Date   

locked Re: Connecting EXOS 2 PMC 8 to ASIair Pro #EXOS2 #TECHNICAL

Dino Monaco
 

Steve

It was confusing at first for me as well. But the tech help at Explore Scientific pointed me in the right direction.
True you will need a DB9-USB w the FTDI chip set. I found them on Amazon. Theyre  Cheap.
Then we need to download the programs from their website.
If you go to the group.io and do a search for Asiar & PMC8 someone wrote a beautiful procedure.
I’m still waiting for my exes 2 because it’s backordered.
But for now contact tech support at Explorescientific.
Try emailing Tyler@explorescientific. He will help you.
 Dino

On Jan 4, 2021, at 12:13 PM, Dino Monaco <dinomonaco@...> wrote:

Hey Tyler.

Pleas send me a procedure for linking the PMC8 & asiair .
This would make my life a whole lot easier.

Thanks.com

Dino


On Jan 4, 2021, at 11:13 AM, Tyler Bowman - Explore Scientific Customer Service <Tbowman@...> wrote:

It's super simple and i can walk you through it no biggie. send me a email at Tyler@...

--
Dino Monaco


locked Re: Connecting EXOS 2 PMC 8 to ASIair Pro #EXOS2 #TECHNICAL

Dino Monaco
 

Hey Tyler.

Pleas send me a procedure for linking the PMC8 & asiair .
This would make my life a whole lot easier.

Thanks

Dino


On Jan 4, 2021, at 11:13 AM, Tyler Bowman - Explore Scientific Customer Service <Tbowman@...> wrote:

It's super simple and i can walk you through it no biggie. send me a email at Tyler@...

--
Dino Monaco


locked Re: Connecting EXOS 2 PMC 8 to ASIair Pro #EXOS2 #TECHNICAL

Tyler Bowman - Explore Scientific Customer Service <Tbowman@...>
 

It's super simple and i can walk you through it no biggie. send me a email at Tyler@...


locked Connecting EXOS 2 PMC 8 to ASIair Pro #EXOS2 #TECHNICAL

 

Hi,
 
I emailed Bresser with this question earlier but they didn't know the answer & directed to ask here. 
Although I should have checked before I bought it      (I can still get a refund as I only have it on pre order) I was looking at ways to control my whole Astrophotography set up with my ES EXOS II PMC 8 mount and the ASIair Pro control box seemed perfect. 
But when I looked into how they both connect to each other & after countless searches on line all I could find was that I'd need a cable with an FTDI Chipset but that the chipset would need to be reprogrammed.
 
Unfortunately I'm not particularly technically minded & havnt a clue what an FTDI chipset is never mind how to reprogramme one.
I'd be very grateful if someone has any info on this or can at least point me in the right direction.
Better still would be an idiots guide to connecting them both 😬
 
Regards
 
Steve
 
 


Re: iEXOS 100 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

Wes Mcdonald
 

John

The list might be blank until you press the refresh button.  Try that.

If you did already try that then you have to open the device manager on windows and see if the usb to serial adapter is listed.  If it is not, and you are sure you have the driver installed, then I suggest you try another usb cable.  Be sure the cable is not a charging only cable.  Some do not have data capability.  This has burned others on the forum.

If the cable is good, and the driver is good, and the iexos is powered and you are sure windows is working, then maybe the iexos has failed.  But that is not likely.  

How about when you give it all a go, if you have  no luck you give us a step by step what you did relative to the configuration manager 

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 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

 

Hi Wes,

Answers:
John
How do I regain communication with my mount, iEXOS 100. (Explore Stars Application / UDP)
Kabul :-)

Thank you for the advice,
I did what you suggested, installed the FTDI driver, plugged in everything and booted up the mount.
Opened CM, verified that I was connected to the PMC-8 network, button is green.
No options listed in the drop down port list, blank.
Tried to manually enter the COM settings with no success, also tried different USB ports on my computer.
I repeated the steps 4 times now and still no joy.

Thank you for the advice!


Re: iEXOS 100 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

Wes Mcdonald
 

Jlospinuso:

What is your name
What is your quest 
What is the capitol of Afghanistan 

Get your serial cable, make sure it is not power only

Load the parallax ftdi driver from the parallax web pag

Plug everything in.  Boot iexos.  Connect WiFi to pmc8 network 

Open configuration manager. 

