Lead screw upgrade

[adamfilip]

I will update my stl files and post for all to enjoy

[misquamacus]

That all looks great, good job! I'm looking forward to your results.

[adamfilip]

I wired up so two endstops are connected to the same plug into the rambo
but now neither seem to trigger it.. I dont understand why..
they should each operate independantly.. they are not in series

[adamfilip]

ok, i figured it out.. looks like th Microswitches are on when not pressed and off when pressed. so I rewired them in series, and all is right in the world

[adamfilip]

Stepper steps changes from 4000 to 2560 in Marlin with the M8 Lead screws are 1.25mm per rotation, vs .8mm per rotation
im thinking of getting a 5:1 or 4:1 geared stepper

do you guys think it will make any difference
i would turn off microstepping in marlin this way

[sniffle]

Stepper steps changes from 4000 to 2560 in Marlin with the M8 Lead screws are 1.25mm per rotation, vs .8mm per rotation
im thinking of getting a 5:1 or 4:1 geared stepper

do you guys think it will make any difference
i would turn off microstepping in marlin this way

you would also have more torque to handle the weight of the X carriage and it would take a lot of the strain off of your motors... you might still use microstepping, but only 1/4 as a 4:1 ratio using 1/4 microstepping would technically give you 1/16 microstepping... but i don't know how marlin would handle that unless there were an option somewhere to set that you are using a geared stepper... that's a subject that needs further review... but it's a thought either way

[adamfilip]

I have updated my files and posted them here

http://www.thingiverse.com/thing:704091

[adamfilip]

I think you would simply adjust the steps.. and change the microstepping
no other adjustment should be necessary

[adamfilip]

would it matter if i went with a geared nema 23 vs a 17
im not concerned about the torque. I just want it to be super accurate

http://www.omc-stepperonline.com/gea...pg4-p-145.html

[sniffle]

i thought about that after i posted that just now got back to actually say something :-P

higher gear ratios are more important for accuracy, but torque is also important to be able to move the carriage... a nema 23 would just add even more torque