Gantry style CNC mill

[giladv]

hello everyone, just a small update:

[RobC]

Can't wait to see some more shots as you build it!

[driftspin]

hello everyone, just a small update:

Giladv,


I am curious about your progress.

Any news?


Grtz Bert

Verstuurd vanaf mijn SM-A320FL met Tapatalk

[giladv]

hey driftspin,

unfortunately i'm kinda stuck as my friends CNC shop is busy with some real work haha (crying inside).
i have all of the "off the shelf parts" waiting in my home for the machined parts for almost a year now i think.

i promise to update as soon as things start moving again:)

Gilad

[Boyan Silyavski]

A question pops to my mind. Looking at the type of structure. WHY BT30 head?

I understand if you will tapp all day. But if not:

-you limit your speed more than half
-3kw spindle will cut through directly 1mm of mild steel with no problem and HSM with 6mm flute in that same mild steel any depth to 6mm!!! I know that from my machine
-forget about wood
-forget about engraving
- even aluminum needs 12k RPM at least with normal 6mm flute and 24k with 1/8 and similar

IMHO you limit severely your machine with this BT30 spindle. Its like driving a big black 4x4 near the seaside on a perfect road, while you must be driving a white cabrio sports car...


To me tapping could be solved differently and money spend towards better spindle, bigger spindle. At the end of the day it would be cheaper to make a dedicated servo+Z2+collet just for tapping.

Because from the looks that's not a machine for steel for me and i can not be easily convinced that it will be with that aluminum profiles.

Just some thoughts

PS. If you insist on this shape, size capability, then you need Epoxy Granite one, not a router, but mill. Ah, yeah. And extra spindle for small bits and engraving...

[JAZZCNC]

A question pops to my mind. Looking at the type of structure. WHY BT30 head?

IMHO you limit severely your machine with this BT30 spindle. Its like driving a big black 4x4 near the seaside on a perfect road, while you must be driving a white cabrio sports car...

Don't talk stupid. I'd rather have BT 30 spindle with option of ATC than 3Kw ER spindle anyday of the week. However what it really needs are high rpm rated bearings which can be replaced if needed.

Because from the looks that's not a machine for steel for me and i can not be easily convinced that it will be with that aluminum profiles.

Why do you doubt Profile.? Your machine is made from mild steel tube which very similiar in density to Aluminium profile but it's it's hollow so much more resonant which is bad news if trying to cut hard materials like steel.

Can tell you know I'd much rather have Gantry made from HD profile than from thin/medium wall Mild steel box section. Unless that box section was minimum of 10mm thick wall which then opens up all lot of other issues regards Mass etc.

Just because it's made from steel doesn't always make it better or stronger.

[Boyan Silyavski]

Don't talk stupid. I'd rather have BT 30 spindle with option of ATC than 3Kw ER spindle anyday of the week. However what it really needs are high rpm rated bearings which can be replaced if needed.

I'd rather not. I'd rather have a proper ATC spindle. A proper 7-15kw spindle. That BT30 spindle is limited to at most 10k RPM at the cost of rather expensive bearings.

If he needs a mill, a proper mill with BT spindle will be better, as DIY setup will not hold real tighter tolerance like a proper mill.

You know it, i know it. Thats why you have a router and a second hand proper mill. Ha, who are you trying to convince...

[JAZZCNC]

You know it, i know it. Thats why you have a router and a second hand proper mill. Ha, who are you trying to convince...

That wasn't the question thou was it and I'm not trying to convince anyone of anything except that your talking bollocks when say 3Kw ER collet based spindle with minimum usable speed of 5000rpm is better than Servo driven BT30 Spindle.!! . . . . Lets see your 3kw spindle do bit of rigged tapping or fly cut with 150mm head..