Check the cm shows green lower right on connection tabfor the WiFi 

Press the refresh button
Drop down comm port list and select the pmc8 comm port

Press find button

If you get a positive response press top right do it button

Then set the comms mode to udp

Good luck

Hopefully you will avoid the valley if eternal peril





--
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 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

 

Thank you Roger for the response.
I've tried setting it back to wireless with the USB cable plugged in, the response is "Wi-Fi connection not found"
My computer is connected to the PMC wireless network, in order to open the Config Manager, yet the Config Manager cannot see it.
Here is the response when I save the settings, "PMC-Eight connected to PMC-Eight-0184"
Still it says  "Wi-Fi connection not found"

I am at a loss...
Any advice would be great as I am stuck for now :-)
Thank you all so much.




Re: iEXOS 100 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

Roger Laine
 

I had a similar experience in testing my setup: whilst exploring the use of the PMC-Eight Config Mgr I switched to ‘Serial’ with no serial cable connected and that was the end of my testing: I could only restore communication with the mount once I connected using the cable that was at that time still in the post! (I used to be a Software Consultant so I am a compulsive ‘tester’!)
Maybe there is a means of switching it back to UDP without a cable?  I don’t know. Good luck with it.
Regards
Roger, Atherstone, England, UK
Mount: ES iEXOS-100, Celestron NexStar SLT
OTA: Celestron 127/1500 Mak , Svbony 60mm Guide scope
Camera: Svbony Sv305, Sv205


iEXOS 100 - lost communication #iEXOS-100 #ConfigManager #ExploreStars

 

All,
I am very new to this hobby.
I recently purchased an ES iEXOS 100 mount, had everything working perfectly. Explore Stars communicated and was able slew, search, etc...
Now I have no communication with the mount, I am connected to the PMC-Eight wireless network but nothing works.
What I tried was;
- Config Manager - reset to UDP, to TCP and back to UDP, tried the serial connections still nothing. Cannot connect to wifi
-  ASCOM drivers and applications, switched the network to TCP and ASCOM could not see the mount, reset back to UDP, even though no network is found.
I am at a complete loss here, is there a way to reset the mount back to factory default? 
Thank you!


Re: Connecting PMC-Eight to ZWO ASIAIR Pro

Omar Rahman
 

It’s not exactly plug and play but it’s not far from it either.
--

Scope:        
ES ED102
Mounts
:      ES EXOS2-PMC-8, SkyWatcher Star Adventurer
Cameras:   ASI1600MM Pro, Nikon D7500
Lens:
          Nikon 200-500mm, Tamron 70-200mm G2, Nikon 120mm manual lens
Misc:          ZWO ASI120Mini Guide Camera, ZWO 30mm mini guidescope, Stellarmate, Asiair
Software:  Kstars, SkySafari, ExploreStars (android), Pixinsight, DeepSkyStacker, Regim, Astrostakkert, LR/PS, RNC-color-stretch
Computer:  Macbook Pro, Surface Pro 4, iPhone, Fire 7


Re: Connecting PMC-Eight to ZWO ASIAIR Pro

Steve Siedentop
 

There’s some good documentation on setting up the PMC-Eight with the ASI Air in the files section.

-Steve

On Wed, Dec 30, 2020 at 6:48 PM Dino Monaco via groups.io <Dinomonaco=me.com@groups.io> wrote:
Hi,

So I’ve ordered the EXOS2 w the PMC Eight system. Backordered at the moment.
In the meantime, I was thinking of interfacing the ASIAIR Pro device to exploit full functionality of both systems; i.e. automated wireless mount driver of the PMC 8, & the camera + plate solving capabilities of the ASIAIR devices.
Question: how do I set this up?
I’ve noticed that the ASIAIR Application has a selection for explore scientific EXos2 in its telescope control setup menu.
I’m assuming I need to attach a DB9-USB cable from the device to the PMC8.
But I’m also assuming it won’t be just a plug & play situation.

Thanks for your help in advance 🙏

Dino Monaco





--
Dino Monaco






--
Mounts: ES PMC-8 G11 with Ruland Couplers and One Piece Worm Blocks, Skywatcher NEQ-6
Scopes: ES ED127CF FCD100, Orion 6” Mak, Stellarvue SV80EDT, Coronado Solarmax 40
Cameras:  CentralDS CDS-600, CentralDS Astro 60D, Orion Starshoot SSAG
Msc: Moonlite Focusers, Astrozap Dew Straps, Pegasus Ultimate PowerBox
Software: PixInsight, Cartes du Ciel, BackyardEOS, SkySafari


Connecting PMC-Eight to ZWO ASIAIR Pro

Dino Monaco
 

Hi,

So I’ve ordered the EXOS2 w the PMC Eight system. Backordered at the moment.
In the meantime, I was thinking of interfacing the ASIAIR Pro device to exploit full functionality of both systems; i.e. automated wireless mount driver of the PMC 8, & the camera + plate solving capabilities of the ASIAIR devices.
Question: how do I set this up?
I’ve noticed that the ASIAIR Application has a selection for explore scientific EXos2 in its telescope control setup menu.
I’m assuming I need to attach a DB9-USB cable from the device to the PMC8.
But I’m also assuming it won’t be just a plug & play situation.

