[bcomstock]

I finally replaced my original 110V 2.2kW spindle with a new 3kW 220V spindle. Both are water-cooled and typical Vevor Chinese spindles. I'm using a typical H100 VFD, and an Mk3 control board. There were no functional issues with the original spindle, just underpowered/lack of torque. With my new 220V spindle hooked up, I first start it up at 10% (2,400 rpm) and it runs fine, and I can increase speed and everything responds predictably. When I decrease speed from the controller there's no change in the spindle's actual speed. When I try to turn off the spindle from the controller, the spindle instantly increases its speed. I quickly hit the e-stop to prevent damage, and the spindle stops.
Reading other posts it sounds like this could be an EMI issue with the new spindle or with the 240V power that I'm now using compared to the 120V power and original spindle? Is there something else I should check, or is this likely the culprit? it appears that EMI filters should be placed between the shop power and the VFD? This seems counterintuitive to me (clearly electrical engineering is not my specialty) as to me it seems like I'd want something between the VFD and the spindle itself. Note that my original wire from the VFD to the spindle wasn't shielded, so could this be part of the problem? I've double-checked that the output from the Mk3 controller is correct, and that the ground wire to the spindle has continuity to the frame of the spindle. I'm not sure what else to check but thank you for any input you guys may have.

[mactec54]

I finally replaced my original 110V 2.2kW spindle with a new 3kW 220V spindle. Both are water-cooled and typical Vevor Chinese spindles. I'm using a typical H100 VFD, and an Mk3 control board. There were no functional issues with the original spindle, just underpowered/lack of torque. With my new 220V spindle hooked up, I first start it up at 10% (2,400 rpm) and it runs fine, and I can increase speed and everything responds predictably. When I decrease speed from the controller there's no change in the spindle's actual speed. When I try to turn off the spindle from the controller, the spindle instantly increases its speed. I quickly hit the e-stop to prevent damage, and the spindle stops.
Reading other posts it sounds like this could be an EMI issue with the new spindle or with the 240V power that I'm now using compared to the 120V power and original spindle? Is there something else I should check, or is this likely the culprit? it appears that EMI filters should be placed between the shop power and the VFD? This seems counterintuitive to me (clearly electrical engineering is not my specialty) as to me it seems like I'd want something between the VFD and the spindle itself. Note that my original wire from the VFD to the spindle wasn't shielded, so could this be part of the problem? I've double-checked that the output from the Mk3 controller is correct, and that the ground wire to the spindle has continuity to the frame of the spindle. I'm not sure what else to check but thank you for any input you guys may have.

It sounds like you have a Parameter and wiring problem.

Your spindle should never be able to start at that low RPM, 6000 RPM is the minimum speed for these spindles to be run at

Take some photos of the VFD Drives input power wiring and the wiring to the spindle, yes, they all should have a 4-wire shielded cable from the spindle to the VFD Drive even the 110v spindle you used before

You said you checked the Ground at the spindle, did you check the 4th pin in the spindle plug that it has Ground ? connection to the spindle body

[bcomstock]

Thanks Mactec. I soldered the wires to the standard aircraft connector for the spindle, and the wiring to the VFD is attached. I verified that the ground pin has continuity to the spindle body. As for the low speed, I never run it that low under any load, but for my first startup I picked a low speed just to check that it's running, and in the proper direction. But if this is still detrimental to the spindle then I can certainly not do this again. I'm looking at shielded cables and I see a ton of options for 18/4, but that seems light to me. My new spindle says max 10.5A, and if that's divided by 3 for the 3-phase power lines then in theory that's only 3.5A per line max, which should be fine for 18/4. I'll spend more for 16/4 if needed for better factor of safety so I don't catch my mill on fire, but it'll be faster to run with 18/4 that I can buy locally, so I appreciate your input on that as well. On the topic if current, if the motor is rated for 10.5A and it's 220V, wouldn't that 2.3kW, not 3.0 as advertised? Unless there's more to the calculation than that? Clearly, nobody would misrepresent their Chinese products on eBay ; )

