Problem Child scale hydro

[RandyatBBY]

Looking great Mick. Running a CNC must be fun!

[mickieb49]

Thanks Wayne,
Randy it certainly makes things a lot easier mate, I can be sure everything is true and straight , then it is also easier than hand shaping ( even though I stil enjoy that part too), and when it comes to scaling it up or down, that's quite simple.
Machining the sponsons today, so stay tuned.
Cheers Mick

[Shooter]

Very nice. What end mills did you use? Did you run a rough cut first, and then a finish cut with a ball mill?

[mickieb49]

r/h sponson machined, now will put the steps on them.

shooter i use ball nose bits for all, better at plunge cuts too..

[Shooter]

Looks good. 1/2" or 1/4" ball end mill???

[mickieb49]

5/8" for the roughing, 1/4" for the finish.

[drwayne]

Waiting for the tub to arrive ... so I can start fitting in the needed go fast equipment.
Sponsons a month later would be fine.
( hint hint ) LOL

[mickieb49]

Working as fast as I can Wayne, not easy working full time, having 2 small kids under 4, a wife with 2 businesses....... LOL. Aint life fun!

I am about to put skim coat of bog over the plugs, then got to wait for it to dry then it's sanding time.....
Regards Mick

[drwayne]

[Shooter]

Mickie, sorry for all the questions, but I'm going to try to cut a cowl on the shopbot this weekend. I have my finishing tool path setup for 10% step over. Do you think that is too small? I'm also planning to run 2 in/s feed at 12k rpm with a 1/4" ball mill. MDF material. Any direction would be helpful. Thanks.

[mickieb49]

Shooter,
The questions are fine mate. depends on the required finish mate, but i have about a 0.125" stepover on a 0.25" bit, find i still need a little bit of hand sanding but mu chachine also isnt running for like 2 days straight.... With the feed rate, i run 110" /min feed rate, at 18000rpm, much faster and you will start breaking the bits. I bought some longer series bits from alibaba, they are 6" long for a 1/4, and 350mm (14") with a 5/8" but those are only for foam. Hope that answers your question

[mickieb49]

Just a little project update- This project is now in the hands of DRwayne.
Im sure it is in good hands, and hope he will update this thread as it all happens.

[drwayne]

Waiting for courier with the boxes !

[srislash]

[Shooter]

Shooter,
The questions are fine mate. depends on the required finish mate, but i have about a 0.125" stepover on a 0.25" bit, find i still need a little bit of hand sanding but mu chachine also isnt running for like 2 days straight.... With the feed rate, i run 110" /min feed rate, at 18000rpm, much faster and you will start breaking the bits. I bought some longer series bits from alibaba, they are 6" long for a 1/4, and 350mm (14") with a 5/8" but those are only for foam. Hope that answers your question

Thank you. This helps out a lot. Only thing missing is the depth of cut per pass? How deep do you cut?

Pete