Please help🙏Upgraded to 1.5kw 220v spindle and having disconnect issues 😭

[Uriah (Uriah Liggett)]

Unfortunately, it looks like I spoke too soon. I separated the frame and aluminum heatsink with kapton, used nylons screws, and verified there was no electrical connection between the two, but I’m still seeing disconnects. One interesting thing I noticed is that the spindle body has 0 ohms resistance to the chiller, which is on the other circuit . It’s grounded through the coolant itself because I can read connectivity even when the chiller is unplugged.

[quicky06 (Ryan Quick)]

That makes sense as the coolant is conductive (water).

I found this on amazon. Not sure if it’s worth a try or not. I do not get any disconnects with the computer(tablet or laptop) un plugged. But this limits me to 3.5-4 hours of cutting at a time and business is picking up.

[agentwusabi (Kwwoodworks)]

I am still not at a point of being able to test my spindle since I have to have my machine running and its driving me crazy! lol
Soon though… I am getting everything soldered up, wires ran, etc to get ready to throw everything I can at this to get it going!

[The_real_janderson (Jonathan Anderson)]

Actually, that is strange. Distilled water is non-conductive and the ethylene/propylene glycol in the antifreeze may allow some electrons through but it shouldn’t be 0 Ohms. Even conductive saltwater still is a poor conductor compared to metal and would probably register in the hundreds of Ohms.

[LiamN (Liam Newcombe)]

Yep,

@The_real_janderson

Actually, that is strange. Distilled water is non-conductive and the ethylene/propylene glycol in the antifreeze may allow some electrons through but it shouldn’t be 0 Ohms. Even conductive saltwater still is a poor conductor compared to metal and would probably register in the hundreds of Ohms.

Agree with that, I suspect that the 0 Ohms is that mains earth is all the same earth in the house wiring and both the chiller chassis and the spindle are earthed.

[AndyC (Andy Corteen)]

Is the house earth actually/properly connected to earth? One way to verify this, but be careful as significant voltage differences can arise, it to bang a spike (6" or longer) into the dirt outside your workshop and measure the voltage difference between workshop earth and the earth ‘spike’. If you are seeing more than 10vAC difference, it suggests that there is something amiss with your house earthing… either that or you have excessively long cables from the house to your workshop and perhaps consider using a ‘local earth’ - something a competent electrician should be able to do

[Uriah (Uriah Liggett)]

My multimeter may be misbehaving. In the video you can see it oscillating from 0 resistance to infinite resistance while connected to the spindle and chiller, with the chiller unplugged from the wall. At the end of the video I disconnect it from the spindle and it reads infinite resistance.