
Astro-Physics Inc.


-----Original Message-----
From: Dale Ghent <daleg@...>
To: main@ap-gto.groups.io
Sent: Sun, Jan 3, 2021 10:58 am
Subject: Re: [ap-gto] Hanging case for GTOCP4?

With the mounting bracket, you only have to losen two thumb screws and tip the unit forward to remove it, and the opposite to install it into the bracket. It’s quite quick to do and doesn’t require any tools. The thumb screws are similar to if not the same as the ones which secure the sliding access panels on your Mach1. 

/dale

On Jan 3, 2021, at 10:46, Patrick Spencer <patrick.spencer2@...> wrote:

Hi everyone,

I recently upgraded from a CP3 to a CP4 for my Mach1. The only thing I miss about the CP3 is the neat hanging case, which made it easy to "grab and go" and allowed me to hang the controller from a knob at the base of the mount. Unfortunately, the CP4 is too large to fit in the CP3 case. I know there's a mounting bracket option, but I like being able to quickly disconnect the control box and take it inside when I'm finished imaging.

There are a lot of clever folks in this group, so I was wondering if anyone has come up with a similar hanging pouch/bag solution for the CP4?

Thanks,

Patrick Spencer

--
Roland Christen
Astro-Physics


Re: Hanging case for GTOCP4?

Dale Ghent
 

With the mounting bracket, you only have to losen two thumb screws and tip the unit forward to remove it, and the opposite to install it into the bracket. It’s quite quick to do and doesn’t require any tools. The thumb screws are similar to if not the same as the ones which secure the sliding access panels on your Mach1. 

/dale

On Jan 3, 2021, at 10:46, Patrick Spencer <patrick.spencer2@...> wrote:

Hi everyone,

I recently upgraded from a CP3 to a CP4 for my Mach1. The only thing I miss about the CP3 is the neat hanging case, which made it easy to "grab and go" and allowed me to hang the controller from a knob at the base of the mount. Unfortunately, the CP4 is too large to fit in the CP3 case. I know there's a mounting bracket option, but I like being able to quickly disconnect the control box and take it inside when I'm finished imaging.

There are a lot of clever folks in this group, so I was wondering if anyone has come up with a similar hanging pouch/bag solution for the CP4?

Thanks,

Patrick Spencer


Re: Mach2 #Mach2GTO

eckhard.voelcker@...
 

On Sun, Jan 3, 2021 at 04:58 PM, Allen Ruckle wrote:
The port setting needs to be set to #23,
Thank you, Allen. I did not know that the communication was Telnet based. It works with port #23. 


Hanging case for GTOCP4?

Patrick Spencer
 

Hi everyone,

I recently upgraded from a CP3 to a CP4 for my Mach1. The only thing I miss about the CP3 is the neat hanging case, which made it easy to "grab and go" and allowed me to hang the controller from a knob at the base of the mount. Unfortunately, the CP4 is too large to fit in the CP3 case. I know there's a mounting bracket option, but I like being able to quickly disconnect the control box and take it inside when I'm finished imaging.

There are a lot of clever folks in this group, so I was wondering if anyone has come up with a similar hanging pouch/bag solution for the CP4?

Thanks,

Patrick Spencer


Re: Mach2 #Mach2GTO

Allen Ruckle
 

Eckhard,
        You did not mention what port setting you selected.

The port setting needs to be set to #23,   Also there are several people that have commented,  sky safari can be connected in the beginning of a session but if the connection does not reliably reconnect if the connection is interrupted.  

 There is a thread a while back that Astro Physics is working with the Sky Safari people to properly support the CP5, and the next update will include those changes.  It wasn’t clear if it would be in an update to V6 or when the next version, Sky Safari 7.

I’m hoping it will be soon.  In my opinion Sky Safari is the nicest desktop planetarium app available. 

aruckle


Mach2 #Mach2GTO

eckhard.voelcker@...
 

Yesterday I wanted to use the Mach2 for some observations. 

I connected the GTOCP5 to an Ethernet hub and fired up SkySafari Pro6 on my Mac. I configured the telescope as “Astro-Physics GTO”, entered the IP address of the GTOCP5 and tried to connect. Unfortunately this did not work. 

