Date   

Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Joe Izen
 

Wes,
Is there a video that shows how to adjust to reduce/eliminate backlash on the declination axis? The RA video mentions it can be done, but doesn’t show how.
Thanks
Joe

On Dec 11, 2020, at 6:30 AM, Wes Mcdonald via groups.io <wesmcd6@...> wrote:

Your mount bound where the thing stalled.   The mesh of the worm and wheel gear is too tight.  You need to adjust it.   

This video shows how 



Re: New ASCOM 6.5

Doug Doonan
 

Hi all,
I think I found my problem. I had the mount running using the ASCOM 6.5 stuff. There are a couple of things that were funny about it, but I  will see if they are due to  my excitment  and/or dumb stuff.
Doug



-----Original Message-----
From: Doug Doonan via groups.io <dougdwd@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Thu, Dec 10, 2020 8:47 pm
Subject: [ESPMC-Eight] New ASCOM 6.5

Hi all,
I am having a tough time using the new ASCOM 6.5 to control my PMC8 exos2 mount. It runs AOK using the old POTH routine, but I would like to get it running on the new ASCOM before the POTH goes down.
Is there any one here that can help me?
Doug
--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.

--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Wes Mcdonald
 

You probably need to do the one at 3:49.  And you have to manually rotate the wheel 360 degrees to see where it binds and make the mesh just tight enough.   You will have to find the happy medium where the mesh is as tight as it can be without binding at the two (usually) high points (or one) and is not too lose at the low points.   It’s a balancing act.

The second adjustment is also sometimes necessary if there is end play in the worm.   This allows the work to move back and forth along its axis instead of forcing the wheel to turn.  You can observe this when you turn the wheel pulley by hand to where it is moving the wheel in on direction and then reverse the direction while observing the worm movement. It should not translate along its axis.   If it does then do the dime adjustment.    

Wes

--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Matt Hallett
 

Hi Wes,

Just to be clear, is the bit I would adjust relating to the video at 5:56 (where he loosens/tightens the worm gear shaft with a dime, or the adjustment he goes through at 3:49 with the 3mm and 2mm hex keys?

I don't want to go twisting the wrong bolts!

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

Mount: iexos-100 with PMC-8
Scopes: Startravel 102
Camera:  Nikon D7500
Software: Deep Sky Stacker, Siril, Photoshop


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Wes Mcdonald
 

Matt

Your mount bound where the thing stalled.   The mesh of the worm and wheel gear is too tight.  You need to adjust it.   

This video shows how 


--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Ian Morison
 

Hi Matt,
    I am using a 22 ampere hour golf buggy battery and have had no problems with my mount.
Cheers,

Ian

Virus-free. www.avast.com


On Fri, Dec 11, 2020 at 9:56 AM Matt Hallett <hello.matthallett@...> wrote:
Interesting.

It's running off batteries at the moment. Maybe Santa will bring me a mains supply!

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

Mount: iexos-100 with PMC-8
Scopes: Startravel 102
Camera:  Nikon D7500
Software: Deep Sky Stacker, Siril, Photoshop


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Matt Hallett
 

Interesting.

It's running off batteries at the moment. Maybe Santa will bring me a mains supply!

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

Mount: iexos-100 with PMC-8
Scopes: Startravel 102
Camera:  Nikon D7500
Software: Deep Sky Stacker, Siril, Photoshop


Re: iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Yorksman
 

Are you powering it with mains or batteries? I found some batteries did not supply enough power and those that did ran low quickly and again gave the same problems. All this was fixed when I ran it from a mains supply.


iEXOS-100 worm gear jamming/crunching? #FIRMWARE #iEXOS-100 #goto

Matt Hallett
 

Ran a slewing test on my iEXOS-100 last night (relating to my alignment issues in another thread).

Gears started to make an unpleasant crunching noise, so took off the plastic housing to see what was going on.

Video is here - https://youtu.be/kPROlB3gjSc

Should I be worried?

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

Mount: iexos-100 with PMC-8
Scopes: Startravel 102
Camera:  Nikon D7500
Software: Deep Sky Stacker, Siril, Photoshop


New ASCOM 6.5

Doug Doonan
 

Hi all,
I am having a tough time using the new ASCOM 6.5 to control my PMC8 exos2 mount. It runs AOK using the old POTH routine, but I would like to get it running on the new ASCOM before the POTH goes down.
Is there any one here that can help me?
Doug
--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.


Re: iexos-100 wobble and bad star alignment

Doug Walker
 

Watch the whole video and read the comments before starting.

On 12/10/2020 1:39 PM, Don Ivie via groups.io wrote:
Ok! I will give it a shot!
--
Explore Scientific iEXOS-100
Canon T1i (no mod)
Canon 18-55mm zoom lens
Canon 75-300mm zoom lens
Astromania 60mm guidescope
ZWO ASI 120MC-S
Lenovo m93 / Win10Pro
NINA, DSS, SiriL, GIMP, Phd2


Re: iexos-100 wobble and bad star alignment

Don Ivie
 

Ok! I will give it a shot!


