The ball screw is only supported on the one end (motor end). It is short enough where there is no whipping which would require a support on the other end.
did your treadmill motor need a speed controller or did it wire straight up to the factory wires or did you need extra stuff to get it working besides mounts an belt kit
Josh, I have not converted to a treadmill motor and belt drive yet. It is on my list to do though. I have a 2.75 hp to put on but have not tried it yet. It should hook up to current wiring without any trouble. But I haven't gotten that deep with it yet. I have moved and don't have a shop built yet... but its coming. along with the motor and belt conversion.
Hello bill its me again Regarding the bearings do they have to be tightened in the aluminium cavity and also in the ballscrew as conventional bearings? sorry I'm new on all this stuff and just trying to figure out how to machine all the parts Regards David
Yes the bearings are fastened to the aluminum pocket. Helt tight with cap screws on the x axis and sandwiched between two blocks on the y axis. The ball screw is then tightened down with a nut to hold tight on the inner race of the bearing. Then another nut added to lock with the first nut seen at 3:34.
I use Nema 34 hybrid closed loop steppers with 12Nm on my Optimum Bf16 it's the same class as a G0704 but didn't convert into ball screws... How much better are they is there a big difference or if you have accurate normal ones that were in the mill when you bought it would you say it's enough or would you say they are so much better you have to change them into ball screws..., 👍👍
How bad was your mill at climb milling? I bet you had little to no accuracy problems if you accounted for backlash in Mach3, but I'm thinking it didn't like heavy climb mill cuts
I chose to stick with grease. It was simpler and space was getting tight in spots. I have found that grease lasts for a very long time in these. - Bill
+Hidden Acres you can't go wrong either way , space is tight I find myself having to rework things to make the oil fittings work. Will you have access to them when assembled?
No, I'll have to periodically open things up to grease. Maybe at some point I'll tare it down and install lube lines. Its a bit more difficult now because I have it all in an enclosure. But I'm sure I'll tare it all down with in the next year or two. -- Bill
I'm liking these assembly videos, good stuff Sir
perfect job!!!!
Does the Y axis aft/column end of the ball screw supported or is the support only from the bearings and blocks where the stepper motor is attached?
The ball screw is only supported on the one end (motor end). It is short enough where there is no whipping which would require a support on the other end.
did your treadmill motor need a speed controller or did it wire straight up to the factory wires or did you need extra stuff to get it working besides mounts an belt kit
Josh, I have not converted to a treadmill motor and belt drive yet. It is on my list to do though. I have a 2.75 hp to put on but have not tried it yet. It should hook up to current wiring without any trouble. But I haven't gotten that deep with it yet. I have moved and don't have a shop built yet... but its coming. along with the motor and belt conversion.
Hello bill its me again
Regarding the bearings
do they have to be tightened in the aluminium cavity and also in the ballscrew as conventional bearings?
sorry I'm new on all this stuff and just trying to figure out how to machine all the parts
Regards
David
Yes the bearings are fastened to the aluminum pocket. Helt tight with cap screws on the x axis and sandwiched between two blocks on the y axis. The ball screw is then tightened down with a nut to hold tight on the inner race of the bearing. Then another nut added to lock with the first nut seen at 3:34.
@@thorneworks thanks for your answer, i finished my machine and is working great!
@@TheDsher Glad to hear that. have fun with it.
what grease did you use for the ball screws?
Red N Tacky #2. Its a general purpose grease.
I use Nema 34 hybrid closed loop steppers with 12Nm on my Optimum Bf16 it's the same class as a G0704 but didn't convert into ball screws... How much better are they is there a big difference or if you have accurate normal ones that were in the mill when you bought it would you say it's enough or would you say they are so much better you have to change them into ball screws..., 👍👍
I can't say for sure. I never ran it as a cnc with the original ACME thread. I jumped right to ball screws.
How bad was your mill at climb milling? I bet you had little to no accuracy problems if you accounted for backlash in Mach3, but I'm thinking it didn't like heavy climb mill cuts
Your not using the One shot oiler for the BallNuts?
I chose to stick with grease. It was simpler and space was getting tight in spots. I have found that grease lasts for a very long time in these. - Bill
+Hidden Acres you can't go wrong either way , space is tight I find myself having to rework things to make the oil fittings work. Will you have access to them when assembled?
No, I'll have to periodically open things up to grease. Maybe at some point I'll tare it down and install lube lines. Its a bit more difficult now because I have it all in an enclosure. But I'm sure I'll tare it all down with in the next year or two.
-- Bill
What's the backlash like with single nuts?
About .001 - .0015
what size tube did you use for the ball nuts?
I don't know. it came with the nut.
@@thorneworks ohh thanks for the fast response... do you know if a 5/8(16mm) copper pipe will work for that purpose?
@@zg9xUmvV Sorry. Don't know.
this convertional assembly su