Here are my setup parameters in the VFD. Sorry for the long list but I'd rather give the full list than leave something off because I didn't understand the significance of it.
F001: 1
F002: 1
F003: 400
F004: 400 (note that the manufacturer insists that the Reference Frequency should be 200 Hz but I haven't changed this to try it out yet)
F005: 400
F006: 1.0 (intermediate frequency shows as 2.5 by default; I read somewhere about setting this to 1 for my previous spindle, and I've seen this recommended as high as 260Hz. The whole V/F curve seems like it's a significant factor in how the spindle runs but I've found frustratingly little consistency in recommendations or background details for me to better understand the finer points on how this affects performance)
F007: 0.5
F008: 220
F009: 13
F010: 8
F011: 0 (I assume this is where I should enter a higher number to prevent the machine from running too slow, and I should look through the Planet CNC settings to see if I can set a lower limit to match)
F012: 1 (this one is shown as Reserve, so I have no idea what this does)
F013: 0
F014: 10 ( have the acceleration set pretty generously to give it an easy ramp up)
F015: 10
F016-F021: 5 (no particular reason these are set faster; probably all set to 5 at one point and I changed F014/F015 to slow the ramp up/down)
F022: 0 (reserve, no idea what this does)
F023: 0
F024: 1 (stop key is valid)
F025: 1
F026: 0 (I don't have a braking resistor in my circuit so I'm not sure if that's something I should consider adding)
F027: 0
F028: 0
F029: 0
F030: 0
F031: 30 (I'm not sure why this is higher than the 0-20% range listed in the manual)
F032: 5
F033: 150
F034: 0.5
F035: 5 (reserve)
F036: 10 (reserve)
F037: Err (reserve)
F038: Err (reserve)
F039: 4 (reserve)
F040: 0 (reserve)
F041: 5 (this seems to relate to EMI but I haven't changed it from what it came set at)
F042: 5
F043: 0
F044: 2 (I only run in forward so I have a jumper between the X1 terminal and ground)
F045: 1 (nothing wired to X2)
F046: 14 (nothing wired to X3)
F047: 22 (nothing wired to X4)
F048: 23 (nothing wired to X5)
F049: 24 (nothing wired to X6)
F050: 1 (nothing wired to Y1 output)
F051: 5 (nothing wired to Y2 output)
F053: 3 (I have these wired into my e-stop circuit)
F054: 0
F055: 100
F056: 0 (not sure what hopping frequency is/does)
F057: 10
F058: 10 (not sure if this is important but per the manual it seems like this should be a higher number than F057)
F059: 50 (this is higher than the range shown in the manual of 0.1~10Hz)
F060: 0
F061: 0
F062: 0.5
F063: 1
F064: 5
F065: 0
F066: 0
F067: 0 (NPN, with jumper J2 set accordingly)
F068: 20
F069: 10
F070: 1 (I'm using the 0-5V signal directly from the Planet CNC board, not through an externally powered I/O board)
F071: 20
F072: 100 (should this be 400 since the VFD goes up to 400 Hz?)
F073: 0.1
F074: 0
F075: 0
F076: 0
F077: 0
F078: 1
F079: 1
F080: 2
F081: 0
F082: 0
F083: 0
F084: 0
F085: 0
F086: 15
F087: 20
F088: 25
F089: 30
F090: 35
F091: 40
F092: 0.5
F093: 10
F094: 15
F095: 20
F096: 25
F097: 30
F098: 35
F099: 40
F100: 45
F101: 10
F102: 10
F103: 0
F104: 0
F105: 0
F106: 0
F107: 0
F108: 0
F109: 0
F110: 0
F111: 0
F112: 0
F113: 0
F114: 0
F115: 0
F116: 0
F117: 0
F118: 1
F119: 165 (do values in this section impact how easily a spindle of any given power will stall under heavy load?)
F120: 200
F121: 5
F122: 220
F123: 3 (my goal with this one is that if the spindle is being pushed too hard it'll detect it and shut down, though with my older spindle sometimes it would fault and shut down when it was only running a few amps. Maybe this was due to some random EMI as well and not necessarily related to this setting?)
F124: 0
F125: 1
F126: 0
F127: Err (reserve)
F128: 1 (reserve)
F129: 360 (reserve)
F130: 0 (I'm not using this for contant pressure pumps so I assume F131 - F139 have no impact. These are all at default values)
F140: 3.0
F141: 220
F142: 11
F143: 2
F144: 3000
F145: 5 (also, is this something that I can set to help with torque during machining?)
F146: 20 (when not under any load the spindle only draws about 2A, so is that what I should change this to?)
F147: 0.1
F148: 2
F149: 100
F150: 1
F151: 0
F152: 1
F153: 0
F154: 0.5
F155: 0
F156: 10 (per the manual default here is 100, though I didn't change this)
The rest of the parameters are items that are unchanged from how the VFD came in and generally seem to match the defaults in the manual.

