Date   

Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Tyler Bowman - Explore Scientific Customer Service
 

Im curious on why your using the Device HUB instead of POTH.

 

1458310636860_logo.png

 

Tyler Bowman - Customer Service

Office   +1(866) 252-3811 Ext: 516

Fax        +1(479) 717-2898

 

EXPLORE SCIENTIFIC, LLC

1010 South 48th Street

Springdale, AR 72762 USA

 

Brands: Explore Scientific | Bresser | Explore One 
Official Licensee: National Geographic | Discovery

 

Publications:  Sky's Up Magazine

 

Affiliations: UNESCO Space Education Program | AstronomyOutreach network

 

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of jeverson.biz via groups.io
Sent: Thursday, October 15, 2020 4:46 PM
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

 

Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


--

1458310636860_logo.png

 

Tyler Bowman - Customer Service

Office   +1(866) 252-3811 Ext: 516

Fax        +1(479) 717-2898


Re: Dec axis motor system faulty or newbie error?? #EXOS2

Tony
 

Try opening the belt inspection door on the DEC side and see if the motor is moving, and if so, if the belt and big pulley are moving as well.  Perhaps the bolt that holds the DEC motor loosened up and the belt is slack, allowing the motor to spin without grabbing the belt.  Do you hear any clicking or other noises?  You said it sounds normal when slewing, so I assume you do hear the motor moving.

Good luck,
-Tony

On 10/16/2020 8:05 AM, Paul Mogg wrote:
Last night, the DEC axis motor system on my new Exos 2 PMC-8 mount seemed to develop a problem and  stopped moving that axis at all. I tested it again this morning and it's the same. The clutches were all tight as I'd been advised, and It makes all the noises it normally makes when manually slewing using the compass rose controls, just doesn't physically move the DEC axis. I removed the cover to the belt drive on the DEC motor and all seems to be moving there correctly, and the belt is not broken or anything.

I'm aware that as a beginner I may be missing something basic here, but the clutches were tight on both axes, which is the only basic error I know of that could cause this.

Anyone got a clue before I call the fire brigade??
--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Telrad.
28mm 2" and 12mm 1.25" lenses.
2 and 5 x Barlows.
Macbook air 
Huawei Android T5 Tablet
Nikon D3200 DSLR
Software: ExploreStars Android & WIndows, Stellarium OSX & Android, AstroDSLR


Dec axis motor system faulty or newbie error?? #EXOS2

Paul Mogg
 

Last night, the DEC axis motor system on my new Exos 2 PMC-8 mount seemed to develop a problem and  stopped moving that axis at all. I tested it again this morning and it's the same. The clutches were all tight as I'd been advised, and It makes all the noises it normally makes when manually slewing using the compass rose controls, just doesn't physically move the DEC axis. I removed the cover to the belt drive on the DEC motor and all seems to be moving there correctly, and the belt is not broken or anything.

I'm aware that as a beginner I may be missing something basic here, but the clutches were tight on both axes, which is the only basic error I know of that could cause this.

Anyone got a clue before I call the fire brigade??
--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Telrad.
28mm 2" and 12mm 1.25" lenses.
2 and 5 x Barlows.
Macbook air 
Huawei Android T5 Tablet
Nikon D3200 DSLR
Software: ExploreStars Android & WIndows, Stellarium OSX & Android, AstroDSLR


Re: Newbie Alignment issues - Explorestars Android #Android

Paul Mogg
 

Thanks for that Mikas, yes I get what you're saying, stick to basics at first, just get it to slew roughly to something. I thought I had gone through that stage with using the SYNC button to align on Mars which I had working previously, and then using the button controls to tune in more finely, but this only works for slewing small distances.

Unfortunately, after all of this last night, the DEC axis motor system seems now to have a problem and is not moving that axis at all. It makes all the noises it normally makes when manually slewing using the compass rose controls, and I removed the cover to the belt drive and all seems to be moving there correctly, just the head is not moving on that axis. I have both clutches all tightened as I was told they should be. I'll post about this elsewhere as if it is faulty I guess I'll have to send it back. Oh well, onward and upward.