Re: iexos-100 wobble and bad star alignment

Wes Mcdonald
 

Yes this is theirs 

Wes

On Thu, Dec 10, 2020 at 1:18 PM Doug Walker <espmc8@...> wrote:
I believe this is their lead QA guy in his workshop

On 12/10/2020 12:41 PM, Don Ivie via groups.io wrote:
> Is this video legit? I mean like is there something official from ES in
> either video or written form?
>


--
Explore Scientific iEXOS-100
Canon T1i (no mod)
Canon 18-55mm zoom lens
Canon 75-300mm zoom lens
Astromania 60mm guidescope
ZWO ASI 120MC-S
Lenovo m93 / Win10Pro
NINA, DSS, SiriL, GIMP, Phd2






--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: iexos-100 wobble and bad star alignment

Doug Walker
 

I believe this is their lead QA guy in his workshop

On 12/10/2020 12:41 PM, Don Ivie via groups.io wrote:
Is this video legit? I mean like is there something official from ES in either video or written form?
--
Explore Scientific iEXOS-100
Canon T1i (no mod)
Canon 18-55mm zoom lens
Canon 75-300mm zoom lens
Astromania 60mm guidescope
ZWO ASI 120MC-S
Lenovo m93 / Win10Pro
NINA, DSS, SiriL, GIMP, Phd2


Re: iexos-100 wobble and bad star alignment

Don Ivie
 

Is this video legit? I mean like is there something official from ES in either video or written form?
 


Re: iexos-100 wobble and bad star alignment

Doug Walker
 

On 12/10/2020 12:03 PM, Don Ivie via groups.io wrote:
Where is the video about backlash? I too have this issue.
--
Explore Scientific iEXOS-100
Canon T1i (no mod)
Canon 18-55mm zoom lens
Canon 75-300mm zoom lens
Astromania 60mm guidescope
ZWO ASI 120MC-S
Lenovo m93 / Win10Pro
NINA, DSS, SiriL, GIMP, Phd2


Re: iexos-100 wobble and bad star alignment

Don Ivie
 

Where is the video about backlash? I too have this issue.


Re: iexos-100 wobble and bad star alignment

Wes Mcdonald
 

Matt:

1.  The iexos100 does have backlash adjustments.  There is a video somewhere, probably can find a link on the ES web site or perhaps someone can provide it.

2.  A few key points about how the mount works.

a.  The motors only know where they are because every movement made by the mount is kept track of in the firmware.  This means if you ever move the telescope with the clutches released, the mount firmware no longer knows where the mount is.
b.  Get your mount physically polar aligned.  This is a process that does not involve the telescope or motors if you are using the polar scope or tunnel.  Now you must return your telescope, by loosening the clutches and manually placing the scope, into the polar home position.  This position is one that has your scope approximately pointing at Polaris, preferably with a 45' offset from the center of the eyepiece.  Now is the time to power the mount.  At powerup the PMC8 assumes the telescope is pointing at polar home.
c.  The 2-3 star alignment can proceed and should be closer on the stars than you experienced.  However there is no sequential improvement to the alignment star positions...each star will have about the same error until the process is complete and Explorestars does the calculation for the virtual alignment.  At that point subsequent goto performance will be better
d.  Goto performance can be wrecked by mislevel in the east-west direction, I call this tilt.  Tip (north-south) is removed by the polar alignment.  In principle mislevel is accounted for in the 2-3 star alignment, buy in general I suggest you try to get the mount level before doing the alignment.
e.  If you have DEC home error, that is you have the scope twisted a bit off if the RA axis when you begin the 2-3 star alignment, this error is not removed by the 2-3 star alignment.  
f.  If the telescope is mounted on the saddle with a bit of tip, called cone error, this will affect your gotos.  This tip is not removed by the 2-3 star alignment.
g.  If you are using Explorestars with a 2-3 star alignment, you must understand the mount is being driven while in P (point) mode to maintain pointing despite polar alignment error.  For visual this is great.  But for photography it might not be great, as P mode does corrections 5 times per second.  For photography one needs to place the unit into T (track) mode.  In T mode the RA motor runs at sidereal rate exactly, while the DEC axis does not move.  If there is polar alignment error the object will drift on the field of view.  
h.  One way around some of this is to use short focal length telescopes.  
i.  Also be sure to use the SYNC button once you center your scope on a desired object.  Explorestars takes this to be the correct position and uses this knowledge to point the scope subsequently.  The result is that most. if not all, of the PA error etxc is removed FOR A POSITION NEAR WHERE THE SYNC WAS DONE.   So gotos to nearby objects should be good.

These points will help I think.

Wes.


On Thu, Dec 10, 2020 at 10:04 AM Yorksman <harry@...> wrote:
Yes, I have successfully manually slewed after having a 'good enough' polar alignment. I had exactly the same problem as you did so I selected Pleiades in ExploreStars, the slew was way off but then respositioned by hand and then pressed the 'T' buttons. This was a 30 sec exposure, seems to track well enough. First ever shot at the stars. I expect if I wanted longer exposures, I had better get a better polar alignment. I think the polar alignment just aligns the mount and lets the electronics know where it is. The telescope is quite separate until you move it and sync it with something. "Way off" is something one hears often for the first slew or two, but tracking works well enough. Have a go.


--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: iexos-100 wobble and bad star alignment

brian skinner
 

Hi, at present I reasonably polar align using the IEXOS100 Polar Scope but accept it only gives a "rough alignment" however I do manage at least 2 minute exposures without trailing. However I do also 3 star align rather than 2 which does improve slewing accuracy.
Obviously also the longer your focal length the narrower the FOV which does often mean your target is or can be outside of your live camera view. To help on this I do recommend a red dot finder scope.
Kind regards, Brian 
--
Brian Skinner
iEXOS100
Canon 1300d dslr
Various lenses
ES Polar scope
Sequator image stacker
PIXR image editor


Re: iExos 100 Reset to Factory Defaults #iEXOS-100

Bob Rucker <javaruck@...>
 

Wes,

I reached that conclusion as well. Luckily support has been awesome and the new part will arrive tomorrow. 

Bob

On Thu, Dec 10, 2020 at 9:05 AM Wes Mcdonald <wesmcd6@...> wrote:
Bob:

For the moment the unit must be connected to serial to get it to go back from serial to wifi.  Just the way it is.  Maybe different one day.

Wes.


--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired

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