My flying gantry machine

[progomez]

I have decided to make a smaller machine to test out the delrin nuts I bought off ebay. They are 10x2d and round. How do people mount round delrin so it doesnt spin? Should i flatten one end.

I have bought some trapezoidal rod from merchant dice size 400,400,200. Im thinking of encasing the machine in mdf and trying out a moving table design. The size should fit on my desk and the casing should stop some of the dust and noise(my main problem with my original router).

Ill only be able to make items less than 300x300 but will be good for testing. thanks for the advice.

[irving2008]

I have decided to make a smaller machine to test out the delrin nuts I bought off ebay. They are 10x2d and round. How do people mount round delrin so it doesnt spin? Should i flatten one end.

I have bought some trapezoidal rod from merchant dice size 400,400,200. Im thinking of encasing the machine in mdf and trying out a moving table design. The size should fit on my desk and the casing should stop some of the dust and noise(my main problem with my original router).

Ill only be able to make items less than 300x300 but will be good for testing. thanks for the advice.

I have the same nuts. I drilled out a chunk of mdf the diameter as the nut, slit it on one side, drilled through and used a couple of M5 bolts and M5 teenuts (captive recessed nut) to put the 'squeeze' on the delrin. 4 mounting holes in the corners allows ot to be bolted to the underside of the table/gantry/etc.

[progomez]

I have the same nuts. I drilled out a chunk of mdf the diameter as the nut, slit it on one side, drilled through and used a couple of M5 bolts and M5 teenuts (captive recessed nut) to put the 'squeeze' on the delrin. 4 mounting holes in the corners allows ot to be bolted to the underside of the table/gantry/etc.

Thanks for the reply.

Would it be worth me shaving one side flat? Does the mdf hold it solid? have you got a picture of it?

Also is a moving table design better for accuracy?

[irving2008]

Thanks for the reply.

Would it be worth me shaving one side flat? Does the mdf hold it solid? have you got a picture of it?

Also is a moving table design better for accuracy?

No need to shave it, it holds it fine, just roughen the mating surfaces. Can use some loctite if need be. My cutting forces are low.

Sorry no pics, I didnt take any but I might have the first trial one somewhere....

I dont think moving table v moving gantry is ab accuracy issue. Moving table (in X only on mine) is easier to implement in my view and with lightweight workpieces and low cutting forces (e.g. PCB milling) can get away with lower cost unsupported rails.