Thanks for your help in advance 🙏

Dino Monaco





--
Dino Monaco


Re: iexos-100 beginner comments (Mac user) #iEXOS-100 #iPadOS #FIRMWARE

Paul Mogg
 

Great news, I'll try it tonight then,

Thank you Mirko!

Paul

--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Nikon D5200 DSLR
Orion 50mm guide scope
Oriion Starshoot guide camera
ZWO EAF 
Telrad.
28mm 2" and 12mm 1.25" lenses.
2 and 5 x Barlows.
Macbook Air 
Huawei Android T5 Tablet
Software: Kstars / EKOS, ExploreStars Android & WIndows, Stellarium, AstroDSLR.


Re: iexos-100 beginner comments (Mac user) #iEXOS-100 #iPadOS #FIRMWARE

Mirko Gude
 

Hi Paul,

your second question: I have an iEXOS 100 and an Exos2-PMC8. The iEXOS needs one more step (switching from UDP to TCP). For me it works with CoolTerm for both mounts… I tried it with my Mac and from a Raspberry Pi.

Best regards, 
Mirko

Am 29.12.2020 um 19:03 schrieb Paul Mogg <pdmogg@...>:

Hi Everyone,

First just a big thank you to all he experts here for helping beginners such as myself get started. It would be so much harder without you!

 

Ok, so since I last posted on this thread I have got more into Kstars / EKOS on the Mac and think it’s bees knees, everything you could want rolled into one package it seems, and the Plate Solving is so cool!. I’m now getting started with Guiding, bought a guide camera and scope and a better DSLR that can do more than 30sec shots. So a couple of questions on guiding:

 

1. I’ve been able to get rough guiding going using PHD2 and the ST-4 cable, but the guiding graph seems all over the place, and I’ve since read that Pulse guiding over serial cable is the better way to go. 

 

So, can you do Pulse guiding via the WIFI connection to the PMC-Eight box? Or does it have to be via the special Serial cable ( USB—>DB9 )?  

 
 

2. In this thread Mirko kindly posted instructions for switching the IEXOS 100 to Serial mode via OSX Terminal instructions, and then using CoolTerm to switch back when needed, if I understand correctly.

 

So do these instructions also apply to the EXOS-2 PMC-Eight mount? 

 

I bought a USB—>DB9 FTDI cable and managed to successfully Flash it using FT_Prog (under Parallels / WIndows 10) as per the instructions on this forum, but don’t want to risk trying it out till I know for sure.

 

I have an Exos-2 PMC-Eight mount, NOT an IEXOS-100.

 
 

Thank you!

Paul

--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Nikon D5200 DSLR
Orion 50mm guide scope
Oriion Starshoot guide camera
ZWO EAF 
Telrad.
28mm 2" and 12mm 1.25" lenses.
2 and 5 x Barlows.
Macbook Air 
Huawei Android T5 Tablet
Software: Kstars / EKOS, ExploreStars Android & WIndows, Stellarium, AstroDSLR.


--

Mounts: ES PMC-8 IEXOS 100, ES EXOS2-GT 
Scopes: Skywatcher 80/600, TS Photoline 72/432mm-Apo
Cameras:  Nikon Z6, D7000, ZWO ASI385 Color, QHY 5L-II-mono
Lens: Sigma 150-600mm, Sigma Art 135mm/1,8, Nikon Z 50mm/1,8, Tamron 70-200mm
Msc: LRTimelapse Pro Timer 2.5, Raspberry Pi4, Polemaster, GPS Dongle, QHY miniGuideScope
Software: PixInsight, Kstars, Starry Night, Redshift


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Joe Izen
 

Rix,
Adding my voice to the chorus about the criticality of balance.  An 80 mm refractor + iExos100 is my littlest. I thought that because it is so little, the motor would overpower minute weight imbalances.  Not so.  A 2” diagonal+2” wide field eyepiece is a substantial fraction of the weight of the scope. Ditto a reducer/corrector+a DSLR.  I find I have to focus and then balance, because the act of focusing can disturb   the balance badly enough to upset the drive motors.  Of my 4 telescopes (6” newt, 127mm refractor, C14) the 80mm refractor on the iExos100 is the monest finciky about balance. I wouldn’t have thunk it.
Joe

On Dec 29, 2020, at 4:45 PM, Robert Hoskin via groups.io <devonshire@...> wrote:

This was specifically about what you should expect when turning the gears by hand, during adjustment - and that illustrating one of the reasons why balance is important during a session (whether using Explorestars or anything else to control the mount).  The worm doesn't know or care what the control program is... 



Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Wes Mcdonald
 

Rix:

IF your are tracking the explorestars display might flip back a forth 1 arc second.  What you have to watch out for is the RA changing every second in a consistent  way increasing or decreasing.  Realize that when you are tracking the mount is constantly moving, but the RA is not changing if the ount is tracking.  The az and el are constantly changing while tracing in an equatorial mount.

So if you are saying the RA is flipping back and forth by one second while tracking then things are working fine.  Remember it is displaying stuff with finite precision so if you are right on the edge of the round off you are gonna see flipping around..
wes.


Virus-free. www.avg.com

--
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 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

 

Rix,

This was specifically about what you should expect when turning the gears by hand, during adjustment - and that illustrating one of the reasons why balance is important during a session (whether using Explorestars or anything else to control the mount).  The worm doesn't know or care what the control program is... 

On Tue, Dec 29, 2020, at 17:36, Rix Yarbrough wrote:
This is also good to know.. however it is clear that RA motion is not actually occurring as the explorestars app reads the RA as changing back and forth rapidly by 1 arcsecond or so, never actually progressing at a constant rate as it should, although I can check again.

On Tue, Dec 29, 2020 at 17:17 Robert Hoskin <devonshire@...> wrote:

Rix,

Assuming that you have a decent gear mesh, do not be surprised if the gears are quiet and smooth when LIFTING weight as you turn by hand, yet chatter when LOWERING it. 

When lowering, the worm is acting as a brake, and you can get a stick-slip action (chatter).  If that's when you're hearing odd noises, it's normal and nothing to worry about.  Just the nature of the beast.  Balance East-heavy during your session and you're good.

HTH...


On Tue, Dec 29, 2020, at 17:03, Rix Yarbrough wrote:
Very good to know, Rob. I will look into it. Wondering if anyone else has had the same issue, or if there are good resources as to what the gears should feel/sound like when turned by hand to test. How much resistance should I feel, etc.. just so I know this is actually the problem. Also wondering if and how previous lubricants should be stripped away first.

Rix 

On Tue, Dec 29, 2020 at 16:57 Robert Hoskin <devonshire@...> wrote:

Rix,

Can't speak to your iExos-100 problem specifically (cos' I don't have one), but as to WD-40 as a gear lube...

No..no..no....  It's good for lots of things (just like duct tape), but a grease substitute it's not.  Heck, I use it to clean the grease OFF my gears when I'm servicing my mount.

Here's the thing.  Worm gears tend to wipe the grease off their teeth as they work.  You want something sticky enough to resist that over time.  I think my mount came with a lithium grease on its worm.  I replaced that with LiquiMoly + MnS02 (basically, ball joint grease).  Messy, but tenacious.  Some here like Superlube + Teflon.  Other candidates as well.  Lots of vigorous debate on what's best for a grease, but I think we'd all agree that WD-40 is not a good choice for that application.

HTH...



On Tue, Dec 29, 2020, at 16:28, yarbroughrix@... wrote:

Got a used iEXOS-100 and was finally able to diagnose my issue: it seems that the RA motor, in particular, is struggling to move the mount. When connected to the app and tracking, the motors can be heard "chugging" as if they are struggling. The explorestars app shows that when tracking, the RA axis just flips back and forth one arc second at a time rapidly (38, 39, 38, 39, etc), leading me to believe the motor is not putting out enough torque to turn the axis. When I attempt to slew at a high speed, and motor sounds like it is struggling, making a bad racket, but is able to rotate the axis. Seems like it's just facing more friction than it is expecting, perhaps? I've tried adjusting the backlash at three levels (tight, loose, medium) but it seems not to have an effect. Maybe I need to relubricate the RA gear teeth? Is WD-40 recommended, or something else? I'd like to not experiment much more until I know a fix, as I am worried about damaging the motor. Any advice is welcome.

 

Rix



--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64






--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64





--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Rix Yarbrough <yarbroughrix@...>
 

This is also good to know.. however it is clear that RA motion is not actually occurring as the explorestars app reads the RA as changing back and forth rapidly by 1 arcsecond or so, never actually progressing at a constant rate as it should, although I can check again.

