Enable circuit

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tblough
Posts: 1259
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Re: Enable circuit

Post by tblough »

Yes, you do. The induced currents when the field in the coil collapses can cause arcing and welding of relay contacts. You need snubbers on ANY coil that is turned on and off.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
martyscncgarage
Posts: 7131
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Enable circuit

Post by martyscncgarage »

occustoms wrote: Fri Jan 01, 2021 2:42 am
martyscncgarage wrote: Wed Dec 30, 2020 12:33 pm
occustoms wrote: Mon Dec 28, 2020 2:53 pm Yes i have the 8bank like those and also bought an 8 bank of 30a hd ones.
Well for 4 axis you only need four relays.
The point being is that you feed the input into the board and you can use whatever you need on the output side.


Marty
Yes i understand. i bought extra incase i needed them.

Question tho If im using a relay on centroid to trigger another relay, that is powering a motor do i still have to have a snubber? i would think not but im not sure.
I would put snubbers on all coils...cheap insurance.
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