840 Table - Stiffening and Leveling

Hal Eccles · 2015-08-25T11:16:29Z

After owning my 840 for a few months and been pretty amazed what it will do, I ventured into cutting longer parts and then realised I had a problem with the flatness of the table. This can be seen with this image where you can clearly see the difference in cut hight (about 1.5mm from one end to the other). I also felt that there was a bit of flex in the table which I guess is not helping with the torsional stiffness of the machine. So to help with this I made a support support frame to fit inside the chassis of the machine (12mm MDF). If you would like the Vcarve files (can I export as dxf?) let me know - you'll have add your own stop cable holes! These were cut on the Steppi (see photo 1) but with all that care I still forgot to put holes in for the emergency stop cable :blush: ! This has made the table much more solid, and to that I added jvalencia's elastic solution to control the cable conduit. This job would have been much quicker on a table saw but not as much fun. The table is improved but I still have a problem with what I think must be twist, I've attached a DTI to the Z axis and will do some proper tests today. I'm building a heavy duty spoil board (about 30mm) with T Slots which I will level with a cutter once made, visit Peter Passuello's Youtube pagefor stacks of useful info. The next stage will be to build a solid base for the machine to sit on. Without doubt my rush to build and use the Steppi probably didn't help in the accuracy of the build and now after playing making a lot of things, it's time to set the machine up properly, which actually is a lot of fun. By definition a CNC router is a precision machine and considering it's a kit, the Steppi is really quite amazing, but for me it has been vital I bought the machine though a UK based supplier with years of CNC knowledge and not just a company selling boxes. I really think without the support I have received from Stoney CNC I would have not got this far. Oh remember, cutters are sharp :pinch:

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Assembly and Maintenance

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Doug

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Dear sanjaykviswas,

I wrote a guide to level the Z axis on this thread:

https://www.stepcraft-systems.com/en/forum/assembly-and-maintenance/3367-spindle-bed-tramming-840-supports#42414

Stepcraft 2/840, StoneyCNC industrial HF spindle, 4th axis, TurboCAD 2016 Professional 64 bit, MeshCAM, GWizard feeds & speeds calculator, UCCNC
Hobby use: guitar building (luthiery), https://dsgb.net

Veröffentlicht : 31/01/2019 4:11 a.m.

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