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Thread: More VSD/VFD problems.
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27th November 2011, 08:31 PM #46
I got a short length of cable from in town the other day, got it all hooked up, ran OK.
I ran the autotuning again today, The current gets slightly higher than before I ran it, but only at high Hz settings. Once the lathe has run for a bit and warmed up, the amps range from 3 amps through most of the range, to 4.5 amps at 95 -100 Hz. While its cold, running at 95 - 100 Hz it can get up to 7 amps. If it becomes a problem I will set it to 95 Hz maximum.
With the belt on the middle pulleys I get a spindle speed range of about 30 rpm to 1200 rpm, I envisage being able to do most, if not all of my work on this ratio. I will see if it has enough torque through the full speed range once I get a bit more progressed. Maybe will have to change down to slower ratios for the big stuff.
I put some stainless bar ( its what was the first thing I found, so it got used ) in the chuck and took a few fairly light cuts, the current wasnt increasing at all while doing this. Things are looking good
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