Rods "Spaceship" Scratch built Plasma Cutter build

What are the blue spade connectors on the back of the drives for? Earthing?

thefabricator03 wrote: What are the blue spade connectors on the back of the drives for? Earthing?

Yeh, originally, I used 5 pin connectors for the stepper cabling so I could pass the shield through on one pin and then I folded the shield back and added a male spade connector right at the stepper motors. Then they go up to an earth point just out of frame at the top right.

As it turned out, it was the right thing to do becasue the LAM's have a connector for the shield. Its a bit messy where the connectors are because I added piggy back spade connectors so I could terminate the shield on the driver and the enclosure. I'll try and remember to take a pic tomorow.

Actually, this shot I took today shows the detail reasonably well



The open frame driver is a LS1073a which is functionally equivalent to the DS1073a, the smaller 3 amp version of the 6 amp DS1076a I'm using on the DIN rail. The open frame one is a bit cheaper and what was available in Australia. I prefer the enclosed version.

Please tell me those are not daisy chained ground wires, please please pleaseeeeee.

tommylight wrote: Please tell me those are not daisy chained ground wires, please please pleaseeeeee.

Nah, they are in a star to a common ground.

I've been looking at the LAM boost function and its a bit different to what I thought. the manual says:

The BOOST input allows to manually reduce the current even while motor is rotating. This feature can be useful to reduce the heating when the whole torque supplied by the motor is not required (for example when the load moves at constant speed).

So that is an interesting scenario. They actually suggest you reduce the current when you get to cut speed. That will be easy to do.

Yeah, but that will bring the motor closer to stalling, by a lot.