Emcoturn 120 lathe retrofit

LutzTD wrote: For control cable I am using shielded cat6a or the cable that was on the component from the lathe.

Just be aware that ordinary Cat6a (and ordinary Cat5) might not resist oil and coolant very well. That concern is why I chose the PUR sheathed stuff, despite it being rather more expensive. But then the runs inside a machine tool are short compared to wiring a building.

bummer. So bigger isnt always better. I tried hooking up the contactor/estop today. Nogo. So I finally go and read the instructions, of course thats the last resort. The contactor needs 24VDC 200W to close when cold. Of course my awesome 24VDC PSU is only rated to 96W. My bad. I looked and found another smaller contactor that only draws 3.5W. Live and Learn. that cost me $35. Anybody need a 80A 4 pole contactor?

andypugh wrote:

LutzTD wrote: For control cable I am using shielded cat6a or the cable that was on the component from the lathe.

Just be aware that ordinary Cat6a (and ordinary Cat5) might not resist oil and coolant very well. That concern is why I chose the PUR sheathed stuff, despite it being rather more expensive. But then the runs inside a machine tool are short compared to wiring a building.

mostly the cat6a is from the Mesa to the drivers and to the Dell. I think the only run outside the control is for the encoder, albeit the dirtiest place on the lathe, it is behind a wall. I will see if I can come up with a jacket for it. The encoder has a military 7 pin connector on it maybe I can run it inside a silicon tube from that termination. Thanks for the heads up.

ran most of the power wires today. It looks a mess but I will jacket all of the loose runs that are there now. Removed the big contactor and stole the piece of din rail to mount the 3amp double pole breaker and the outlet which arrived yesterday this let me wire the 24vdc psu and the computer, which I also mounted using a short piece of 1x1 aluminum tube. I need to make a mount for the mesa board, and then figure out all of the control wires. I have a 240V plug coming but I will still need to wire an outlet in the garage for 4 wire and get an extension cord to go from the wall outlet to the lathe plug. Still lots to do. I also need to wait for the encoder plug and make that wire, along with a shaft adapter and modified mount.

LutzTD wrote: Can you give me some info on the ferrite beads?

I bought four of these and put them inline on the output according to the section on RF filtering in the Automation Direct manual for the VFD. I used an SO cord for my output to the motor so inline was easier than wrapping the individual wires.

www.digikey.com/product-detail/en/wurth-.../732-3092-ND/2626031

-Tom

Sunday I made a shaft adapter. since the difference is not enough to put in a set screw I just ended up splitting it to use the pulley set screw for both diameters. this doesn't have a lot of torque on it so it should be fine. The mounting bracket will have to be remade. Im looking for a decent shareware 2D cad package so I can do this at home, I can do it in Solidworks or Pro/E Creo at work but at home I'm limited to Cambam which I don't like very much as a drawing package.