To stiffen the Z axis.

Discussion about the CNC Shark Pro Plus

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anglinnr
Posts: 1
Joined: Thu Dec 25, 2014 10:38 pm

Re: To stiffen the Z axis.

Post by anglinnr »

I have been fighting this problem for the past 2 years. I was getting ready to rebuild the entire carriage out of aluminum. You may have just saved me a great deal of work. I have also noticed that there is flex in the x axis rails. The top one in particular. I plan on putting an aluminum angle across the back side at that point.

FixitMike
Posts: 119
Joined: Sat Mar 26, 2011 1:16 pm
Location: Renton, WA

Re: To stiffen the Z axis.

Post by FixitMike »

The X and Y axis rails in the ProPlus are marginal. I calculated that the weight of the gantry, Z carriage, and router will cause a deflection of .027" in the center of the table. The result is that if you put a dial indicator in your chuck, a perfectly flat table will look like it is .027" high in the center (because the router drops that much). This thread has a log of good information about making the axes more rigid: http://www.cncsharktalk.com/viewtopic.php?f=9&t=1342

BillK
Posts: 885
Joined: Mon Apr 18, 2011 3:08 am

Re: To stiffen the Z axis.

Post by BillK »

yes, I got 0.0285" when I calculated the deflection many moons ago. http://www.cncsharktalk.com/viewtopic.p ... 0&start=10

This has not affected anything that I have ever machined, but I remain aware of the center spot and do most of my small work in the lower let hand corner.
BillK
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tonydude
Posts: 1581
Joined: Tue Aug 17, 2010 9:23 am
Location: Buffalo,NY

Re: To stiffen the Z axis.

Post by tonydude »

Take a look at this video on youtube https://www.youtube.com/watch?v=TSTThLM8s8o&t=430s how he has strenghten his shark.

Tony
Buffalo,NY

"What will matter is not what you bought but what you built; not what you got, but what you gave”

Aspire 11.015, photo vcarve, cnc mako shark extended bed with the new upgraded HD 5 gantry with Led pendent.

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