cnc crashes when cutting 2D profiles in wood

[chrisobrien07]

Folks,
thanks for the replies,
I have some redesign of the Machine to do I think....
.
Clamping:
Better clamps are needed I am thinking those Ive linked to below.
redesign of the bed is also needed ...I am thinking of installing Tracks link
below also.
this change combined with the use of double sided tape should help a lot.
.
Rigidity of existing machine:
Yesterday I went along each of the rollers on the X axis and adjusted the eccentric nuts on the rollers to tighten them, I did notice an improvement. I will complete this for the remaining rollers.
.
Linear slides:
To do this I need to redesign the machine... so this is a phase 2 change and I am not ready for that yet. Before I commit to linear slides, Id like to do some engineering analysis on designs to ensure the design is going to be good enough
.
0.5in spindle:
having a larger collet will help vibrations as far as the advice I've been given goes... the chinese spindles i have seen only have a 0.5in n a 2.5Kw spindle. this is whole lot bigger than the 700w router I am using... but it would also be heavier and would just add to problems with the current machine.
.
Bits:
I definitely need to cut up to 30mm depth 2d profiles through hardwoods. this is for guitars and necks... any advice on bits for such jobs would be appreciated.
.

Clamps:
https://www.amazon.co.uk/POWERTEC-71...gateway&sr=8-2
.
T-Tracks:
https://www.amazon.co.uk/POWERTEC-71...web_4030454031

[magicniner]

.
0.5in spindle:
having a larger collet will help vibrations as far as the advice I've been given goes... the chinese spindles i have seen only have a 0.5in n a 2.5Kw spindle. this is whole lot bigger than the 700w router I am using... but it would also be heavier and would just add to problems with the current machine.

The only thing a larger spindle can do for you is add mass, there is no magic in spindle capacity itself which can reduce vibration, only mass and rigidity will do that.
You can experiment with added mass with your existing spindle, there will be a sweet spot for each set of cutting conditions but more mass will always give some improvement as it's inertia will resist cutter deflection.

Looking at your video again your spindle mounting system could be massively improved by adding a second identical mounting ring and having the two as far apart as possible, your current mounting arrangement has almost no triangulation and will be a point of flex in the system.

[cropwell]

Have a look on t'interweb for 'toggle clamps'. Ebay sell shitloads from China. Also have a look at this kit from Chronos - Soba M6 Clamping Kit 36 pc (Ref: 120710).

I will have a look at your spindle mounting and get back to the thread. I have significantly bolstered up my spindle mounting, but it just shows everything else wobbles in my Dicey machine. Is there such a thing as engineering viagra? (Just to stiffen everything up).

OK back again : Your spindle mount has a couple of threaded holes doing nothing (is this the same on the other side?) You could probably put in some triangulation there to clamp to the Z axis plate.

Rob-T