Re: Retrofit 2.0 TREE J325
Posted: Mon May 10, 2021 11:28 pm
Parts from DMM were ordered today. They were able to put a 20% discount in place with free shipping, and the parts should be here by the end of the week. I am working on panel layouts and will have the existing panels out for placing items for the bench testing - the previous parts have been removed from the control panel. Does it make much difference in the order of prep - control before power? I see the power side to be a bit more involved. The plan is to have all the power supplies in the power cabinet, including line reactor, E-Stop contactor and some breakers. Currently there are fuses in between the power entry and VFD, and I plan to keep them. Speaking of VFD I was able to change parameters on the Unidrive 2203 and now have full torque at low rpms - I had been able to stop the spindle with my hand before.
I am working on a block diagram for the power and control cabinets. I plan to use Acorn/DMMs schematic for the control side. There are many thing I have questions about but one area I have not considered is delayed starts. I am also unsure of what to shut down on E-stop - do I shut off the main power to the VFD - ? I am running 3ph from an RPC, I will probably use a transformer to get 110 to run the power supplies and take L1 and L2 to the control cabinet should I have a contactor to shut of the single phase power or should I just shut down individual drives?
I have tried to get the machine running using the existing Baldor servo motors, while I waited for the DMMs, it was going well until I fried my power supply. Now those 3 motors, with new encoders, will be available - these are the stock 31 in-lb motors from the Tree all the same number, which can't be found on the world wide web - let me know if there is interest.
EDIT Add Control cab block diagram - This is my first rodeo ...
I am working on a block diagram for the power and control cabinets. I plan to use Acorn/DMMs schematic for the control side. There are many thing I have questions about but one area I have not considered is delayed starts. I am also unsure of what to shut down on E-stop - do I shut off the main power to the VFD - ? I am running 3ph from an RPC, I will probably use a transformer to get 110 to run the power supplies and take L1 and L2 to the control cabinet should I have a contactor to shut of the single phase power or should I just shut down individual drives?
I have tried to get the machine running using the existing Baldor servo motors, while I waited for the DMMs, it was going well until I fried my power supply. Now those 3 motors, with new encoders, will be available - these are the stock 31 in-lb motors from the Tree all the same number, which can't be found on the world wide web - let me know if there is interest.
EDIT Add Control cab block diagram - This is my first rodeo ...