Does anyone know the new Elite stepper motor torque rating(s) (x/y,&z)? All I can find on the onefinity site so far is that it is “more” than the X-50.
Thanks!
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And there it is! So much for my search skills! Thanks,
Bill
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I assume from your response that the MASSO 36V closed loop stepper is on all three axis… The MASSO motors have less torque than the X series based on the replacement part specs… particularly the X-50, X axis motor with 269oz.in. Just curious, whats the rational in going down in torque? My novice intuition always says “more is better”… especially if you are going through a significant re-work.
Thanks,
Bill
Masso does not list a 1.2 Nm motor on their site???
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PezWoodworks,
Your right. on their website, MESSO offers 2Nm (283oz-in) and 3Nm (425oz-in). Makes you wonder why MASSO is building a special downsized 1.2 Nm (170oz-in) version for onefinity.
I have been seriously considering the upcoming Elite upgrade, but I have a problem removing my 1.85Nm motor to replace it with a 1.2Nm. Maybe its no big deal and doesn’t matter…
Onefinity Support: Do we have the story straight, or are we missing something?
Thanks,
Bill
Hey Bill,
to compare torque values alone makes no sense. You got to take into account many other factors, on a stepper motor the step angle and also the way the driver drives the motor.
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Aiph5u,
Okay… I can buy that a smaller motor can outperform (or at least equal) a larger motor if it has a better control system… on the other hand… well… torque is torque and that is largely the metric that is compared (right?)… and a 35% reduction seems significant to me… BTW: if you have motor step angle info for the masso and current motor to compare and show an advantage to MASSO, please share.
I am curious if there is any published information to demonstrates that the smaller MASSO motor performs as good or better than the current (52% more torque) motor. Onefinity had to make the decision based on some performance data (probably).
Thanks,
Bill
Probably has to do with the ball screw lead, faster inches per minute at a lower motor speed could make the lower power motor outperform the higher one at higher motor speed, torque falls off rapidly at higher speeds
Just a thought.
Pat
Hey Pat,
It mainly has to do with the algorithms how a stepper motor is driven. There are so many tricks modern stepper drivers do and so many parameters to program. Comparing some holding torque between very different motors and drivers is of very little value considering how many other parameters determine the operation of the motor. E.g. when you switch from stepper motors to brushless servos, you replace a 2.4 Nm stepper with a 0.57 Nm servo motor, but it outperforms the stepper completely.
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The “more is better” concept in terms of torque might apply to an open loop stepper where if your CAM program drives the tool that cause forces beyond the available torque of the stepper motor causing lost steps but in a closed loop setup if there are lost steps for whatever reason it will correct. I wouldn’t get overly concerned on the comparison of the torque between the two systems.
WaywardWoodworker,
I see your point… and Aiph5u provides an interesting example of replacing a 2.4Nm stepper with a .57Nm servo… Great discussion.
thanks,
Bill
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Are you sure that servo Motors loose torque as they turn faster I vaguely remember reading that a big reason that servo motors are better than stepper motors because they don’t loose torque as they speed up.’
It seems they do loose torque too.
