Starting to design out my build, looking for critique

[AndyUK]

Well... I have been inactive for a while now, I guess... But a certain event that might entail additional customs charges for the parts that I want to source from Britain, is pressuring me back into activity :D

You've got till the end of Jan - I'll give you good odds on that :)

Now I did not do nothing all this time, but I did get a plan going for the power lines. As mentioned before, I have someone with more experience than me in the field help me with the selection of specific parts, so the plan is just for the power connections, not the data lines. These are to be specified when the parts are fixed (Also, logic level stuff is more my expertise, so I can more easily deal with all of that on my own, while I am more concerned about getting all the higher-voltage lines done to spec).

Looks good - Although read the VFD manual about switching it on and off with a relay - mine specifically says not to. I'm hoping UCCNC will drop the spindle enable when it receives an E-Stop command, but have yet to test this.

I'm also planning to use FA/FB/FC for a fault signal feedback from the VFD to the UC300eth - I figure I'd rather use this function for stopping the CNC when the spindle faults (and therefore stops rotating) than running the water pump - which can just be run continuously anyway. I don't like the idea of the spindle stopping and then the CNC trying to force the bit through stock.... that sounds like a bad situation.

I also already got a hold of a couple parts: The person helping me has access to some old parts that are not used anymore, so I already have a 24V PSU, all the connector blocks and wiring that I could ever need, as well as a transformer and the fuses.

Cool. Also look for an electronics cab which will help you start placing components etc. I used Tempa Pano - rather cheap, but not perfect quality.

What I am looking to get in a more time sensitive manner, is the UC300eth controller, as well as the steppers mentioned in the above post and the AM882 drivers to run them. The drivers and controller have already been discussed in this thread, but it is the motors I am still a bit unsure about. They were chosen under the constraints that were brought up, but I might have overlooked something.

Don't forget to look into breakout boards. I really like my UB1. May as well buy them at the same time. Why is the UC300 time-sensitive? Usually its best to get the mechanicals in order and built before starting to buy the big ticket electrical components - you never know whats just round the corner in terms of new models, and you'll end up ticking away your warranty while you're still building.

On a different note of mechanics: I am pretty much ready, at this point to start buying parts, like the alu, the plates and the rails. I actually already have one of the rails here. And since there does not seem to be anything to change in the design, I will probably proceed with that, as soon as the electrical part is signed off on by the council of more knowledged people here :) And I guess, once I start buying, it is finally time to open a build log thread.

Looking forward to it! :)