LIS3DSH placement

dc42

@tecno post https://forum.duet3d.com/post/250874 shows how I mounted an accelerometer on my Smart Effector.

tecno

Need to think outside the box for a good solution, as you can see it is quite crowded.

oliof

@tecno You got a hotend cooling fan on the hotend? I made an adapter to mount the accelerometer using two of the fan bolts.

tecno

@oliof
This hotend is watercooled.

oliof

@tecno please show the effector from below anyways, maybe there is a way there.

tecno

@oliof
Only way is this on photo. Y axis is on my hand side, is this OK as I can not place the board in other direction.

tecno

I have managed to place the LIS3DSH board and made cabling for it.

M955 P0 is OK
Trying M956 command fails to start data collection.

Is this lacking Ixx info in config?

tecno

tecno

Now this

The accelerometer is OK, tested on other printer.
Used multimeter to verify connection pin to pin.

Tried another IO for CS/INT

tecno

@dc42
Is there a way to test port functionality for accelerometer on Mini5+ Lan version

I suspect that something is wrong with this board as it will not function.

dc42

@tecno are you using the same cabling on both machines, or different cabling? The most common issue we see with these accelerometers is that the CS signal is sensitive to noise, which it can pick up from other signals in the same cable. Better cabling fixes the problem, however a small capacitor between CS and ground on the LIS3D[S]H board would probably fix it too. 220pF might be a suitable value.

tecno

@dc42
Two different cabling, on this Delta I have two different shielded cables one for VCC/GND/CS shield grounded on Duet side.

Will try cap

tecno

@dc42

Same with cap CS to GND /// This does not work on my Chiron. May wrong value cap

dc42

@tecno you could try 470pF or even 1nF. If that still doesn't work then I would suspect a bad connection.

The error message you reported earlier concerning INT1 suggests that the INT line was not connected or was not configured correctly.

tecno

@dc42
Will do, back shortly. PS did work on my chiron !

tecno

@dc42 said in LIS3DSH placement:

470pF or even 1nF

Sorry NoGo

tecno

@dc42

Just made a very short cable just to verify if port on Duet board is busted or not = it is not.

So the long cable I have is just too much ~2.10m, Maybe I can cut it down to ~1.6m, need to have space to move all axis for input shaping.

tecno

Did cut down the cable = NoGo

tecno

Is it really that bad that my accelerometer boards are useless due to cable lenght?

Is there any development as regards Smart effector to include accelerometer?

dc42

@tecno I am pushing for the combined Smart Effector and tool board to be done soon. We will increase the size and the rod spacing (perhaps from 55 to 70mm) to accommodate a small direct drive extruder, and maybe change the hot end mounting to suit the E3D Revo Voron hot end. Does that sound OK?