On Tuesday 19 February 2019 04:20:28 Lester Caine wrote: > On 18/02/2019 22:07, John Dammeyer wrote: > > Then there is the Far East solutions like the one in this link. > > <https://www.alibaba.com/product-detail/Low-cost-New-Product-3Axis-4 > >Axis_60343603384.html?spm=a2700.7724857.normalList.37.3701292eTmjk5p> > > Just testing ... The problem I have with long links is that once > thunderbird sees a quote it adds it's own '>' at the start and other > clients do as well, so <> wrapper is simply a stupid choice. > > Re the actual controller ... just what IS the capability of the unit. > How does one connect to it and does it really come with an open end > multicore cable for the pendent? On one hand these do look attractive, > but much of the 'magic' in gcode is the facilities beyond the simple > motion stuff and some indication on what it does support would help? > The pictures at the top show two different products anyway. > > The brick wall I'm currently hitting with my 3D printer is that the > supplied controller does not support table levelling and hard wires > the two z axis motors to one driver. Being able to play with levelling > left to right other than yanking one leadscrew manually would be nice > and I think the MachineKit based controller will do that AND allow > setting up profiling the surface afterwards. Something that a > 'packaged' solution from China has no provision for unless you replace > the whole machine ...
This 6040 has no bed leveling facilities. 3 small nema 23 motors but capable of over 100 ipm rapids once given decent drivers. As shipped, it was set to cook the A motor as its the smallest length of the lot. Also very tight screws, backlash under a thou. Level to bed?, I haven't checked yet, and the bed is extruded stuff. I'll check that when the renishaw clone gets here. Thats something lcnc can attempt to correct with comp files, I'm doing it on the Sheldon to comp for bed wear. No reason it can't be done, but take any twist out with its adjustable feet first. I may not be impressed with it electrically, but mechanically it seems plenty solid enough for 3d carving alu. In fact, I have a 1' x 2' sheet of 1/2" alu, some of which will be used for a new apron on the Sheldon as I made that one out of scrap from an Ampex VR-1200 deck, filling holes etc, and I need to move the Z nut to the right as much as theres room to move it, as I'm crushing the left Z bellows when Z is at the backing plate faces, which in turn is lifting the carriage a thou or so up the v-way. In retrospect, I should have ordered a 50mm longer 1500mm Z screw, and moved its anchoring point to a built up on the left face of the headstock casting. But whats done is done, and its turning within a thou over the range it can hold between centers and grind now. Plenty good enough for the girls I go with. :) As for levelling the bed on this 6040, installing a full sized spoil board and shaving it flat is probably the best that could be done. Then how do you clamp stuff without access to the T slots? Doubtfull I'd ever waste that much plywood in one whack though. Shaving the bed itself flat would be a tool killer with all that anodizing to remove. My budget certainly doesn't include that. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