On Tue, Dec 29, 2020 at 17:17 Robert Hoskin <devonshire@...> wrote:
Rix,

Assuming that you have a decent gear mesh, do not be surprised if the gears are quiet and smooth when LIFTING weight as you turn by hand, yet chatter when LOWERING it. 

When lowering, the worm is acting as a brake, and you can get a stick-slip action (chatter).  If that's when you're hearing odd noises, it's normal and nothing to worry about.  Just the nature of the beast.  Balance East-heavy during your session and you're good.

HTH...


On Tue, Dec 29, 2020, at 17:03, Rix Yarbrough wrote:
Very good to know, Rob. I will look into it. Wondering if anyone else has had the same issue, or if there are good resources as to what the gears should feel/sound like when turned by hand to test. How much resistance should I feel, etc.. just so I know this is actually the problem. Also wondering if and how previous lubricants should be stripped away first.

Rix 

On Tue, Dec 29, 2020 at 16:57 Robert Hoskin <devonshire@...> wrote:

Rix,

Can't speak to your iExos-100 problem specifically (cos' I don't have one), but as to WD-40 as a gear lube...

No..no..no....  It's good for lots of things (just like duct tape), but a grease substitute it's not.  Heck, I use it to clean the grease OFF my gears when I'm servicing my mount.

Here's the thing.  Worm gears tend to wipe the grease off their teeth as they work.  You want something sticky enough to resist that over time.  I think my mount came with a lithium grease on its worm.  I replaced that with LiquiMoly + MnS02 (basically, ball joint grease).  Messy, but tenacious.  Some here like Superlube + Teflon.  Other candidates as well.  Lots of vigorous debate on what's best for a grease, but I think we'd all agree that WD-40 is not a good choice for that application.

HTH...



On Tue, Dec 29, 2020, at 16:28, yarbroughrix@... wrote:

Got a used iEXOS-100 and was finally able to diagnose my issue: it seems that the RA motor, in particular, is struggling to move the mount. When connected to the app and tracking, the motors can be heard "chugging" as if they are struggling. The explorestars app shows that when tracking, the RA axis just flips back and forth one arc second at a time rapidly (38, 39, 38, 39, etc), leading me to believe the motor is not putting out enough torque to turn the axis. When I attempt to slew at a high speed, and motor sounds like it is struggling, making a bad racket, but is able to rotate the axis. Seems like it's just facing more friction than it is expecting, perhaps? I've tried adjusting the backlash at three levels (tight, loose, medium) but it seems not to have an effect. Maybe I need to relubricate the RA gear teeth? Is WD-40 recommended, or something else? I'd like to not experiment much more until I know a fix, as I am worried about damaging the motor. Any advice is welcome.

 

Rix



--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64





--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Matt Hallett
 
Edited

Rix,

Had/have exactly the same issue. Went through a very similar series of troubleshooting, including a similar post on this forum. Came up with two key bits of useful information.

1. You absolutely must balance your mount perfectly. Chances are this will solve most/all your issues. If you have an unbalanced mount then the gear will either be working too hard to hold the unbalanced weight back, or needing extra torque to drag that weight up. If you're balanced then there will still be load put on the gears at points...I've noticed a change in the tone during slewing when the load increases as the weight (and thus centre of gravity) moves around...but it shouldn't be so much that everything crunches up together. Here's an example of the problem I was having - https://www.youtube.com/watch?v=kPROlB3gjSc - but I realised during troubleshooting that I had a counterweight on the mount but nothing at the other end to balance it out. So the moment the counterweight bar went beyond about the 5 o clock mark the worm gears didn't have enough torque to pull the weight up and the teeth meshed together.

2. If you're still having chugging/grinding/crunching noises when slewing and then the wheel flips back and forth when tracking then you probably need to adjust the worm gear. This video will tell you all you need to know - https://www.youtube.com/watch?v=mLXE_BMKVAw&t (worth watching the whole thing but it's the bit from 3:48 - 5:26 that you mainly want to watch). If you do this then be careful. First time I did it I made the worm gear too tight and the whole thing seized up. Then I adjusted it and made everything too loose, so there was a loads of movement in the gears. It really is about moving the gears and wheels by fractions of mm.

I pretty much have my mount working smoothly now. Still the occasional issue when slewing from one point in the sky to a completely different point but that can normally be resolved with a spot of manual tracking and re-syncing.

Good luck!

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

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

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