I know this has been covered before!

[Yag]

But I can't find the thread!

I've only just started to use my fB3 in anger, and I noticed that I can't get anything like the image size (galvo deflection) that I do on my Moncha, Alphalite or Chameleon Tech controllers.

I know that this has been mentioned before, but was their a reason and/or a solution to this? It seems a shame to have my Wide Move scanners not going wide!

If anyone remembers the previous thread, and has a link, that would be great!

Many thanks

Rob

[dave]

The reason is the FB3 is single ended, whilst the others are not.

The easiest solution is to get the differential add on board to suit from Pangolin. Or adjust the input gain of the scanamps

But I can't find the thread!

I've only just started to use my fB3 in anger, and I noticed that I can't get anything like the image size (galvo deflection) that I do on my Moncha, Alphalite or Chameleon Tech controllers.

I know that this has been mentioned before, but was their a reason and/or a solution to this? It seems a shame to have my Wide Move scanners not going wide!

If anyone remembers the previous thread, and has a link, that would be great!

Many thanks

Rob

[Yag]

The reason is the FB3 is single ended, whilst the others are not.

The easiest solution is to get the differential add on board to suit from Pangolin. Or adjust the input gain of the scanamps

I'd not heard of the differntial add on board, I will look in to that!

I have wound up the "size" pot on the scanners in the projector I am currently using, but as I chop and change controllers and projectors, I will have to remember that I did that!

Thanks.

[Pangolin]

Hi all,

Actually this is a bit of a misnomer. SOME! FB3 are single ended, but not all.

For the FB3-SE (board-level product), the most recent ones we ship include a differential daughterboard. For the FB3-XE (external box version) these have always been differential.

Unfortunately saying "FB3" by itself isn't enough...

Bill

[Yag]

Hi all,

Actually this is a bit of a misnomer. SOME! FB3 are single ended, but not all.

For the FB3-SE (board-level product), the most recent ones we ship include a differential daughterboard. For the FB3-XE (external box version) these have always been differential.

Unfortunately saying "FB3" by itself isn't enough...

Bill

Ahh, I guess I have an earlier one!

Can the differential output be retro-fitted to the earlier boards?

[Pangolin]

Yes, sure, no problem. But normally shipping costs overwhelm the cost of the diff board itself...

Making an op-amp inverter circuit and then connecting it yourself is probably a quicker and less expensive way to go, especially if you have soldering skills. It would only be a single inegrated circuit (dual op-amp) and four resistors.

Bill

[Yag]

Yes, sure, no problem. But normally shipping costs overwhelm the cost of the diff board itself...

Making an op-amp inverter circuit and then connecting it yourself is probably a quicker and less expensive way to go, especially if you have soldering skills. It would only be a single inegrated circuit (dual op-amp) and four resistors.

Bill

That sounds easy enough, you wouldn't happen to have a circuit diagram/parts list to hand would you, or could point me at a suitable one?

Many thanks

[SideFX]

Making an op-amp inverter circuit and then connecting it yourself is probably a quicker and less expensive way to go, especially if you have soldering skills. It would only be a single inegrated circuit (dual op-amp) and four resistors.

This is what I did.. i was etching a circuitboard anyway for other peripheral tasks.. so an opamp was easily added But for future projects a differential output on the FB3 would be the way to go.. less complexity

[Yag]

This is what I did.. i was etching a circuitboard anyway for other peripheral tasks.. so an opamp was easily added But for future projects a differential output on the FB3 would be the way to go.. less complexity

Would you be willing to share the circuit you used please?