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03-01-2021 #21
been using the mill fine using my external bench supply for the spindle, tempted to just ditch the lenze and buy a cheap pwm 60v controller and be done with it since my psu can only do 32v
is that a terrible idea
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03-01-2021 #22
Not the best.
I'm surprised that the motor is only rated at 60V... whoops... a quick google confirms someone else with a VMC190 with a 60V spindle... so let's go with that.
Using a standalone PSU you've only isolated the supply to the spindle - in other words isolated the spindle from the RCD. You[ve not fixed anything, just avoiding the protection normally offered. Did you get around to cleaning the spindle motor?, or testing the Lenze?
(full disclosure: I did pretty much what you're suggesting - replacing a spindle motor and controller card when it was cheaper than replacing the OEM controller card - so call me a hypocrite)
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03-01-2021 #23
i don't know if i mentioned it properly but it stopped popping the RCD and instead now just trips the breaker actually in the machine, i did take the motor out but its pretty much spotless and everything about it looks next to brand new
still not tested the lenze with a different load yet
just for reference if i did decide to do the same what motor did you end up replacing it with?
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03-01-2021 #24i don't know if i mentioned it properly but it stopped popping the RCD and instead now just trips the breaker actually in the machine.
just for reference if i did decide to do the same what motor did you end up replacing it with?
That's not necessarily a solution for all, but it got me the power/control I wanted into the cast-iron spindle-head enclosure on my SX2.7. Not particularly cheap (£261.11 all-in)... compared to a replacement BLDC controller card (£247.48... fragile as F.. and no easy speed control).
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03-01-2021 #25
gotcha, think i'll just look for another dc controller since whatever i try and do with the lenze the second it gets power it spins up the spindle and pops the breaker
might try get it working some day but the headache it seems to cause isn't worth the time right now
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03-01-2021 #26
Have a look at tread mills I bought one for £20 a few months ago fully working and local
It’s got a DC controller and dc motor. Meant to be 2hp but that will be Chinese 2hp if you get my drift
Paul
Sent from my iPhone using Tapatalk
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03-01-2021 #27
i'll keep that in mind for when i inevitably want a more powerful spindle
that said my little motor has been cutting steel fairly well most of the day
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03-01-2021 #28
I don’t find my vmc190 to be underpowered
It’s a small machine and as such you can’t expect it to take massive cuts
I’ve added flood cool to mine over Xmas and that makes a big difference
Cheers. Paul
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03-01-2021 #29
i think i got a decent deal with mine, came with the factory mist system, though i probably will upgrade to a flood at some point if heat becomes an issue
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03-01-2021 #30
I didn’t fancy breathing in the coolant fumes
Not a fan of mist coolant systems to be honest
Paul
Sent from my iPhone using Tapatalk
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