With using the mdf board, you can put screws and clamps anywhere to hold the pieces down, and when you need to cut around a piece, you can put a screw through the piece to hold it. Since you will make a mistake once in awhile, this is what I recommend doing, and I have been doing this for many years. A piece of sacrificial mdf board can be screwed onto it. The T-slot, along the sides, have nuts inserted, and are used to screw a piece of 3/4" sub-floor onto: such as AdvanTech) After installing the sub-floor board. They will run and only be warm to the touch. Our controllers and steppers on all our units are now matched. And a stepper that is over rated for a controller will have less torque than one matched for a controller. In CNC's if the steppers are not matched with the controller the stepper or controller or both will run hot. From our experience most don't realize how they work.
That's why we use 25mm rail and carriages on all axes. Remember a CNC is like a chain it is only as strong as its weakest link. You can look here on eBay used rail& carriages that are 20 years old are being sold and are still in perfect shape. They are able to hold a much more precise cut and weight over rods and linear bearings. Rail and Carriages are 3 to 4 time more expensive than Rods and Linear bearings. This unit is ridged we only use grade 8 bolts its Ball Screws have bearings and a nut on both ends to relieve stress on the motors. There is 25 mm rail and carriages on each axis, and an oil flush connector on each axis.
Not forged pot metal and ground to fit then covered with tin. more milled from single sheet of 6061 aluminum. Special Pricing reg $4595.00 This is a 24"x 24" x 4" CNC. Ball Screws and 25mm Rail& Carriages on all axis.
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