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Author Topic: controller box questions MACH4 ESS/MB3 Servos CPM-SDSK-3421S and first cut video  (Read 150 times)

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Offline Darko

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Hi everybody,

I am making progress on my DIY CNC, I have everything hooked up and it seems to be running well. I have actually made my first cut in three-quarter plywood. My feeds and speeds are off but nevertheless, I didn't break anything.

Now I wanted to finish building my electronics cabinet and make everything somewhat organized, but I am struggling with finding the right components to finish everything. I am not familiar with the terminology that those who have experience know about.

If you look at the attached picture you will see where I'm at currently so here are my questions:

I live in the USA, I will be running 220 electrics to the box. What kind of the main switch should I put on here? I see some people use Rotary switches like this one.


I bought one of these, but I think I bought the wrong thing because the switch end up being a transfer switch not ON/OFF switch

Should I have any kind of fuses where the main power is coming into the box?

Should there be a fuse between the power supply and servomotors in case the power supply dies wouldn't want anything happening to those servomotors?

What about the VFD I read on forums that I should have a power line filter like this one.


Any other suggestion anybody might have would be greatly appreciated.

Machine video here

First cut here.

Thank you


« Last Edit: January 16, 2021, 08:17:23 PM by Darko »
Hello !

The rotary switch that you have there sholud be ok. If you look on wiring diagram it is ON/OFF switch. Did you connect it corretly? You should connect input wires to L-L2-L3 and output to T1-T2-T3.

You should use 3-pole automatic fuses after that main switch. Before and after power supply also you should use glass fuse with correct current rating. I can help you with the values and schematic, but you need to tell me which power supply you use.

Input filter is suggested for any VFD, but it is not necessary. Depends on how "messy" is power network and how good the VFD is. They often come with EMC filter inside.
Where are you from ? Because I can se name "Darko" which is often in Croatia where I live  ;)

Offline Darko

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Hi Tomas!

Thanks for your reply.

Yes, I am originally from Croatia and I live in North Carolina, USA.
Are you also building a CNC machine or you already have one? Electronics is not my thing so this has been a struggle for me but I think I'm getting closer. Made a little more progress on the control box. It looks a little neater. Got the right rotary switch this time. I'm waiting on the VFD filter now.

I actually connected, wired the spindle and VFD today. I used the instructions and settings that came with the spindle. Do you by any chance know what settings I possibly need to adjust to not have any problems down the road. This is what I have now. My spindle is 2.2kw 220v water-cooled.

PD000=0        ( for Parameter unlock ( 1 ) for Parameter Lock)
PD001=0        (1 For Remote Control)
PD002=1        ( 1 For 0-10v Terminal Control or Remote Trim Pot Control )( J1 Also Needs to be set for Terminal Control )
PD004=400    (base frequency)
PD005=400    (max operating frequency)
PD008=220    (Motor Rated Voltage, If you have 120v spindle then set to 120v )
PD011= 0      (120)   ( 100 Minimum Setting with Quality VFD, 120 is Safe)
PD013= 08     ( is for Factory reset, Only use this to set VFD to Factory Default Settings)
PD014=10      ( Adjust to suit)
PD015=10      (Deceleration=12 (Adjust to suit)( PD15 is ignored IF PD26=1 Then the Spindle will Coast to a Stop)
PD070=1        ( This may need to be set to 1 if Control Voltage is 0-5v )
PD072=400    (high analog frequency)
PD073=0        (120)    ( 100 Minimum Setting ) 
PD141=220    ( Motor Rated Voltage ) (120 for VFD Rated for 120v )
PD142= 9       ( 220vSet for your motor Amp Rating 2.2Kw Spindle 9 amp
PD143=4        ( Motor Number of Poles)
PD144=3000 (Max Motor RPM) =3,000= (24,000)

 The last thing, Do you know how to wire the VFD to MB3/ESS board? It would be nice to control the spindle with the MACH4!
Right now I got it controlled with a knob on the front of the VFD


Where in Croatia do you live? I am originally from Zagreb.