2080 extrusions aren't very stiff. Torsion forces when the spindle is in the middle of the gantry will still cause chatter in harder materials. Put a dial indicator on the spindle shaft that's lowered all the way and push the stepper motor at the top, you'll immediately see what I mean. Add a steel square tube to the gantry back and side plates. That should stiffen it up sufficiently.
Thanks! Excellent advice. We are using thick wall extrusions and have some at 90 degrees for extra stiffness. But, we are still seeing the shaking, so we will try your suggestions!
It’s my own design, using many components from avidCNC.com. I used rails I found online (automation overstock??) and bought aluminum extrusion for the frame. It uses Avid electronics, which are excellent.
in order to avoid vibrations or such with z axe just install the two linear guideway rails away from each as most possible, that upper one raise it up in upper stream-slot in the aluminium profile.
Actually 45mm guide rails! They are WAY TOO BIG for the machine, and they have enough built-in resistance that the motors have to push quite hard just to overcome the bearing movement, and then on top of that, apply the cutting force. It also cuts back on the rapid speeds we can use. I had found them for sale on an overstock site and thought they'd be cool.
Yes. Crazy rails. It’s quite a load for the steppers to push around, even when not cutting. I’ll look into that bracing. Thanks for the helpful advice. I may send you some questions as I look into it.
Well done Rich can’t wait to see it really in action !
2080 extrusions aren't very stiff. Torsion forces when the spindle is in the middle of the gantry will still cause chatter in harder materials. Put a dial indicator on the spindle shaft that's lowered all the way and push the stepper motor at the top, you'll immediately see what I mean. Add a steel square tube to the gantry back and side plates. That should stiffen it up sufficiently.
Thanks! Excellent advice. We are using thick wall extrusions and have some at 90 degrees for extra stiffness. But, we are still seeing the shaking, so we will try your suggestions!
What cnc is that?
It’s my own design, using many components from avidCNC.com. I used rails I found online (automation overstock??) and bought aluminum extrusion for the frame. It uses Avid electronics, which are excellent.
My eyes are over here Rich 🤨
This is a great upgrade and has made a world of difference.
Enjoyed Rich!
ATB, Robin
in order to avoid vibrations or such with z axe just install the two linear guideway rails away from each as most possible, that upper one raise it up in upper stream-slot in the aluminium profile.
This is in progress. Also, reducing the rail size. Thanks for the nudge!
The bearing blocks are comical no need for that 4 20mm blocks would be better then 2 over sized ones. Very nice spindle upgrade!
Yes. It’s on my list to downsize to 25mm. The motors can hardly drive these things.
What’s the width of those guide rails? 35mm? Those bearing blocks are massive. Thanks for the video
Actually 45mm guide rails! They are WAY TOO BIG for the machine, and they have enough built-in resistance that the motors have to push quite hard just to overcome the bearing movement, and then on top of that, apply the cutting force. It also cuts back on the rapid speeds we can use. I had found them for sale on an overstock site and thought they'd be cool.
thats some massive rails even our thermwood series 45 use smaller rails! brace your gantry extrusion together in the back for more stiffness
Yes. Crazy rails. It’s quite a load for the steppers to push around, even when not cutting. I’ll look into that bracing. Thanks for the helpful advice. I may send you some questions as I look into it.
love the tripped the breaker remix at the end
Hi Rich,could you please tell me the exact dimensions of your new Spindle please?Cheers from Toronto Canada!!
www.avidcnc.com/dl/cad.pdf/MOTM%20QN-1F%206.518%2024%20ER32DX%20BT%20220380V%2029L0596100F%20performance.pdf
It’s this spindle: www.avidcnc.com/87-hp-plug-and-play-spindle-vfd-system-p-834.html?osCsid=4a0rqug9tckk5c40oi5mdl1e91
Thank you so much!!
Nice job bro !!!
Nice upgrades