I remembered reading somewhere that in some cases SkySafari can not initialize the mount properly so I fired up APCC on a PC, set the connection to TCP/IP, entered the IP address of the mount and connected. I then used the AE tab to “Find Home”, checked that the mount was unparked and tracking was sidereal. All looked good.

I tried to connect with SkySafari Pro6 again but no success. I then tried to connect with my iPhone and Luminos but also without success. I then configured  the GTOCP5 to access my Wifi and tried again. No success. 
Then I did a port scan of the mount GTOCP5 but only the ports 23 and 80 were open. Do I miss some configuration option?
 

This used to work flawlessly with the GTOCP4. 

Best regards,
Eckhard


Re: Meridian Limit check boxes in APCC Pro are grayed out

Luca Marinelli
 

Ray, you are the man! That worked like a charm.

It's as if you wrote this program or something :)

Thank you,

Luca


Re: Meridian Limit check boxes in APCC Pro are grayed out

Ray Gralak
 

Something happened and I am not able to check or uncheck the East Limits and West Limits check boxes in
APCC Pro v1.8.8.11. It doesn't matter if the mount is connected to APCC or not, the boxes are stuck checked.

Has anyone seen this behavior and is there a way to get it back? I want to uncheck East Limits but I can't.
Perhaps "Override ASCOM" is not enabled in the Meridian Delay group box?

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
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 Luca Marinelli
Sent: Saturday, January 2, 2021 5:09 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Meridian Limit check boxes in APCC Pro are grayed out

Something happened and I am not able to check or uncheck the East Limits and West Limits check boxes in
APCC Pro v1.8.8.11. It doesn't matter if the mount is connected to APCC or not, the boxes are stuck checked.

Has anyone seen this behavior and is there a way to get it back? I want to uncheck East Limits but I can't.

Thanks,

Luca


Meridian Limit check boxes in APCC Pro are grayed out

Luca Marinelli
 

Something happened and I am not able to check or uncheck the East Limits and West Limits check boxes in APCC Pro v1.8.8.11. It doesn't matter if the mount is connected to APCC or not, the boxes are stuck checked.

Has anyone seen this behavior and is there a way to get it back? I want to uncheck East Limits but I can't.

Thanks,

Luca


Re: safe way to load the OTA on the MACH2

steve.winston@...
 

Hey Nick,

The Mach1 does break down into two smaller parts.  If you are finding the weight to be too much you might consider splitting it and mounting the RA base on the tripod first and then adding the DEC axis after.

Steve
 


Re: safe way to load the OTA on the MACH2

Nick Iversen
 

While we are on this topic is there a good way to get a Mach1 onto the tripod? Carrying the Mach1 requires leaning back in order to maintain balance. But then putting it onto the tripod requires leaning forward. That's a massive loss of balance and one day I'll be too old to do it.


Re: Lost communications with mount

weihaowang
 

Hi Ray,

Thank you for the suggestions. I will adjust
the timeout settings according to what you said.

I forgot to tell you that my ASCOM logging 
is indeed off. Last time when you mentioned
this, I looked into it and found it was off
(by default, since I didn’t change it).

Previously when TheSky6 (via ASCOM, no
APCC involvement) complained about 
lost communication, my impression was that
the tracking was also stopped. Otherwise I 
wouldn’t worry about it. (As long as the mount
keeps tracking, the imaging will not be stopped
and no exposures need to be tossed out. All I 
need to do is to reconnect TheSky when I need
to slew.) However, now you mentioned this and
I kind of forget why I had the impression that
the tracking would also stop. I will need to check
this again to be certain.

Next week when the holiday is over, I will go to
the office and send you the log. The mount and
the computer are in our office now. I had also 
sent an email to Roland. I will do the tests that
he suggests.

Cheers,
Wei-Hao



--

Homepage:

http://www.asiaa.sinica.edu.tw/~whwang/

Astrobin gallery:
http://www.astrobin.com/users/whwang/


Re: safe way to load the OTA on the MACH2

Andrea Lucchetti
 

In my case the OTA is short and the tripod wide, no problem.

