I have a Hitachi VFD on my lathe. Despite the having no prior experience with VFD's, I had no troubleI do have to say the Fuji manual is rather cryptic about a lot of the settings
I have not dug into the Hitachi manual just yet, only got the machine Thursday.
Speaking of Mark (mksj), and here he is.I have the 940-TS and now the 1440-GT.
Also what is the "setup" you bought from Mark?
Thank you for your help.I do not recommend wiring the VFD directly to the spindle controls for safety reasons and you are also do not take into account the foot brake, E-Stop or any of the other safety features. I had previous outline a very simple conversion (basic) which uses the contactors to switch the VFD inputs and also maintains all the safety features of the lathe. Each 1440GT seems to have some variants on wiring, so you need to have a basic understanding of what your are doing in the conversion. With the foot brake, you should issue what is know as a free run command to the VFD which negates the VFD braking when using the foot brake. This requires replacing the brake switch form a single pole to a dual pole, one side trips the power realy (default) the other side issues a free run command to the VFD. Otherwise they will fight each other. Note, the VFD input run commands are completely separate from the machine low voltage circuit. The details of the conversion and programming have been outlined in the following thread:
You must use an external braking resistor with the VFD on a lathe, there is too much momentum otherwise. There have also been other postings with suggestions as to VFD cabinets, venting, switch gear and fusing. If you can't find it send me a PM with your email and I can send the files.
Thanks,I may go with your exact lathe when I retire in a few years. meanwhile, i'm improving my skills on the old South Bend.
I am very jealous!
Yes, I documented it in this thread.jbolt, is that a solid block (compound replacement) under your toolpost among the swarf? If so I'm mulling over a design for my lathe as we speak. Did you document this anywhere I can see what you did? I'm collecting thoughts & wisdom from a few other folks who have done this (Stefan.G, Rob.R David.B).