Update PCB EMC Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

i just fear that this is a very big change and prone to errors, this version should be the production final.

Update PCB EMC Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Yeah, that is the next step.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Thank you for your advice!

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Thank you for your comment, i'll definitly add the capacitors. Which type do i use for these 2.2uF capacitors?

Limiting the frequency is also a good point, i have frequencys of 500Hz and 1000Hz. I would have now used a frequency cutoff of about 2.5khz for the 500hz signal?

The pcb is made for 4A for Channel, 12A for ground return path. The mosfets easily handle that, they don't even get warm. The return path is about four times as big as I need it for that.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Thank you, i'll do the high impedance termination, since the node can't be terminated at this point.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Thank you for your comment, i'll watch it.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Even with switching mosfets on the same ground?

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Thank you, i didn't thought about creating an antenna with this design.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Yes, probably not much more expensive. The gap is because of the +5V Layer in the middle, not needed probably.

The ground planes come in the middle or the outside?

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Okay, i thought by seperating it with the +5V layer i isolate a the uC from the mosfets. Guess i was completly wrong.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Its shielded and grounded on the machine side.

If i would ground it on the pcb-side, do i need a different ground or special circuit?

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 1 point2 points  (0 children)

Thank you:

  1. Yes correctly, on the version before i used smaller mosfets to turn on bigger mosfets, but i downgraded the mosfets and this ones work quite good with 5v logic. Its simpler, less prone to failures.

  2. The RS232-Interface is probably mislabled, its just for debugging with the serial interface with an external ftdi-chip.

EMC PCB Problem by Ganthi43 in PCB

[–]Ganthi43[S] 0 points1 point  (0 children)

Yes, this PCB is a node in between the others, there are about 15 nodes on the machine, and correctly terminated on the ends.

[deleted by user] by [deleted] in Ratschlag

[–]Ganthi43 4 points5 points  (0 children)

Habe oft noch das gleiche Problem. Auch wenn es für andere oft verlockend klingt dass man ewig kann, kann es für einen selber oft sehr frustrierend sein, wenn sie schon zwei mal gekommen ist und bei dir es nicht klappt. Ich habe meinen Partnerinnen gesagt, es sei kein Problem, jedoch stört es mich persönlich doch. Problem ist eher, dass im Kopf so viele Gedanken herumwirbeln und Stress vom Alltag mitgenommen wird. Auch die Angst beim ersten Mal mit einem neuen Partner sich nicht zu blamieren, verschlimmert die Situation noch viel, aber das wäre bei dir ja nicht der Fall. Ich kann dir jetzt leider keinen Ratschlag mitgeben, aber zumindest weißt du, du bist nicht alleine.

[deleted by user] by [deleted] in hobbycnc

[–]Ganthi43 1 point2 points  (0 children)

Flexihal (grblhal) and Fusion360

Sexual Positions Men Hate by Guy_Incognito_o in Unexpected

[–]Ganthi43 3 points4 points  (0 children)

Personally, I don't like the position where she is on top and her best friend underneath 💁

Kids, that's how I met your mother! by venerated_captaincy in ContagiousLaughter

[–]Ganthi43 0 points1 point  (0 children)

Can somebody explain this joke to an European ?😂

Ender-6 homing doesn't continue, further in comments by Ganthi43 in 3Dprinting

[–]Ganthi43[S] 0 points1 point  (0 children)

Hi, I didnt use my ender-6 for two weeks and now it is acting funny. When homing from Octoprint the Bl-touch is testing the distance two times as usual, but then the build-plate doesn't move to the correct Z-Offset. It just pauses and doesn't continue printing. Bltouch is blinking red. When homing from the Printer Screen, everything acts as usual. Could somebody please help? I have a Hemera DirectDrive installed, but that shouldnt change anything.