XCore Exchange

Hey folks,

timing is very much depending on the rotation speed.
If speed is not to high we only have left to know the actual display position.
I 0 point sensor and a step motor can solve this.

Vibrations and their source (balancing) is some thing we have to look a little more into.

The last one was mentioned by Marcus. How do we get the data to the display?
if we have it rotating we need to find a good way connecting pixel information and power to it.

INteresting approach but some challanges to be sorted ;-)

See you around
Frank

franksanderdo wrote:Hey folks,

timing is very much depending on the rotation speed.
If speed is not to high we only have left to know the actual display position.
I 0 point sensor and a step motor can solve this.

Vibrations and their source (balancing) is some thing we have to look a little more into.

The last one was mentioned by Marcus. How do we get the data to the display?
if we have it rotating we need to find a good way connecting pixel information and power to it.

INteresting approach but some challanges to be sorted ;-)

See you around
Frank

I do not think that vibrations are a real problem. Using good mechanical engineering (solid construction) and a well balanced rotator it is no problem.
I also do not really think that a stepper motor is needed. A DC or brushless motor is enough since we do not need a precise positioning or a very precise speed. It is enough to just know where each pixel is at a given time.
Using some kind of either rotary encoder or some kind of rotation trigger should be nough - SpikePOV uses the same pattern quite successful.
But I am really curious how to get the data there (power can be delivered by sliding contacts since noise or even short dropouts can be bearable - in contrast to the data connection - and I do no think that any wifi or bluetooth or similar connection is a viable way).

Marcus

Hi folks,

and if we have the core rotating with it?
I believe then we can use some wireless connection to get the data to it.

See you around
Frank

I've been stuck on the problem of transitioning power & data into the rotating segment for a little while now, I immediately thought of a brush system but I think it would be too unreliable especially with prolonged use..

I'm interested to know how others have solved this issue as it's a stepping stone for almost all POV displays.

worst case we put a battery in the rotor :mrgreen:

Power can perhaps be coupled using simple coils & rectifying the resulting AC.
I do not think that data survise this treamtent ;)

just playing here with laser and data transmission.... that might be another way :shock:

see you aorund
Frank

hmm,

a laser might be a bit oversized. But a light emitting and a light detecting diode might be a very interesting and useful idea!

btw: Do we need a rotating matrix?
I think a line can reach any point in a cylinder (if the line is tilted against the rotation axis) - which is enough for us?

Another btw: If we use a lightpipe as axis we can easily introduce light to be read out by the rotating object?!

Hi Marcus,

sorry you lost me. YOu have an example, sketch?
Somthing a stupid electrcian can look at? ;)

See you around
Frank