There has been a lot of discussion with regards to motors and controllers and this combination has come up a lot as an excellent choice.
https://www.omc-stepperonline....5-0...m-4-wires.html
https://www.omc-stepperonline....-fo...or-dm860t.html
Without going into the long discussions, the stepper motor has low inductance that results in higher torque at higher speeds, and can handle higher acceleration rates.
The controller is very affordable for its performance. You want to feed the controller at least 60 VDC for the motor above. The controller supports a max input of 110 VDC! And you can also feed it with 80VAC straight off of a transformer.
This combination of motor and controller can far out perform your current build, and can be pulled from your first build for the second and even third. Basically, until you are ready to upgrade to servos, this combination should serve you very well.
The reference to Dean was in response to another member with regards to their critique mentioning racking in the design having the linear bearing trucks close together on the sides.
I second the need for some strengthening ribs on the vertical sides, plus along the entire back of the gantry. Box that in top, bottom, plus a few vertical ribs to tie the top, bottom, and face together. Make the bottom brace wider than the top, perhaps 6-8", then the top just wide enough to support a drag chain. The side profile would be triangular in shape. The bottom rail on the gantry is going to have the most force applied to it while machining, the top, much less.
For your drag chain, it needs to be large enough for all of your cables to fit, and if you are using a spindle instead of a router or dremel, you need some separation between the spindle cable and your z axis stepper wires and especially your limit switches. Clean wiring goes a long way towards reducing troubleshooting wiring issues in the future.
I hope that this helps.
John Z
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