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#31
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Depth of cut
I haven't finished my first machine, but I would really like to build a deep cut design. I wonder what needs to be changed to handle rigidity issues. The mechmate really is a well design machine. I began to form this opinion when I pieced together the z-axis tray. All the parts fit and interlocked forming a base for the z-axis. Well, I can't wait to get out there tomorrow and finish another task. One last thought on the Mechmate. It is a total sweat equity project. I now see why fellow builders have pride of ownership and I really appreciate their advise.
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#32
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When you say "deep" and "rigidity" you bring up the question of how precise do you want to cut?
The machine is very rigid, but when cutting deep, your cutter, z-axis and other things are able to show vibration or "lack of tolerance" due to runout, bearing-to-z axis engagement and a bunch of other things that to most in the CNC wood and foam routing machines are "precise" enough. I personally was able to get fantastic results with the 48" stroke z by just making a new spider with 2 more bearings at the top to keep the extended moment flex down. How deep are you trying to go? Is it further than the extended stroke version of the machine? |
#33
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River Deep Mountain High (Tina Turner)
Doesn't sound like I will have much problem. Adding the additional bearings is definitely a good idea. Making a longer z-axis won't be hard and adding the bearings is easy. All I have to do is find my spider. That thing has crawled into a corner and is hiding from me.
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#34
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Sean, are you using a total of 6 bearings or 8?
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#35
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Deep Cut for 6 foot box
I know it is a little creepy but I wanted to make a couple coffins for Halloween. I watched a youtube video where a guy made custom coffins for people. fyi... where is the cheapest place to buy a coffin and have it delivered to your house, Walmart online.
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#36
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Tom,
on the 48" slide I am using 8 on a custom, rebuilt spider. On the standard and extended slide 6 like the normal http://www.mechmate.com/forums/showt...&postcount=470 This picture on the link is missing the bottom 2 that were not installed at the time during my retractable spring set up. Last edited by smreish; Fri 25 October 2013 at 13:32.. |
#37
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One down 3 to go
Well after all my groaning and moaning I went out this afternoon and started grinding the x axis. It didn't take that long. It took more time to keep changing the disks. I ran out of disks and decided to leave the mosquitoes to them selves. I headed to Harbor freight for more disk. Tomorrow morning I will finish cutting and start drilling holes to mount the rail. I will warn any of you that will be doing this. Wear gloves and be careful of very sharp edges.
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#38
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Skate Free
Well the mosquitoes let me finish cutting all the rails. I was able to run a 7 inch flapper disk over them a get a coat of paint on them. Hopefully tomorrow I will be able to drill and mount them.
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