--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Telrad.
28mm 2" and 12mm 1.25" lenses.
2 and 5 x Barlows.
Macbook air 
Huawei Android T5 Tablet
Nikon D3200 DSLR
Software: ExploreStars Android & WIndows, Stellarium OSX & Android, AstroDSLR


Re: #iEXOS-100 #iEXOS-100

Karol Trepala
 

I'm using 300mm lens with MFT camera. And I think you should take some margin for those times given by people here... I started just a few months ago my AP hobby, with small tracker star adventurer mini, and I could reach 15-20s exposures (however it was overloaded because my lens weight is 2,3kg), I switched to iexplorer counting on much better results, but at the beggining it was exactly the same (even with pollar alignment by dedicated pollar scope, which I bought as an additional accessory, and which I don't recomend), pollar alignment with this mount is a real pain in the ass. After some fight with the mount and pollar alignment by sharpcap, I can reach 30-40s exposures without autoguiding. Maybe beacuse of te smaller sensor than APSC, or because of my particular mount imperfections (I tried to adjust gears, but I can't eliminate completly movement on RA axis), Nevertheless in my opinion realisticly you can count on 30s exposures. If will be better, than good for you... In my case I swithed to autoguided exposures, but also in this case It isn't as good as I would like... 2-3 minutes are max what I could reach due to the backshlash on my the gear. Until now I have got only 1 night with clear sky, to test this autoguiding, so I hope I can improve this result. Nevertheless at your place I would recomend you to buy for the beggining some decent tracker with autoguide camera, play with it and in some time switch to less "budget" mount than iexos. From the other hand if you like to fight with your equipement and learn a lot about it, this may be a good option.


Re: Newbie Alignment issues - Explorestars Android #Android

Mikas
 

Hi Paul,

I'm not an expert at all but learned some things after struggling with Skywatcher EQ5 pro with Synscan and EOS-2 PMC-8. What I would do:
1 Forget about 2 or 3-star alignment for a while. You need it only for visual observation and more accurate pointing to deep sky objects.
2 Level your mount.
3 Approximately Polar align
4 Grab spirit level and lay it on an even surface. Turn level 180 degrees and make sure it shows the same as before. If not look for another one.
5 Carefully remove mount head, making sure tripod legs do not move.
6 Level tripod by placing the spirit level on top of it.
7 On Explorestars Android app:
Settings; Reset Alignment, make sure time is correct, Load GPS coordinates, check if you mount is selected.
Catalog; Solar, Mars, Slew to object
8 Don't touch any controls! With polar alignment azimuth and declaration adjustment screws only center Mars on your Nikon D3200.
9 Fine-tune centering with Explorestars Android buttons and press sync.
10 Set your Nikon D3200 DSLR to 720p 60fps and start recording video


Newbie Alignment issues - Explorestars Android #Android

Paul Mogg
 

Hi all,
I'm having Alignment issues, I just bought an EOS-2 PMC-8 mount a week or so ago and am still struggling to get it to basically work. ( I always preface with the fact that I'm a complete beginner to all this, though I've read a lot of material )

Having figured out how I think a 3 star alignment should be done on Explorestars, through reading lots of posts and watching videos ( as there is no user manual available ), last night I finally though, after more than an hour of leveling, balancing, collimating, Telrad alignment, polar alignment using the polar finder and an app and the Telrad, and finally 3 star alignment in Explorestars, that I had it down. The software told me I had completed the 3 star alignment. I then told it to slew the EOS-2 to Mars as a test, ...whereupon it immediately slewed back to the North star and it seemed all my hard work was for nothing, which was frustrating to say the least.

Most frustrating of all was that, having discovered the list of "Alignment Stars" presented by pressing the "Catalog" button, I noticed that the Search function was no longer available, I really need this as I only have a limited knowledge of constellations and names of stars at this point.

