EAF Backlash

Focusers, Filters, Barlows etc..

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atacamastar
Posts: 10
Joined: Tue Jan 02, 2018 1:50 am

EAF Backlash

Post by atacamastar » Wed Feb 26, 2020 5:16 pm

My EAF has what seems to be excessive play - see attached video - Any assistance is appreciated - Thanks!
EAF Backlash.mp4
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Support1@ZWO
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Backlash

Post by Support1@ZWO » Thu Feb 27, 2020 2:09 am

Hi
The backlash which can be calibrate in software.
And when there is more load the backlash also will be more obvious.

atacamastar
Posts: 10
Joined: Tue Jan 02, 2018 1:50 am

Re: EAF Backlash

Post by atacamastar » Thu Feb 27, 2020 2:44 am

The in backlash is 220 steps and the out is 240 steps --that is ridiculously large

atacamastar
Posts: 10
Joined: Tue Jan 02, 2018 1:50 am

Re: EAF Backlash

Post by atacamastar » Fri Feb 28, 2020 6:09 am

Sam or Sean -- is this large amount of backlash considered to be an issue that should be covered by the warranty? The folks at OPT where I purchased the EAF are willing to replace the EAF if ZWO considers this amount of backlash to be a defect covered b the warranty -please respond -- Thank you!

Support1@ZWO
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Backlash

Post by Support1@ZWO » Mon Mar 02, 2020 10:22 am

Please make sure the shaft is fixed with screw, connected tightly and the payload cannot be over 5Kg.

atacamastar
Posts: 10
Joined: Tue Jan 02, 2018 1:50 am

Re: EAF Backlash

Post by atacamastar » Mon Mar 02, 2020 3:10 pm

The payload is an ASI1600 and EFW -- total weight under 5kg.

The coupling is screwed down tightly on both the EAF and the focus knob.

That is not the issue. When NOT under load, the spindle has about ¼” free play. That free play translates into about a 240 step backlash – that is excessive.

Please confirm that is not within an acceptable tolerance and OPT will replace it for me and ZWO will not have to do anything.

Support1@ZWO
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Backlash

Post by Support1@ZWO » Fri Mar 06, 2020 10:42 am

I think we have sloved this via email.

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