Usals problem & alignment

[Channel Hopper]

Unless the supplier can send you proof that the dish is manufactured with such dimensions (perhaps with a technical drawing to back up their claims), then it is not fit for purpose and should be refunded (with collection/return at their cost/your convenience).
Don't believe the Ts and Cs they may throw at you.

 

[Red alert]

Unless the supplier can send you proof that the dish is manufactured with such dimensions (perhaps with a technical drawing to back up their claims), then it is not fit for purpose and should be refunded (with collection/return at their cost/your convenience).
Don't believe the Ts and Cs they may throw at you.

Not received any response from hm-sat in regards to tech specs or if he will cover expense of sending him the lnb arm. Just ignoring my emails now. What great after sales service. I also asked him if he could measure the arm of other Gibertini dishes and no reply either.
I contacted Gibertini but no reply from them either. So now I have no choice but look for a 2nd hand arm maybe on ebay? I should have stuck with UK based seller. Or should have gone for a different dish. Its frustrating.
Any new member who reads this and decides to get a Gibertini dish from Hm-sat-shop my recommendation is dont. Look elsewhere.

 

[Channel Hopper]

You could try a chargeback on the card you made payment with, or take it up with the promoted payment option if bought through a certain auction site.

Gibertini are located not far from the centre of the pandemic in Italy, Whilst there is talk of the relaxing of the lockdown I doubt you would get a response from the manufacturer. The responsibility for your troubles do lie with the supplier though, echoing the earlier experiences by other forum members.

 

[jeallen01]

@Red alert

Another "Left of centre" thought! If the correct replacement arm is not likely to become available, then how about cutting the current arm into 2 sections and inserting some form of "extension"?

If you can find an approx 120-150mm length of steel (or aluminium) channel that will fit fairly snugly over the arm then you could bolt that to the dish-side section and the LNB-side section to provide the extension.

You might even get away with steel straps bolted on both vertical sides of the 2 sections - and if you used perforated steel straps you might be able to incorporate an adjustable extension so as to be able to "fine-tune" the arm length (perforated steel car exhaust straps come to mind here)

Words of warning : if you do this, you would need to cut the arm as near as possible to the LNB end to minimise the bending moment on the extension piece, and drill the holes for the securing bolts before you cut the arm as it will be far more rigid before than after cutting. .

 

[Channel Hopper]

Only after the refund is safely banked.

 

[Red alert]

You could try a chargeback on the card you made payment with, or take it up with the promoted payment option if bought through a certain auction site.

Gibertini are located not far from the centre of the pandemic in Italy, Whilst there is talk of the relaxing of the lockdown I doubt you would get a response from the manufacturer. The responsibility for your troubles do lie with the supplier though, echoing the earlier experiences by other forum members.

I purchased direct from HM-sat. I paid using paypal so they might be an option.

You are right about them being located close to pandemic. Whenever they are up and running im sure they will reply.

 

[Red alert]

@Red alert

Another "Left of centre" thought! If the correct replacement arm is not likely to become available, then how about cutting the current arm into 2 sections and inserting some form of "extension"?

If you can find an approx 120-150mm length of steel (or aluminium) channel that will fit fairly snugly over the arm then you could bolt that to the dish-side section and the LNB-side section to provide the extension.

You might even get away with steel straps bolted on both vertical sides of the 2 sections - and if you used perforated steel straps you might be able to incorporate an adjustable extension so as to be able to "fine-tune" the arm length (perforated steel car exhaust straps come to mind here)

Words of warning : if you do this, you would need to cut the arm as near as possible to the LNB end to minimise the bending moment on the extension piece, and drill the holes for the securing bolts before you cut the arm as it will be far more rigid before than after cutting. .

Thanks for taking the time to write this. This is an option and will check for parts. See what I have lying around in the shed.

 

[jeallen01]

@Red alert

You might find useful stuff at B&Q (diy.com) under "Builders Metalwork" - I've found the "Expamet" galvanised steel straps and joist struts to be very useful for a lot of stiftening and stabilising jobs around dishes.

Also the smaller ones like Search results | DIY at B&Q

 

[a33]

Another "Left of centre" thought! If the correct replacement arm is not likely to become available, then how about cutting the current arm into 2 sections and inserting some form of "extension"?

