Matrix MOW800 PCB Holder

[LaurentS]

I have printed the PCB holder, it looks good.

I'm testing an holder with rubber dampers. And just an other idea... I will test it: to tilt the power board for more access, better cooling and more distance from cover.

 

[LaurentS]

And just an other idea... I will test it: to tilt the power board for more access, better cooling and more distance from cover.

Bad idea, if we add connectors on the PCB we don't have enough place in this case; I stay on my last version with dampers.
In all cases I have to change my connectors, they are too high, they don't have to be higher than the PCB

 

[LaurentS]

Sascha, for J7, J9 and J10, I will directly weld on PCB, connectors are too high.

 

[Sascha]

Did you have a Photo?

 

[Bernard]

I hope for you that PCB don't make high EMF noise on the receiver coil.
it 's better to first test the perimeter receiver signal before fix all the component in the chassis.
Sometime moving a wire for 2 cm can change the noise in the coil !!

 

[Sascha]

You are certainly right, but unfortunately the housing is not a miracle of space.
Maybe the receiver can be placed a little further out from the bottom, but it will definitely be under the PCB.
But I wonder how other manufacturers do it? The receivers usually sit on top of the PCB?

 

[LaurentS]

Did you have a Photo?

If I measured correctly, we have 68mm from 3Dprint base to under the cover. With our connectors, we have 70mm. To be sure to have enough place under the cover, it would be better to weld directly on the PCB for J4, J6, J7, J9 and J10. Connectors can be added on wires if needed.

 

[LaurentS]

I hope for you that PCB don't make high EMF noise on the receiver coil.
it 's better to first test the perimeter receiver signal before fix all the component in the chassis.
Sometime moving a wire for 2 cm can change the noise in the coil !!

I've seen a video from you about this signal, if I'm right... I will watch this. I think about fixing the coil out of the housing... if it's possible to do this... the sensor out and the print card in the housing... .

Video from MegaBernard

 

[LaurentS]

I thought about installing the sensor at the bottom/between the loading padds.

 

[Bernard]

OK.
Maybe you can use the vertical box from my robomow with minor change.

 

[Bernard]

Inside Arduremote Test ODO menu you have the Peri Mag/Noise value.
Noise need to be the minimum when you test the wheel.
According to video Try to put DC/DC 24/5V far from coil

 

[Sascha]

I was lucky and soldered the right two the wrong way round. The left one fits the height.

 

[LaurentS]

On each top side, you have the possibility to attach the PCB with a Rilsan strap.

 

[Sascha]

Rather narrow

@LaurentS Did you test if the USB Cable fit in the Teensy? the way i have the pcb in it does not fit

 

[LaurentS]

I didn't, but an angled connector should do the job without problems.

Exemple 1

Exemple 2

Many connectors are available to connect as necessary, micro usb to micro usb, micro usb to usb, etc... .

 

[LaurentS]

Exemple 3

 

[Sascha]

Thank you, I did not know them at all

 

[LaurentS]

OK.
Maybe you can use the vertical box from my robomow with minor change.

Thanks Bernard, yes, perfect with minor change: for Mow800, with the possibility to bore a 6mm hole in the center to fix it.

 

[LaurentS]

Side screws for cover can't be installed; not enough place for thoseones, but it fits so nicely that I think I will glue it in place after the PCB resistor has been adjusted and the condensator has been bridged.

 

[LaurentS]

I will add a box for the Pn5180 NFC RFID on the back; the wires will go through the previous 6mm hole and the box will be screwed on other points. It will be one piece for both sensors.