Again, sorry for the huge list, but I'm trying to learn what all of these parameters do and I greatly appreciate any input you may have to help me learn and improve my setup. I'm going to post this and then I'll add my photo to the next one.

[bcomstock]

Photo of VFD wiring.

[mactec54]

Photo of VFD wiring.

Yes, your Parameters are not all correct and there is only a few that need to be set, so if you have messed with all of them then it will have to do a Reset to set them back to the Default I will look at what I have for your VFD Drive

The wiring I only see (1) Ground connection is that from the input Power or from the Spindle

Depending on the manufacture of the spindle the best spindles are G-Penny the 10.5A could be the power factor .77 gives you 10.5A that's how they arrive at that number a 3Kw should be close to 12A

[mactec54]

Thats not a common VFD Drive so I don't have a Parameter set done for it, I have the manual so will do a Parameter set for you

Don't use Parameters from other people or VFD Drive postings unless they have been carefully selected for your motor, it is easy to damage your spindle motor by using the wrong Parameter settings

Yes, running your spindle below the 6000 RPM minimum can damage your spindle or Drive, when running below the recommended speed the Amps go higher the motor overheats and the damage starts to happen

[bcomstock]

Yeah, it's frustrating that the manufacturers are either unable or unwilling to send recommended parameters. I get that there are lots of applications for their products but there's a ton of these Vevor or other similar brand spindles that use the same H100 platform VFD. The VFD's do have some variance for output power, but the manuals are all the same and they seem to function the same so I'm not sure why they don't give recommendations.

Regarding the grounding, I have the spindle and the VFD going back to a common ground terminal in a junction box, so it is grounded. My original spindle didn't have any instructions to wire a ground to the 4th pin so I just used 3 wires. For my new spindle I ran a separate ground wire, though that's temporary until my grounded 4 wire cable comes in. Looks like 18/4 is fine for a 10.5A spindle when split over the 3 wires?

Thanks again for all of your help. It makes a world of difference and I really appreciate your time.

[mactec54]

Yeah, it's frustrating that the manufacturers are either unable or unwilling to send recommended parameters. I get that there are lots of applications for their products but there's a ton of these Vevor or other similar brand spindles that use the same H100 platform VFD. The VFD's do have some variance for output power, but the manuals are all the same and they seem to function the same so I'm not sure why they don't give recommendations.

Regarding the grounding, I have the spindle and the VFD going back to a common ground terminal in a junction box, so it is grounded. My original spindle didn't have any instructions to wire a ground to the 4th pin so I just used 3 wires. For my new spindle I ran a separate ground wire, though that's temporary until my grounded 4 wire cable comes in. Looks like 18/4 is fine for a 10.5A spindle when split over the 3 wires?

Thanks again for all of your help. It makes a world of difference and I really appreciate your time.

Vevor is not a manufacture just a sales outlet I would not buy from this company, they just have name branded lots of different products

Most manufacturers of VFD Drives do not do or supply Parameter settings, normally a VFD Drive defaults to a standard Ac 50/60Hz motor and are almost ready to go, so when 400Hz and up to 1200Hz high speed Spindle motors hit the market there was nothing to run them that was cost affective, so the Higher frequency VFD Drives were developed, there were some but most people that needed a 400Hz drive could not afford the price of what was available

You mean 4 wire shielded cable this has to be a cable like this CF6-015-04 you can buy it by the foot when you open the PDF click on the part # I listed, and it will go to their web site, scroll down and enter or select your part # then you will see the specs and price per foot

18/4 is not suitable for your Spindle that would suit a 1.5Kw spindle

[RaderSidetrack]

Vevor is not a manufacture just a sales outlet I would not buy from this company, they just have name branded lots of different products

They have some similarities to Harbor Freight or Northern Tool, without the physical storefronts. But their product range is all over the board, as they seem to be selling everything that someone might buy. I came across this Vevor "gumball machine" being sold at the Lowes website:

https://www.lowes.com/pd/vevor-Vendi...ies/5014075979

[bcomstock]

New cable is ordered and on the way.

[bcomstock]

Yeah, the seller's "technical experts" said that I simply need to set up my VFD per the following chart. . .

[mactec54]

Yeah, the seller's "technical experts" said that I simply need to set up my VFD per the following chart. . .