Apart from being 'longer', the arm could also have another angle to the dish.
So always first measure the dish, and calculate (new) focal point position.

Greetz,
A33

 

[jeallen01]

Apart from being 'longer', the arm could also have another angle to the dish.
So always first measure the dish, and calculate (new) focal point position.

Greetz,
A33

Did not @Trust, in post #275, appear to confirm that that angle is correct in the current configuration?, Thus, if the extension results in the the arm still being truly "straight" from end to end, then that should mean that the angle is still correct, or am I totally misunderstanding the situation?

 

[Channel Hopper]

Different arm lengths on the same offset reflector will change the angle of dangle. Gibertini only have two numbers as far as I recall from my time with the brand and the difference would equate to mm, not cms.

 

[jeallen01]

Different arm lengths on the same offset reflector will change the angle of dangle. Gibertini only have two numbers as far as I recall from my time with the brand and the difference would equate to mm, not cms.

If @Red alert could make the length of the extension to be adjustable, then that would probably provide a sufficient degree of adjustment.

 

[Channel Hopper]

The feed arm length is tied to the parabola formula for the reflector.
Keep up !

 

[a33]

Did not @Trust, in post #275, appear to confirm that that angle is correct in the current configuration?, Thus, if the extension results in the the arm still being truly "straight" from end to end, then that should mean that the angle is still correct, or am I totally misunderstanding the situation?

Well yes, that could be right. I must give you that.
Maybe just add length to the arm is sufficient.

But if you do not have a perfect example of how it should be right in front of your eyes, so that you know that the assumption that the new arm is just longer and straight is perfectly true, and that the part of the arm-holder that is attached to the dish is in fact the original one belonging to this very dish, I'd want to be double sure, after all the pain that it caused already.
Measuring width and height is easy enough, measuring depth at the center precisely is a bit harder; entering those inputs in a calculator is peanuts.

Greetz,
A33

 

[jeallen01]

@Channel Hopper & a33

FWIW, do remember that, this morning, I did say something along the lines of "if there's no realistic alternative to the correct feedarm" about the possible alternatives - thus "anything probably goes ATM" in terms of what will actually work, and so let's see what @Red alert decides to try.

 

[Channel Hopper]

Well yes, that could be right. I must give you that.
Maybe just add length to the arm is sufficient.

But if you do not have a perfect example of how it should be right in front of your eyes, so that you know that the assumption that the new arm is just longer and straight is perfectly true, and that the part of the arm-holder that is attached to the dish is in fact the original one belonging to this very dish, I'd want to be double sure, after all the pain that it caused already.
Measuring width and height is easy enough, measuring depth at the center precisely is a bit harder; entering those inputs in a calculator is peanuts.

Greetz,
A33

Perhaps, perhaps not.

If that arm + feed holder is part of a completely different design of reflector design, or perhaps a limited number of generic knock offs using a 3D print feed clamp with indifferent angles, then no matter if the correct focal point is found and utilised, the dish will not perform to the specifications given by the manufacturer.


Is there any original looking paperwork from Gibertini in the box(es) or was the purchase secured on little more than the good name of the company ?

 

[jeallen01]

IIRC, all I suggested was that the existing, and thus "too-short", arm could be extended to the correct length for @Red alert's dish - after all, I doubt, or at least I hope, that the arm that was supplied was a genuine Gibertini one, and not a "knockoff", because all XP-series dishes appear to have virtually identical offset angles.

 

[Channel Hopper]

IIRC, all I suggested was that the existing, and thus "too-short", arm could be extended to the correct length for @Red alert's dish - after all, I doubt, or at least I hope, that the arm that was supplied was a genuine Gibertini one, and not a "knockoff", because all XP-series dishes appear to have virtually identical offset angles.

Could be so because this is the seller's response to my initial query on the listing
"the dish face is supplied to me seperate from the rest of the parts.....

Bargain Second-Hand Big Dishes For Sale

I dream... It would be a tragedy for it to end in land fill.

www.satellites.co.uk

 

[jeallen01]

@Channel Hopper

Nothing to do with the current issue - HM Sat in Germany was the supplier, and not HiSat in Harlech!

 

[Lazarus]

@Channel Hopper

Nothing to do with the current issue - HM Sat in Germany was the supplier, and not HiSat in Harlech!

And Germany is at least four times the size of Wales