Anyway, so I am back to square one of only having limited success by using the "SYNC" button to do a "1 star alignment" on an object ( though I know that's not exactly what the SYNC button does ).

Any thoughts on what I might be doing wrong much appreciated. Thank you.
--
Location: southern Spain

Equipment:
Explore Scientific EOS-2 PMC-Eight mount
Skywatcher 200DPS Newtonian telescope
Macbook air 
Huawei Android T5 Tablet
Nikon D3200 DSLR
Software: ExploreStars Android & WIndows, Stellarium OSX & Android, AstroDSLR


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Doug Walker <espmc8@...>
 

On the setup screen, check the Motion Controls checkbox.

On 10/15/2020 10:09 PM, James Everson wrote:
Doug,

I couldn't find them. That said, when I clicked on the home button it did return the mount to the home position. So no reason to think the controls wouldn't work. Are the controls under the "telescope simulator"?

Thanks


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT
--
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: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

James
 

Doug,

I couldn't find them. That said, when I clicked on the home button it did return the mount to the home position. So no reason to think the controls wouldn't work. Are the controls under the "telescope simulator"?

Thanks


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Doug Walker <espmc8@...>
 

did the motion controls in POTH work?

On 10/15/2020 9:59 PM, James Everson wrote:
Doug,

I reran the ASCOM installer and installed the all the legacy components.





I was able to connect POTH over serial without issue. I then went back into PHD2 and pointed it at the POTH ASCOM device. Still no dice. The manual buttons do not move the mount. I tried setting POTH to parked/unparked and also toggled the tracking box.



Is there anything else to look at in POTH? Any other ideas?

Thanks


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT
--
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: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

James
 

Doug,

I reran the ASCOM installer and installed the all the legacy components.





I was able to connect POTH over serial without issue. I then went back into PHD2 and pointed it at the POTH ASCOM device. Still no dice. The manual buttons do not move the mount. I tried setting POTH to parked/unparked and also toggled the tracking box.



Is there anything else to look at in POTH? Any other ideas?

Thanks


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

James
 

Andreas 

Not sure what you mean. What client are you referring to?

Thanks



On Thu, Oct 15, 2020 at 7:12 PM Andreas Volz via groups.io <bassliner303=googlemail.com@groups.io> wrote:
Hmm, okay. 

Does the Device Hub at least show that there is some client connected to it? Should show up in the upper right corner. 

Regards,
Andreas 

James Everson <jeverson.biz@...> schrieb am Fr., 16. Okt. 2020, 01:03:
Andreas

I know it’s not checked in the image, but I tried both with and without it checked. I can certainly try again, but it didn’t seem to change the outcome.

Thanks 



On Thu, Oct 15, 2020 at 5:56 PM Andreas Volz via groups.io <bassliner303=googlemail.com@groups.io> wrote:
Think you need to check the "Tracking" checkbox.

<jeverson.biz@...> schrieb am Do., 15. Okt. 2020, 23:46:
Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Doug Walker <espmc8@...>
 

FWIW,

I had nothing but problems with guiding using the new Device Hub. Switched to POTH and haven't had an issue since. If you've installed the latest Ascom then you have to run the installer again and specifically select it from the Out of Date Hubs" section.



--
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: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

 

Could it still be in Park mode?

Chuck Lewis

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Andreas Volz via groups.io
Sent: Thursday, October 15, 2020 6:12 PM
To: MAIN@espmc-eight.groups.io
Subject: Re: [ESPMC-Eight] PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

 

Hmm, okay. 

 

Does the Device Hub at least show that there is some client connected to it? Should show up in the upper right corner. 

 

Regards,

Andreas 

 

James Everson <jeverson.biz@...> schrieb am Fr., 16. Okt. 2020, 01:03:

Andreas

 

I know it’s not checked in the image, but I tried both with and without it checked. I can certainly try again, but it didn’t seem to change the outcome.

 

Thanks 

 

 

 

On Thu, Oct 15, 2020 at 5:56 PM Andreas Volz via groups.io <bassliner303=googlemail.com@groups.io> wrote:

Think you need to check the "Tracking" checkbox.