Thats not of much help, does you VFD Have a Potentiometer on the KeyPad as this would be the best to run your spindle to start with, then do the remote connection once you know it runs correctly from the Keypad

The VFD Drive say it has Vector control, but I don't think it can function as it does not have Auto Tune which is normally required when you use Vector control mode

I have done a basic set of Parameters that you can use with this Spindle, first run with the KeyPad in V/F mode and then we will try the Vector Mode, once everything is working correct
then check the 0-10v output from the Breakout Board if this is working correct then you are ready to connect for Remote-control connection

In MDI Mode check M5= 0V at output to spindle speed control M3S12000 should give you 5v if not then this needs to be corrected before you connect to the VFD Drive

FWD control Relay this must be working also 0n / 0ff 0n with M3 0ff with M5

You may have to do a VFD Drive Reset before adding these Parameters

Parameter F013=8 will Reset the Drive Defaults then you can just rest with this Parameter list

Mactec54
H100 VFD Drive 3kw 220v Air Cooled

F000=0 (1 For Parameter Lock)

F001=0 (KeyPad Control)

F002=3 (Pot Frequency Control)

F003=400

F004=400

F005=400

F006=260

F007=20

F008=220

F009=143

F011=120

F012=0 (1=Vector Control)

F013=0 (8 Factory Reset)

F014=8 (Adjustable)

F015=8 (Adjustable)

F023=0

F027=20

F028=10 (Adjustable Be careful with this Parameter)

F041=8 (Carrier Frequency)

F140=3Kw

F141=220

F142=10.5

F143=02

F144=24000

[mactec54]

You can't do this; this is very dangerous and a Safety problem this can only be like this for a test run only, this 0n / 0ff must be controlled by M3 and M5 with a Relay

F044: 2 (I only run in forward, so I have a jumper between the X1 terminal and ground)

[bcomstock]

Thank you for your time to put this together for me. Your help is very much appreciated. I'll give this a go and let you know how it works out. Yes, my VFD has the potentiometer for local control so I'll do that first as you suggested. The only item that caught my attention is F144 set at 24k. The manual says this parameter is the speed at 50 Hz, which is why I currently have that set at 3,000, and my older spindle seemed to run correctly with this set at 3k as well. Early on when I ran this set at 24k as it came from the factory the spindle ramped up to an extremely high speed and I quickly hit the e-stop to avoid damage. Any thoughts on this are greatly appreciated as well.
Thanks again!

[mactec54]

Thank you for your time to put this together for me. Your help is very much appreciated. I'll give this a go and let you know how it works out. Yes, my VFD has the potentiometer for local control so I'll do that first as you suggested. The only item that caught my attention is F144 set at 24k. The manual says this parameter is the speed at 50 Hz, which is why I currently have that set at 3,000, and my older spindle seemed to run correctly with this set at 3k as well. Early on when I ran this set at 24k as it came from the factory the spindle ramped up to an extremely high speed and I quickly hit the e-stop to avoid damage. Any thoughts on this are greatly appreciated as well.
Thanks again!

You are miss interpreting what is being written the 50Hz is in reference to the 1440 which is the standard RPM for a 50Hz 3Ph Ac motor, you have a range of up to 60000 you must set this to the motor name plate of F144=24000

All VFD Drives are by Default from the manufacture are to suit a regular 50Hz / 60Hz 3Ph Ac motor

There is nothing in your VFD Drive that should have any reference to 50 / 60 Hz your Spindle is 400Hz

It went to a high RPM when you first started it because your control of the 0-10v Analog supply is not working correctly

When you start it from the KeyPad turn the Pot CCW to the lowest setting and it should start at the Minimum Speed setting of 7200RPM

[bcomstock]

Update. I'm still waiting for the new cable to be delivered, but I reset the drive and input the parameters per your recommendation. There were two that I was unable to set as high as you recommended:
F006 (Intermediate Frequency) was initially capped at 15Hz, but after going through the rest of the setup the cap was changed to 150Hz, which is quite a bit lower than the 260Hz as recommended. I believe this was initially set to 2.5Hz.
F009 (Intermediate Voltage) is capped at 40V max, so I was not able to set this at 143V. I believe this was initially set to 13.5.
Can you please confirm these parameters? I graphed some options out, and if F009 is limited to 40V it looks like I should be hitting that closer to 10Hz if it's to be roughly linear to 220V at 400Hz.

