CNC Grounding Best Practices Course

[@vytrox]

Thank you very much for all the incredible succinct information. I am one of the lazy people that were happy to get their DIY CNC going and only later realized that there were serious oversights regarding EMI and tons of basic stuff that I should have looked into about four years ago. Your series on incorrectly built controllers forces me to tackle a complete overhaul of my wiring, component placement and even shop layout to some extent. Great to hear that your audio got better, keep it up and thanks again!

[@corvetteguy50]

Thank you sir for your support, and I'm glad to have helped! Vince

[@bruhnowayy]

Commenting to get more suggestions like these gems

[@corvetteguy50]

Thank you for your support. Please just search my channel for a topic, and I have almost 500 videos on all topics for CNC electronics. Thank you, Vince

[@bruhnowayy]

@@corvetteguy50 I love you bro, I just subbed. I am going to binge watch all your 500 videos...

[@corvetteguy50]

Thank you for your support, and kind words. I really appreciate it! Vince

[@jonassantos4763]

I have a full metal machine, with ballscrew and linear guides, everthing is conectes but the resistance is almost 20ohms, i should conect a ground wire in the axis?

[@corvetteguy50]

Thank you for your support. You'll need to connect ground leads around all 4 corners of the chassis, along with both sides of the gantry using the proper ground strap to reduce the resistance. This is a tedious process, but is required to produce a stable robot. I offer ground straps in my store, along with a ground buss if you require them. Thank you, Vince

[@wurz2142]

Yes you should use ground all jour moving axis, because it protects also powered cable breakage,(phase to frame short circuit) that can ruin jour linear bearings or ballscrew instantly because current draw trought ball bearings. What that video dont cover is that ball bearings stops conducting moment the machine startis to move, because there are very small grease film and your frame not conducting any more. Sorry for my english I am a mechatronic from small country from europe and english is not my First language!

[@IceCreams62]

Very informative video..thanks a lot Vince 👍👍🙌 I have a doubt about the grounding of the Spindle/VFD. If the carcass of the spindle is electrically connected to the CNC chassis and the CNC chassis is connected to the ground bus, i need in any case to connect the spindle connector cable using also the fourth pin (U V W and E) of the connector on top of the spindle to the ground bus or if i do that i create a ground loop? Hope my poor English is clear enough to understand what i'm asking 🙂

[@corvetteguy50]

No, it will not as the ground for all connections will be the same in that they're all using your shop's ground. Make sure to only connect one end of the cable's power plug to the shield drain. In best practice it's to be connected to the VFD end. Thank you, Vicne

[@IceCreams62]

Thanks for the clarification Vince😊

[@dd_Dedsec]

@@corvetteguy50 Some people say that the the shield wire for vfd to spindle should be connected at 2 ends unlike other like motors, limit switches

[@corvetteguy50]

This is the latest trend certain vendors, and people in the forums want you to believe. The truth is shielding drains have been terminated the same way forever which is on one end only to prevent a possible ground loop regardless of the shielded cables applications. If you ask these people their reasoning on this, they'll answer by saying something similar to "that's the old way we used to do it" Which is correct it's the old way because it worked then, and still works now to properly ground the shield drain. Then same people then try to present the reason for doing this as a vendor of the VFD, or a spindle is saying to do it this way as its more effective for grounding the shield, or it could damage the VFD, or spindle. Now I suggest you use Google to see how many VFD's have been damaged from using the method of terminating only one end of the shield drain from EMI, and you'll soon find there aren't any search results for people having damaged units from this which means either its once again misinformation as much of what's online, or its been generated to make you purchase these vendors special termination kits, they just so happened to come out with. Need more proof based on practical examples? I've sold well over 3000 spindle cables in my eBay store that's verifiable as eBay tracks all my sales. My clients only ground their spindle's shield drain on one end. They never have trouble with EMI, or damaged units. Either I'm the luckiest engineer in the world, or I just proved my point. Here's my store's link www.ebay.com/itm/133891673596 Search spindle cables to go through my listings sales. research, Thank you, Vince

[@TouChA0]

could you see the installation of ground rod and give us your opinion under this name Grounding System Design and Installation -7 Steps #groundingsystem thanks

[@Leomgrb]

I’m working on a system 6040. Currently making ground drains and a properly grounded classy The copper pipes in my house have a ground rod into the earth at the water shutoff. Would it be worth connecting a wire to the rod from the distribution block? Shutoff is maybe 4ft from the machine location. I guess it’s mainly dependent on resistance in my homes breaker panel from the machines power in? Hope this makes sense, Thankyou for all the great information!

[@corvetteguy50]

Yes, if as you typed the resistance provides a rating of 3 Ohms, or under. If it doesn't you'll want to add more ground leads until it does. Thank you, Vince

[@gadget01]

Vince, helpful material here as always. Please check audio levels when editing- they jump several dBs from one clip to another. 2nd clip's level is very low, had to turn volume way up, then got blasted when the 3rd clip started. Just trying to help.

[@corvetteguy50]

Thank you for your support. I'll watch for it in future videos. Thank you, Vince

[@dd_Dedsec]

There are a couples of questions i need help for vince, 1. For sheilded wires does the 4th wire (ground for sheilded wire) does it needs to be connected to only one end at the ground bus? or also needed to be connected at the component side ground (eg for motor sheilded wire, one end going to the ground bus and other end connected to body of the stepper motor which is also grounded) 2. Which components' sheild wire needs to be connected at one end (People say for VFD it needs to be connected at both ends, but for motors, limit switches only one end) 3. if the wire is connected to both ends of the terminal, that complete terminal is connected to each other via machine chassey, so connecting it both sides or single sides simimlar in this case, or they still act as different potential points? 4. Why does VFD sheild wires needs to be connected at both ends (one at ground bus coming from vfd end, and other at machine chassis at other end) 5. Does the length of the wire matters if it is non-sheilded. 6. Should we use emi line filters for vfd inputs. 7. Also do we need to use ferrite chokes along with sheild wires, or not? if so how it should be done. 8. Can we keep the VFD inside same box if all components use sheild wires, and everything is well grounded.

[@TheStoryist]

Really? 8 questions, and how much do you intend on paying him to help him build your system? I suggest you offer him a payment for his time as you would expect yourself if you were him.

[@corvetteguy50]

Thank you for your support. Please contact me to set up a consultation. Thank you, Vince

[@dd_Dedsec]

how to properly sheild everything, I mean does motors, Spindles - VFD path and limit switches need to be used with Sheilded wires?. How to properly sheild everything, Does a common point on metallic chassey needs to be made and which Sheilded ones need to be only connected from one side and vfd to be both sides, please answer this ❤

[@corvetteguy50]

The cables that require grounding are any that carry sensitive signals for control. This means motors, switches, and breakout boards. Your CNC chassis should be properly grounded as well as your spindle. Thank you, Vince

[@juliavallo5720]

what is your email to get a copy of the document manual please?

[@corvetteguy50]

Please contact me through the video description, and let me know what you require. Thank you, Vince