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I did not do much debugging yet I'm surprised that it works relatively well for the first try. I'm just collecting information what I can do.
EMC and signal integrity is on another level once you have power electronics involved.
Do you remember were the chokes in the system you saw back then installed on each single driver input? I have those 3 servos now and they're just wired up without any external filter installed.
I attached some quick drawing about the setup it's about a pick and place machine.
https://streamable.com/hzuxuf
Before I had some low voltage motors installed, now I'm able to have 3x the acceleration and 2x the max speed with those motors. But the additional offset of 0.5mm hurts usually I'm...
I don't have PE/GND in that room at all unfortuantely.
The motordriver is a JAND4002 (400W 220V)
The cables are probably around 1m each shielded twisted pair (the twisted pairs are not shielded). Currently I'm running RS485 through it, also 5V + separate ground to a RS485 terminated PCB on the...
Hi,
I have installed a 400w servo on a portal but after some time it seems like that the servo is losing the position due to noise it seems, it's just a few steps the result will be that the gantry will be off for like 0.5mm after 20 min operation.
When measuring with the oscilloscope I see...
I'm keeping it simple, I think I'll only have the 3.3V rail enabled when connecting the client, the 12V line might be activated once the 3.3v line has done some negotiation.
It's all low power, and there won't be a hugh inrush current at time when connecting the boards.
I'm still working on the...
the vendor just told me they can change the conducting part of the female connector so one pin will connect first (that's what they usually do for customers).
Great so I have the ground part covered.
So finally I'll use a buffer and resistor/clamping diodes.
You got me, the 74HCxx buffer which I was looking at is supposed to have a little bit better drive strength than the fpga.
Which protection would you suggest? Some resistor / ESD clamping combo?
I still wouldn't feel well to expose the fpga pins directly.
1668793339
thanks for reminding me...
That's why I have the buffer in between. The main board only exposes the pins of the buffer.
However the external controller directly attaches to the buffer. I will see how it goes, I need to build some software for the first HW setup anyway afterwards I can still fine tune certain HW parts
Hi,
I have developed some simple 8mm SMD Feeders, they're equipped with an ESP32 (the controller might change lateron, currently that seems to be the best available solution; and I'm not going to use wifi).
Now my plan is to have a fixed address for each feeder slot, the feeder bank will be...
I measured:
80V after 10 Seconds (going down from ~220V)
20V after 20 Seconds
(on the disconnected main plug)
The device did not come with a power cord, I'm just curious could this be a regulation loophole?
(again it's an industrial device, not meant to be disconnected or possibly equipped...
this is exactly what I was looking for thank you! The behaviour of the BLDC driver just made me curious about what is allowed and what not.
the power cord of that BLDC driver is probably not meant to be accessible -- thus I'm using it the wrong way (I have a CNC mill and CNC lathe, and I'm...
http://www.dt-me.com/products_details/98.html
everything's fine with the driver.
I expect I'm the problematic part here abusing the device with a 220V power transformer and a plug attached.
The device should not be detached and shorted like a consumer device (so I will change my setup here, to...
Sorry it's an off the shelf product, the issue is seen from a consumer point of view -- I can certainly open the BLDC driver and try to reverse engineer it however...
The question is are the power leads allowed to carry some voltage/power after disconnecting?
Is there any standard defined?
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