Questions on EMI. I'm hopeful that the new cable will solve my EMI issues but are there more things that I should do to make my system more reliable? In my early trials with this VFD and spindle with my old unshielded cable it seemed to throw off the Planet CNC software such that it disconnected from the computer, which seems like this could be from the greater amount of EMI that I'm getting with this larger 220V VFD and Spindle. When I exited and restarted the Planet CNC software interface everything seems fine, but obviously I don't want to keep doing this if it's going to cause damage. The other things I've seen recommended are:
1. Input power line filters between the power supply and the VFD. I assume this is to prevent noise from going back to the main breaker and then affecting other lines in the shop? My PC and other things in the shop are on a separate circuit, but they all go back to the main breaker.
2. Ferrite rings on the 3 phase output lines from the VFD to the spindle. One place I saw recommended 3 loops for each of the 3 wires (but not the ground) around a single ferrite ring.

These things don't seem to be widely recommended so Either they're overkill and my problems will go away with a proper cable, or they're standard practices that experienced guys just know to do every time.
I can also move my VFD to a separate box that's farther from my CNC board and servo drives. This might be a good practice regardless?
I'd very much like to find a good online course or maybe something at my local community college to learn more. I'll see what my local library has but let me know if you have any recommendations for educational material. My son and I joke that this is why companies spend so much on professional machines that are already developed, but as an engineer I love to get into new things like this to understand how things work. There's definitely a lot to take in. Thanks again for any advice on these items.

[mactec54]

Update. I'm still waiting for the new cable to be delivered, but I reset the drive and input the parameters per your recommendation. There were two that I was unable to set as high as you recommended:
F006 (Intermediate Frequency) was initially capped at 15Hz, but after going through the rest of the setup the cap was changed to 150Hz, which is quite a bit lower than the 260Hz as recommended. I believe this was initially set to 2.5Hz.
F009 (Intermediate Voltage) is capped at 40V max, so I was not able to set this at 143V. I believe this was initially set to 13.5.
Can you please confirm these parameters? I graphed some options out, and if F009 is limited to 40V it looks like I should be hitting that closer to 10Hz if it's to be roughly linear to 220V at 400Hz.

Questions on EMI. I'm hopeful that the new cable will solve my EMI issues but are there more things that I should do to make my system more reliable? In my early trials with this VFD and spindle with my old unshielded cable it seemed to throw off the Planet CNC software such that it disconnected from the computer, which seems like this could be from the greater amount of EMI that I'm getting with this larger 220V VFD and Spindle. When I exited and restarted the Planet CNC software interface everything seems fine, but obviously I don't want to keep doing this if it's going to cause damage. The other things I've seen recommended are:
1. Input power line filters between the power supply and the VFD. I assume this is to prevent noise from going back to the main breaker and then affecting other lines in the shop? My PC and other things in the shop are on a separate circuit, but they all go back to the main breaker.
2. Ferrite rings on the 3 phase output lines from the VFD to the spindle. One place I saw recommended 3 loops for each of the 3 wires (but not the ground) around a single ferrite ring.

These things don't seem to be widely recommended so Either they're overkill and my problems will go away with a proper cable, or they're standard practices that experienced guys just know to do every time.
I can also move my VFD to a separate box that's farther from my CNC board and servo drives. This might be a good practice regardless?
I'd very much like to find a good online course or maybe something at my local community college to learn more. I'll see what my local library has but let me know if you have any recommendations for educational material. My son and I joke that this is why companies spend so much on professional machines that are already developed, but as an engineer I love to get into new things like this to understand how things work. There's definitely a lot to take in. Thanks again for any advice on these items.

So, there is something not right with the VFD Drive if they can't be set F006 has a setting range up to 1000Hz there may be another Parameter that needs to be set to unlock it, the default settings are for a 50Hz / 60Hz operation, your settings are for 400Hz if these can't be set then the VFD Drive is not suitable for your spindle

F006 and F009 have to match this is voltage to Hz ratio setting, so can't be just set at any random number, I will look at another setup for F006 and F009

For EMI you can help your system by using a EMI Power Filter, this need to be mounted close to the VFD Drive Power Input, the best Filter for this is TDK Lambda RSN-2030L EMI Power Filter

No, you should not use or need Ferrite Rings on the output this can cause problems if not done and sized correctly

So, a quality EMI Power Filter and the Correct Termination of the Shields on the Spindle Cable is normally all that is needed.

