I see that the store is offering nuts and trust bearings to be able to tension the lead screws. I wonder about if my screws need to be longer to do this? Would like to know more about this method.

 

Thanks good idea.

 

Is the washer necessary for this kind of bearing?

 

Did putting these in tension do away with the wiping issue at 1500 mm?

 

I see! Would the 688 bearing still be necessary to keep the lead screw centered within the plate's hole? I don't think so, at least on the motor side of things, because the short distance from the plate to the motor would keep it within the opening in the plate.

So far, anyway, I have it installed like in this photos. Still haven't flipped the plates, hence my confussion about keeping or ditching the 688 bearings and/or the real need for washers. Probably once I flip the plates the thrust bearings would be recessed inside the plate...

 

Sorry for multiple postings.... I think this illustration is more clear, and make the case of what I think it should be done. Can someone validate or correct please?

 

Why wouldn't the bearing go in the end cap and the spacer between the bearing and couple?

 

In order to put the lead screw in tension don't I need to have the nuts on both ends. Or is there not room on the stepper motor end?

 

To put it into context, when applying compression to a leadscrew we use one turn of an M5 screw to apply the force - 0.8mm of movement (the workbee from Ooznest used to use compression by loosening the screws holding the end plates by one turn, tightening the lock collars and then re-tightening the end plate screws)
Alex.

 

Thanks that clarifies things.

 

could I buy some of these from you?

 

Has anyone extended the Y axis on their 1010? Is it possible to extend and keep the screw driven or would I need to change to linear rails?

 

Hi Open Builds,

I have a full version of Enroute, can I G code to my 1000x1500mm lead machine? I have just installed open builds power supply and black box and is ready to do tests on Y&X, My spindle is not fitted so would just like to send some file as dry run at this stage.

 

I see in the parts store that you can get a 1540mm acme screw that is 8mm in diameter. I wouldn't have to change any other parts since the one I have now is 8mm and 1040mm in length.

How is the whip with a lead screw of that length? Would this Tension Nut solve any whipping issues?

 

Everything I have is set up for 8mm lead screws so if I could stay with that size it would be much more cost and labor effective. So I might try extending and add the tension nut and see what happens. I'm hoping someone on here might be able to verify that the tension nut will help with the whipping on a 1500mm lead screw.

 

Does the mm-1000 spindle by stepcraft work on a lead cnc? It is a 1000 watt spindle. Seems to not be loud and only weighs 4 lbs (or something close). It seems like a good spindle option but I don’t know if it would work with an open builds system. Anyone have any knowledge on this?

MM-1000 DI Digital Milling Spindle for D-Series and M-Series

 

Hey guys! Started to build my lead 100x100 cm machine. Getting to the end of the build but Ive encountered this issue today. The gantries moving on the Y axis doesnt seem to hit the end at the same time.

The gantry on the left c-beam could still go 5mm till hitting the corner brackets, while the right gantry hits it already, while the machine has an opposite issue when going to the back, the left gantry hits the end of the c-beam while the right one could still go those 5mm.

I started to think there might be issues with the machine not being square, but Ive checked that with a 50cm square and both the base, and the C-beams seem to be square with each other. Measured all the beams for any errors with cutting but they also seem to be perfectly even.
Any idea what could be the reason for this? Is it actually an issue or it will disappear when I mount the Y-axis lead screws?

 

Hi Peter. Can you reference your 1500mm/8mm + tension set up so I ensure I order the correct parts? Is there a document referencing the correct set up somewhere on here? Thanks so much!