Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

**Snapper** · 24-01-2018

Originally Posted by JOGARA

What model of those extrusion channel nuts do I need for this X6-2200L?

I can't remember, I had a new solid bed made for mine, I think they were 8mm. Get m6 or even m5 if you like. KJN sell them, but they charge an arm and a leg for delivery if you're not nearby.

**JOGARA** · 24-01-2018

Ordered that vice and a new plate for leveling it.

Just saw this on FaceBook. No idea why I haven't seen this idea posted around before. Would have saved hours.
Will be testing it with this new vice.

Wait. Could have just printed a holder for the part and mounted it onto the base of the cnc machine....
Well at least the new vice will be a good paper weight...

Originally Posted by Snapper

I can't remember, I had a new solid bed made for mine, I think they were 8mm. Get m6 or even m5 if you like. KJN sell them, but they charge an arm and a leg for delivery if you're not nearby.

Thanks.
I have emailed them to see if they can confirm what size.
The gap at the top is 8.5mm and the OD of the threads is 7mm.
Can't pull them out atm as the machine is running.

**m_c** · 24-01-2018

You do realise those MarkForged jaws aren't plastic?
MarkForged produce carbon fiber and metal 3D printers.

I never seen the Gerardi vice offer :-/
I'll give Cutwel a call once I'm feeling a bit more flush, as I could really do with behaving for a couple months to let finances recover from last years expenses.

**JOGARA** · 24-01-2018

Originally Posted by m_c

You do realise those MarkForged jaws aren't plastic?
MarkForged produce carbon fiber and metal 3D printers.

I never seen the Gerardi vice offer :-/
I'll give Cutwel a call once I'm feeling a bit more flush, as I could really do with behaving for a couple months to let finances recover from last years expenses.

I print PLA 'Carbon fiber' xD

I don't actually mean to use them, just test fit before making aluminium ones..
But even so, would be fine if it was a large block that you sit the part in for chamfer operation?

**m_c** · 24-01-2018

I would think so for chamfering.

I'm not sure I'd trust them for anything involving much higher cutting forces though, but there is only way to find out..

**JOGARA** · 25-01-2018

Originally Posted by m_c

I would think so for chamfering.

I'm not sure I'd trust them for anything involving much higher cutting forces though, but there is only way to find out..

Might give it a go. Would make a nice little YouTube video.

**JOGARA** · 25-01-2018

Bit of Googlering and a few people are saying that it is M8 that one wants.

Yea shipping on KJN.

RS does some extrusion stuff though, these look about right?
https://uk.rs-online.com/web/p/conne...nents/3900379/

**Snapper** · 25-01-2018

Originally Posted by JOGARA

Bit of Googlering and a few people are saying that it is M8 that one wants.

Yea shipping on KJN.

RS does some extrusion stuff though, these look about right?
https://uk.rs-online.com/web/p/conne...nents/3900379/

You don't want m8. You will constantly be fighting to get the bolts through the slots and threaded in the nuts and there is absolutely no need for that much clamping force. M4 or m5 will be just as good, I used m6 because I have a tonne of m6 fixings in all sizes which is important. If you use rs the ones linked or these are the ones you want but not in m8.

https://uk.rs-online.com/mobile/p/co...nents/3900256/

You also don't want to be thinking about using anything 3D printed if accuracy and repeatability is what you're after.

**Snapper** · 26-01-2018

Just a thought here which I should have thought of sooner. You are aware of the sheer weight of a proper machine vice? I don't think the flimsy hollow extruded aluminium table that comes on the OMIO will give you much improved results. The bed will dip and probably bounce around like a trampoline. Think about that and try some tests before you actually use the vice and can no longer return it.

**JOGARA** · 26-01-2018

Originally Posted by Snapper

Just a thought here which I should have thought of sooner. You are aware of the sheer weight of a proper machine vice? I don't think the flimsy hollow extruded aluminium table that comes on the OMIO will give you much improved results. The bed will dip and probably bounce around like a trampoline. Think about that and try some tests before you actually use the vice and can no longer return it.

Had that thought to. Trying to have it close to the vertical frame.
Should have just bought a Tormach...