Hi,
I've just back tracked to your information regarding 1V per 1,000 revs Refugee and I can easily check this with a simple parameter P005 adjustment. I know the top speed of the motor to be over 10,000 rpm so if you are correct I should be able to double the current speed to 6,000 revs and obtain a much larger pot sweep? If this does work then perhaps there is another parameter to adjust to bring the full sweep within the 0-3,000 rpm? Its strange though that Huanyang specify the 10K pot without adding additional information? I'll remove the drive belt for high speed testing.
Your ABB VFD works with a 10K pot Peter so my Huanyang should also work with the 10K pot and I think something blindingly obvious is being missed? My VFD to motor cable is 1.5mm and has a proper woven screen. On page 12 of my manual it states ground both ends of the screen so this is what I'll do; I can ground the lathe end by connection to either the pedestal or the motor the other end grounded at the mains ground terminal on the VFD and I need to separate the power cables and signal cables because they run very closely side by side at the moment?
I'm not fully conversant with all this work Lawrence and perhaps I've misunderstood Refugee's instructions but I know I tried the two 5K pots in series the other day without any success; it really did test my patience and tire me out this afternoon and after playing with the VFD I washed the car; I felt perished as the last of the sun disappeared; it's getting much colder and under the bungalow wasn't like being on the beach either.
I've always said if there are 100 ways to do a job wrong I'll do these 100 ways first so I wonder what number I'm now up to?
When I get into the garage tomorrow I'll try Refugee's theory out first regarding the 1V and 1,000 revs as this is very easy; if no change then I need to spend time screening the motor cable making a good job of it; I might need to buy some proper metal glands unless I can simply connect the screening to the motor via the motor earth connection.
I'll also check that the motor is only earthed to the VFD Peter and not to the lathe. I'm usually very careful to earth the actual lathe as well for my own safety? I've been up since very early this morning spending a lot of time on this problem; I was also awake during last night thinking about it so I think I need to call it a day and spend some quality time with Bron watching a downloaded movie; as usual the normal TV is garbage.
Thanks Lawrence for the connection information; I'm working through all the suggestions.
Kind regards, Col.
I've just back tracked to your information regarding 1V per 1,000 revs Refugee and I can easily check this with a simple parameter P005 adjustment. I know the top speed of the motor to be over 10,000 rpm so if you are correct I should be able to double the current speed to 6,000 revs and obtain a much larger pot sweep? If this does work then perhaps there is another parameter to adjust to bring the full sweep within the 0-3,000 rpm? Its strange though that Huanyang specify the 10K pot without adding additional information? I'll remove the drive belt for high speed testing.
Your ABB VFD works with a 10K pot Peter so my Huanyang should also work with the 10K pot and I think something blindingly obvious is being missed? My VFD to motor cable is 1.5mm and has a proper woven screen. On page 12 of my manual it states ground both ends of the screen so this is what I'll do; I can ground the lathe end by connection to either the pedestal or the motor the other end grounded at the mains ground terminal on the VFD and I need to separate the power cables and signal cables because they run very closely side by side at the moment?
I'm not fully conversant with all this work Lawrence and perhaps I've misunderstood Refugee's instructions but I know I tried the two 5K pots in series the other day without any success; it really did test my patience and tire me out this afternoon and after playing with the VFD I washed the car; I felt perished as the last of the sun disappeared; it's getting much colder and under the bungalow wasn't like being on the beach either.
I've always said if there are 100 ways to do a job wrong I'll do these 100 ways first so I wonder what number I'm now up to?
When I get into the garage tomorrow I'll try Refugee's theory out first regarding the 1V and 1,000 revs as this is very easy; if no change then I need to spend time screening the motor cable making a good job of it; I might need to buy some proper metal glands unless I can simply connect the screening to the motor via the motor earth connection.
I'll also check that the motor is only earthed to the VFD Peter and not to the lathe. I'm usually very careful to earth the actual lathe as well for my own safety? I've been up since very early this morning spending a lot of time on this problem; I was also awake during last night thinking about it so I think I need to call it a day and spend some quality time with Bron watching a downloaded movie; as usual the normal TV is garbage.
Thanks Lawrence for the connection information; I'm working through all the suggestions.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
