Stepper - ballscrew loading

[Jonathan]

Over the weekend i will be loading my gantry (in lbs) in the middle to measure the deflection and too see if it needs more work, so i needed a guide weight to go by.

I'd be wary of using the Z-axis to do that as unless you have something to measure the force, such as putting bathroom scales underneath the Z-axis, you could seriously damage something - 2262N is 508lb.f.

my 3nm nema23 on 70v (good guess there) may be replaced with a nema 34 but ive not decided which one yet.

How much does your Z-axis weigh, just the bit that moves up and down so we can work out the motor and driver? It'll be quite a lot with the spindle and motor you're planning on, but generally such high speed isn't required on the Z-axis anyway.

[Ricardoco]

I'd be wary of using the Z-axis to do that as unless you have something to measure the force, such as putting bathroom scales underneath the Z-axis, you could seriously damage something - 2262N is 508lb.f..

LOL thankyou for the warning but im not that heath... I have a motorcycle scissor lift with digital weight guage on it and that can go beyond 1.5 tone, so we should be ok there and i will be building my Z when i know what forces i will require it to achieve.

How much does your Z-axis weigh, just the bit that moves up and down so we can work out the motor and driver? It'll be quite a lot with the spindle and motor you're planning on, but generally such high speed isn't required on the Z-axis anyway.

Ahhh now there is a question..lol, I will not be able to answer that until i have my Spindle and Motor. So for now i am working on reducing any twist or flex on the gantry itself.

[Ricardoco]

LOL thankyou for the warning but im not that heath... I have a motorcycle scissor lift with digital weight guage on it and that can go beyond 1.5 tone, so we should be ok there and i will be building my Z when i know what forces i will require it to achieve.



Ahhh now there is a question..lol, I will not be able to answer that until i have my Spindle and Motor. So for now i am working on reducing any twist or flex on the gantry itself.

I am also considering belt drive 2:1 gearing so it wont be fast anyhow, but i need to test the gantry Re-inforce if need be test again and work out what stepper and driver i require so neither the stepper or the gantry is stressed beyond its capability.