Author Topic: AP Mach1 GTO Body Changes?  (Read 162 times)

carmiphypart

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AP Mach1 GTO Body Changes?
« on: December 24, 2017, 03:04:16 PM »
Hi. I am looking at a 2007 AP Mach1 model and was wondering, aside from the control box, have there been numerous changes mechanically in the 10 years since this model was made?  So far as I could tell from pictures, the 2007 and 2017 models look identical so I am presuming the only changes over the years are in firmware/electronics?

Thanks,
Tom



Miguel Alvarado

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Re: AP Mach1 GTO Body Changes?
« Reply #1 on: January 04, 2018, 07:34:55 AM »
1) precision azimuth adjuster, a 2007 may not have it (came around 2010-2011)

2) new style motor box with worm disengagement lever (2016?)

The good news is that an original Mach1 can be upgraded to the latest by buying the upgrade parts from AP.

Richard Ross

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Re: AP Mach1 GTO Body Changes?
« Reply #2 on: January 08, 2018, 01:54:10 AM »
The Azimuth adjuster was a nice change and A-P sold kits so we could do the mod ourselves. This photo from 2011 shows how the azimuth knobs were moved to the back end of the mount to allow easier access.

I also added the RAPAS (Right angle polar scope) a couple years later and polar alignments are a breeze.

Cheers,

Ron

Damon Brigham

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Re: AP Mach1 GTO Body Changes?
« Reply #3 on: January 08, 2018, 05:38:35 PM »
Quote
Hi. I am looking at a 2007 AP Mach1 model and was wondering, besides the control box, have there been many changes mechanically in the 10 years since this model was made? As far as I can tell from pictures, the 2007 and 2017 models look identical so I'm thinking the only changes over the years have been in firmware/electronics?

Thanks,
Tom

I think it would be a safe investment, if the price is right.

You can add the upgrade bits as desired over time. RAPAS & AZ adjuster. And don't for get the CP4 upgrade! With it's USB, Ethernet, WiFi, safety slew logic, AUX input for home switches, abs. encoders, etc. and more. I really look forward to the home/limit switch support when it becomes available.

ecapwaiwa

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Re: AP Mach1 GTO Body Changes?
« Reply #4 on: January 10, 2018, 11:45:17 PM »
CP4 supports home/limit switches? Sold!

David Reynolds

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Re: AP Mach1 GTO Body Changes?
« Reply #5 on: January 11, 2018, 06:14:23 AM »
When would one use the home or the limit switches?

And what is the difference betweenprecision azimuth adjuster and the old one?

Thanks!

wordpuzzlesubc

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Re: AP Mach1 GTO Body Changes?
« Reply #6 on: January 11, 2018, 07:38:35 AM »
Quote
When would one use the home or the limit switches?
In a remote observatory.

Michael Consumers

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Re: AP Mach1 GTO Body Changes?
« Reply #7 on: January 11, 2018, 08:55:12 AM »
Quote
When would one use the home or the limit switches?

And what is the difference betweenprecision azimuth adjuster and the old one?

Thanks!

I don't know how good the old one was, but to give you an idea about the new one, when Sharpcap says I'm 3 arc-sec from the pole, I don't hesitate to adjust, knowing I will not overshoot.

I do accept 1 arc-sec, but then I'm naturally on the cowardly, er, conservative side

ndesevtenzio

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Re: AP Mach1 GTO Body Changes?
« Reply #8 on: January 11, 2018, 11:02:17 AM »
that’s probably 1 arc minute. the PA adjuster is 3 arc minutes per ridge on the knob...
1 arcsec from the pole is hard to measure, seeing alone would perturb that number.

Chad Fithian

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Re: AP Mach1 GTO Body Changes?
« Reply #9 on: January 11, 2018, 11:13:30 AM »
Quote
CP4 supports home/limit switches? Sold!

The CP4 has the inputs and AP has promised home/limit switch upgrade kits for the 1100 and 1600 mounts.

We don't know about older 900/1200/Mach1 mounts yet.

Once the kits are announced I am pretty sure I can figure out how to exploit the CP4 AUX input on older mounts, just in case AP doesn't do it.

witchcycsuti

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Re: AP Mach1 GTO Body Changes?
« Reply #10 on: January 12, 2018, 03:56:48 AM »
Quote
When would one use the home or the limit switches?

And what is the difference betweenprecision azimuth adjuster and the old one?

Thanks!

Home/limit switches aren't really needed on AP mounts but some people really want them anyway so AP has bent to pressure and will be releasing home/limit switch upgrade kits for the 1100/1600 mounts and possibly for some older models. The CP4 has the inputs but they are not yet documented and can't be reverse-engineered until someone gets a switch kit and traces the wiring on the connector.

The newer AZ adjuster design is slightly easier to operate than the old design. More leverage makes the knobs easier to turn and they have been moved back by the polar scope for more convenient access. Its a nice upgrade but not a critical one.

Nathan Mayienda

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Re: AP Mach1 GTO Body Changes?
« Reply #11 on: January 13, 2018, 06:08:25 AM »
Quote
2) new style motor box with worm disengagement lever (2016?)
From http://www.astro-phy...ch1gto/mach1gto

Spring-loaded worms maintain full contact under all guiding and slewing conditions
Automatic setting for worm mesh requires no adjustments over long time periods
I am looking forward to having this ( my Mach1GTO might ship tomorrow  ) My current mount has horrific backlash, serious runout in the dec axis gear so I can't make the worm snug everywhere, and with temp variations in winter that mount will just get worse.

Richard Washington

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Re: AP Mach1 GTO Body Changes?
« Reply #12 on: January 13, 2018, 02:20:30 PM »
The AZ upgrade was a much needed 'fix'. I've posted years ago on how much a difference it made in aligning the mount. Before getting a PoleMaster, I used Alignmaster and when using the various star pairs it was a minor pain to make the adjustments needed during the various iterations to refine the alignment. With the PM, it's a non-issue since the alignment is typically a 'do it once and go'...

alnepensa

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Re: AP Mach1 GTO Body Changes?
« Reply #13 on: January 23, 2018, 11:19:52 AM »
actually even the older Mach1's had spring loaded worms to the best of my knowledge. backlash has certainly never been an issue.

adjusting the mesh is a simple one-tool operation, so not having to do this is a convenience but not earth-shattering.

Quote
2) new style motor box with worm disengagement lever (2016?)
From http://www.astro-phy...ch1gto/mach1gto

Spring-loaded worms maintain full contact under all guiding and slewing conditions
Automatic setting for worm mesh requires no adjustments over long time periods
I am looking forward to having this ( my Mach1GTO might ship tomorrow  ) My current mount has horrific backlash, serious runout in the dec axis gear so I can't make the worm snug everywhere, and with temp variations in winter that mount will just get worse.[/quote]

Anthony Eppinger

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Re: AP Mach1 GTO Body Changes?
« Reply #14 on: January 23, 2018, 03:11:34 PM »
Quote
that’s probably 1 arc minute. the PA adjuster is 3 arc minutes per ridge on the knob...
1 arcsec from the pole is hard to measure, seeing alone would perturb that number.

No, arc-*second*. The knobs are that sensitive.

I typically polar align with Polemaster, and then switch to Sharpcap to fine-tune it even further. Usually I'm within 1 arc-min (by Sharpcap's reckoning) after PM, and I dial it in to within 3-5 arcsecs (it's iterative if my level is not perfect, so eventually I get bored).

And yes, seeing does fluctuate the number when it gets that close, but it's fun to try to get that perfect score