With the last advice on the clutches to be on the safe side I think park2 will be ok.
Thank you!
Andrea 


Re: safe way to load the OTA on the MACH2

Jeff B
 

Of more concern to me is tipping the tripod over.


On Fri, Jan 1, 2021 at 12:05 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:

Do you think the DEc friction will manage that unbalance for the time required to lock the rings?
No problem holding large unbalance. You can tighten the clutch knobs very hard with an Allen wrench.

Roland


-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Fri, Jan 1, 2021 6:03 am
Subject: Re: [ap-gto] safe way to load the OTA on the MACH2

Thank you,
in my case three things worries me:
-my latitude is 42 deg, but that it shouldn't be a problem
-my rings are not very quick to lock: I have to put on the half ring and tighten the screws
-the scope will be unbalanced in DEC without the imaging train  and guide scope

Do you think the DEc friction will manage that unbalance for the time required to lock the rings?
or is this going to stress the mount too much?
I think I can find a balance point for this unloaded configuration, load the OTA in this configuration and slide the OTA back during final balance (it is a newton).

Thank you,
Andrea

--
Roland Christen
Astro-Physics


Re: safe way to load the OTA on the MACH2

Roland Christen
 


Do you think the DEc friction will manage that unbalance for the time required to lock the rings?
No problem holding large unbalance. You can tighten the clutch knobs very hard with an Allen wrench.

Roland


-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Fri, Jan 1, 2021 6:03 am
Subject: Re: [ap-gto] safe way to load the OTA on the MACH2

Thank you,
in my case three things worries me:
-my latitude is 42 deg, but that it shouldn't be a problem
-my rings are not very quick to lock: I have to put on the half ring and tighten the screws
-the scope will be unbalanced in DEC without the imaging train  and guide scope

Do you think the DEc friction will manage that unbalance for the time required to lock the rings?
or is this going to stress the mount too much?
I think I can find a balance point for this unloaded configuration, load the OTA in this configuration and slide the OTA back during final balance (it is a newton).

Thank you,
Andrea

--
Roland Christen
Astro-Physics


Re: Lost communications with mount

Roland Christen
 

Hello,

Can you contact me directly at my e-mail (chris1011@...) and we can review this with our engineering staff. There may be some tests we can do that will reveal what may be the cause.

Roland Christen
Astro-Physics Inc.



-----Original Message-----
From: weihaowang <whwang@...>
To: main@ap-gto.groups.io
Sent: Fri, Jan 1, 2021 2:05 am
Subject: Re: [ap-gto] Lost communications with mount

One update: I switched to wifi, and the problem still occurs.

This time, TheSky6 is connected to Mach2 through ASCOM, and no APCC involvement.
After the click sound, the ASCOM driver thinks Mach2 is parked, while TheSky is not aware
of anything.

This wifi experiment only lasts 10 minutes.  I have to shut everything down and go home now.
Based on this brief experiment, the problem is perhaps not related to the USB connection.


--
Homepage:

--
Roland Christen
Astro-Physics


Re: Lost communications with mount

Ray Gralak
 

When you hear the click mostly the power is shut down or the voltage is too low.
I agree. This would explain the behavior described in the different test scenarios.

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
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 Konstantin von Poschinger
Sent: Friday, January 1, 2021 3:47 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Lost communications with mount

When you hear the click mostly the power is shut down or the voltage is too low.


Grüsse

Konstantin v. Poschinger


Hammerichstr. 5
22605 Hamburg
040/8805747
0171/1983476


Am 01.01.2021 um 09:05 schrieb weihaowang <whwang@gmail.com>:



One update: I switched to wifi, and the problem still occurs.

This time, TheSky6 is connected to Mach2 through ASCOM, and no APCC involvement.
After the click sound, the ASCOM driver thinks Mach2 is parked, while TheSky is not aware
of anything.

This wifi experiment only lasts 10 minutes. I have to shut everything down and go home now.
Based on this brief experiment, the problem is perhaps not related to the USB connection.


--


Homepage:

http://www.asiaa.sinica.edu.tw/~whwang/

Astrobin gallery:
http://www.astrobin.com/users/whwang/

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