<jeverson.biz@...> schrieb am Do., 15. Okt. 2020, 23:46:

Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


--

Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX

Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51

Guide Scope: Astromania 50mm Guidescope (190mm focal length)

Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)

Software: PHD2, ASCOM, and APT


--
Scope: Explore Scientific AR-102, Astro-Tech AD72ED, Nikon kit lenses
Mounts: Exos2GT-PMC8, Homebrew barndoor tracker
Camera: Nikon D7000, QHY5III-462C
S/W:  Backyard Nikon, DeepSkyStacker, Stellarium, CdC, PHD2, Sharpcap Pro, Gimp, RawTherapee


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Andreas Volz
 

Hmm, okay. 

Does the Device Hub at least show that there is some client connected to it? Should show up in the upper right corner. 

Regards,
Andreas 

James Everson <jeverson.biz@...> schrieb am Fr., 16. Okt. 2020, 01:03:

Andreas

I know it’s not checked in the image, but I tried both with and without it checked. I can certainly try again, but it didn’t seem to change the outcome.

Thanks 



On Thu, Oct 15, 2020 at 5:56 PM Andreas Volz via groups.io <bassliner303=googlemail.com@groups.io> wrote:
Think you need to check the "Tracking" checkbox.

<jeverson.biz@...> schrieb am Do., 15. Okt. 2020, 23:46:
Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

James
 

Andreas

I know it’s not checked in the image, but I tried both with and without it checked. I can certainly try again, but it didn’t seem to change the outcome.

Thanks 



On Thu, Oct 15, 2020 at 5:56 PM Andreas Volz via groups.io <bassliner303=googlemail.com@groups.io> wrote:
Think you need to check the "Tracking" checkbox.

<jeverson.biz@...> schrieb am Do., 15. Okt. 2020, 23:46:
Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


--
Mounts: Explore Scientific EXOS II GT, iEXOS-100, Celestron AVX
Scope: Explore Scientific AR102, AR152, FirstLight 152mm Mak-Cassegrain, SpaceCat 51
Guide Scope: Astromania 50mm Guidescope (190mm focal length)
Guide Camera: ZWO ASI120MM Mini Monochrome
Camera: Canon RP (IR modification)
Software: PHD2, ASCOM, and APT


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

Andreas Volz
 

Think you need to check the "Tracking" checkbox.

<jeverson.biz@...> schrieb am Do., 15. Okt. 2020, 23:46:

Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


Re: PHD2 stopped talking to my mount #EXOS2 #OpenGOTO #pmc-eight #ASCOM

James
 

Jerry,

OK. So I connected to my PMC8 module with the DB9 cable. Then I opened ES PMC8 Config Manager and enabled serial mode and disconnected from wifi.


Then I opened the ASCOM Device HUB (replaces POTH in ASCOM 6.5+). Went to setup. Selected the PMC8 ASCOM device. Went into settings and made sure that serial connection was selected.






I was able to move the mount from the HUB console. I then opened PHD2 and connected it to the ASCOM Device as you suggested.



I then brought up the manual guiding control in PHD2 but could not move the mount with the PHD2 controls.



What would you recommend from here?

Thank you


Re: Ghetto azimuth adjuster #iEXOS-100

Lutz Paelke
 

Parag Modi:
Like Jacqui already said, there is an M8 screw in the base of the tripod. Remove this screw and my design attaches to it with an M8x25 mm cylinder head screw. My design has a recess for the head of such a screw. There are some pictures on the thiniverse page I linked to above.
To push the mount left or right, I use two M6x30 mm Nylon knurled-head screws.


Re: Ghetto azimuth adjuster #iEXOS-100

Aaron Thompson
 

I have worked with a 3d printer a lot over the last few years.  Another great material for rigidity and strength are the Nylon filaments.  Once you are able to tune your printer in to their characteristics they are rigid and very strong.  It is also somewhat slippery in that it is very good for gears and does not bind like abs.

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