Is the Planet Control USB you may need an USB isolator Plus USB shielded cable with Ferrites at each end, if it uses a USB connection

Your machine Cabinet can only be supplied with /from (1) Power source, so you should have a 4-wire 30A cable to your cabinet disconnect from there split to feed the drives Power supplies Etc, Power supplies can also have the own EMI input Power Filter also

Twist all Power wires dc in their pairs Ac also but not the Ground wire

Install a Ground Busbar, this is where all Grounds are connected, mount everything on a Metal Plate this is then the Ground Plane

Just (2) snips for Cabinet Grounding much more if you need it

[bcomstock]

Lots of great information, and my shopping list continues to grow! My VFD/spindle cable is due by tomorrow 9PM according to UPS tracking so we'll see how accurate that is.

Note that with the V/F curve Minimum and Intermediate values back to the default settings the spindle seems to operate normally when I did a very quick test run. I swapped out the USB cable from my PC to the Planet CNC control board for one with ferrites at both ends.but the software still lost connection with the board when the spindle turned on. This was just a random cable that I found that had these so no idea if it's as good as it needs to be, but at this point I'll see if this is still a problem after I install the proper VFD/spindle cable. The TDK Lamda filter will be here by Friday. I also fixed the X1 input to run through a relay from an output from the control board instead of the jumper. Lots of little things, but we'll see where we are after the new cable's installed.

Thanks again!

[mactec54]

Lots of great information, and my shopping list continues to grow! My VFD/spindle cable is due by tomorrow 9PM according to UPS tracking so we'll see how accurate that is.

Note that with the V/F curve Minimum and Intermediate values back to the default settings the spindle seems to operate normally when I did a very quick test run. I swapped out the USB cable from my PC to the Planet CNC control board for one with ferrites at both ends.but the software still lost connection with the board when the spindle turned on. This was just a random cable that I found that had these so no idea if it's as good as it needs to be, but at this point I'll see if this is still a problem after I install the proper VFD/spindle cable. The TDK Lamda filter will be here by Friday. I also fixed the X1 input to run through a relay from an output from the control board instead of the jumper. Lots of little things, but we'll see where we are after the new cable's installed.

Thanks again!

The only need for the F006 and F009 is to help the spindle have full torque in the middle frequency range (speed range), without those setting the spindle will lack full torque in the lower spindle speeds

Try these settings then see if you can change those Parameters both by the manual should have no problem with my settings

F176=1

F010-11

F012=1 see how it runs with this setting across the whole speed range

Cable installation is very important, because the spindle plug is not designed for shield clamping you have to get creative with the strain relief clamp to clamp the shield at that end the other end you will clamp the shield to the Ground Plane as per Snip

Are you using (1) Ac Power supply to your complete machine power needs???

It sounds like you need the USB isolator no matter what you do, so you should get one, they are not expensive

[bcomstock]

F176 was locked at 0, so it's expecting 50Hz The manual indicates this is fixed so hopefully this isn't significant to how it runs. I was able to set F010 and F012, but F006 and F009 still have the same max values (150Hz and 40V). Per the manual F006 Intermediate Frequency is limited by the Reference Frequency (P004) which we have set to 400Hz (this is what the seller insisted should be set to 200Hz). F009 Intermediate Voltage is limited by P008 Maximum Voltage, which is set at 220. I'm not sure what else is limiting these parameters. If these are my limitations it looks like 40V would be at roughly 60Hz if it's linear to 220V at 400Hz. Would the middle-frequency torque be improved if we set this 40V max intermediate voltage at a lower speed like 40Hz or 50Hz?

I agree with the USB isolator and have one on order.

I have a dedicated breaker feeding 240V from my main panel, and I have another 120V circuit feeding my PC, Servos, water pump, etc. I have my shop in my home with 200A service feeding the main panel, so I'll put the EMI filter near the VFD to prevent it from sending noise into the rest of the house. I'll look at putting an EMI filter on the line going into the servo drive power supply if that's another area that I should be improving. Your point is well taken regarding a single power line into my panel, and while I make every effort to make a decent setup, admittedly my panel isn't at the same level as what I used to see in equipment that my suppliers made for my various work projects.

I'll install the shielded cable tomorrow for the VFD to the spindle. I previously verified that the #4 pin on my spindle connector has continuity to the spindle frame, so I was planning to connect the ground wire on the new cable to the #4 pin at the spindle and to the ground back by the VFD. If I understand correctly from what you're saying and what I've read, the cable shield would only be connected to the ground in the panel and not to anything by the spindle to prevent a closed loop with the ground wire?

Thanks again!