Add a couple more 2x4s to the Maslow frame (to provide more places to drill into). Make sure each beam you add is level and secured well. I also used a wood saw to trim off the protruding 2x4s which previously supported the stock. Next, attach each of the 6 pieces you cut, using a level to ensure they are even. Then slide the metal tracks into the grooves and screw them down.
Maslow Cnc Frame
My preferred approach is to clamp a bottom skirt on to the frame to support the stock. By choosing a piece of scrap that is the same thickness as the stock, the sled can travel over the skirt without tilting. After that, it takes only a few minutes to clamp on enough scrap to create a full skirt.
Hi there just waiting on delivery of my unit and was wondering if I should start with the standard frame and set up or go straight to upgrading the frame if so would you change anything about the support structure, more bracing , using steel etc , cheers Paul
Finally got my Unistrut frame built and made my first cut on it today. Works great, and no flexing. Used 1.5 inch PVC pipe to contain the extra chain at the top. And used a pully and weight system to keep the tension on each chain. Upped the power supply to 12v 30 amp, way more than this will ever need, and added a fan to the shield for the additional heat dissipation. Also added a router power control and setup z axis auto zero. Maslow CNC is awesome thanks to everyone who made this happen. Still need to update a few things on the frame, but I am very impressed with the results.15279923379561977487588.jpg22684032 2.84 MB15279915006331217060092.jpg40322268 2.09 MB15279925395591158242407.jpg22684032 1.98 MB
I just measured ours, which was based on the original frame, but then I added some extensions to make the motors 10" higher and 3" wider for better accuracy in the problem areas. Our dimensions: 81" tall x 126" wide x 25" deep. Hope this helps!
If I were to do it all over again, I would have built it with the upper unistrut higher from the start. The unistrut is uncut, so to go wider, one would need to extend it, but then it would be more resistant to changes in the distance between motors. Also note that this design uses a sheet of 3/4" plywood as part of the frame. Most modern designs have gone away from that, I think because flat stock is subject to flexing. Still, I regret nothing, because I have a working Maslow!
This frame is inherently strong and less susceptible to flexing than the wood frame when assembled, and has the added benefit of completely disassembling and reassembling without wear on major parts. This frame can be made to collapse/fold/partially disassemble much more easily than the default wood frame. (although we have no documented folding models just yet)
Note that UniStrut is more expensive than wood and screws, particularly in the attaching hardware. Those bits add up quite quickly too, with an expected full frame design costing somewhere in the range of $250 all told.
At some point (a theoretically calculated distance) from any maslow using spec chain weight and spec motor strengths, chain sag will increase with the amount of chain deployed to a place where accuracy suffers and cannot be easily compensated as the free motion available via sag is too high.
Assuming a stiff metal frame, I can increase length (acknowledging the diminishing returns of the calculated limits above) more easily than height (both for available room in my garage, and the aforementioned variables)
At some point (a theoretically calculated distance) from any maslow using specchain weight and spec motor strengths, chain sag will increase with the amountof chain deployed to a place where accuracy suffers and cannot be easilycompensated as the free motion available via sag is too high.
Assuming a stiff metal frame, I can increase length (acknowledging thediminishing returns of the calculated limits above) more easily than height(both for available room in my garage, and the aforementioned variables)
Note: rather than fixing a frame problem, you can use the Frame Settings (below) to make your machine size smaller than the standard 8 ft. x 4 ft. This will prevent the machine from attempting to access the inaccessible corners. However, after later making changes to the frame to clear the obstruction, the calibration process should be repeated.
A Maslow cnc system is a community-supported, open-source, computer controlled wood cutting router mounted on a frame controlled by three DC motors. It takes input from gcode generated from a number of different CAM software programs. It is built on a tilted frame to minimize the footprint and hangs with two of the motors controlling chain length for position control and one motor controlling the height of the router for depth of cut. Targeted at one full sheet of plywood or mdf as a cutting piece, Maslow can be sized up or down to fit the desired user cut area. Control software consists of two machines working in concert. 2ff7e9595c
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