开云体育

Bryan, On my cnc router I am using 350 oz/in motors and Pacific Scientific 6410 drivers. I am using 1/4 step (800 pules per rev) with a flexible coupler to a lead screw with 4 turns per inch. This

Perhaps I should have asked my question in a different manner. What I'm curious about is what ratios people are using. I'm using 1:1 and it gives me more resolution than I need and less torque than I

That is a clever way of doing it. It is a system test and measures both the driver and the motor. Any thoughts about separating the motor performance from the system? If we know number of steps and

Divide the number of steps per second by the number of step per revolution. That will give you the speed in revolutions per second. The multiple time 60 for RPM Dan

I machined a capstan that was a bit under 2.000 diameter . It was reduced by 1/2 the thickness of the heavy nylon cord. One end of the line is attached to a spring scale that is deadheaded (fixed) .

Yes, folks! I replied too soon, before I realized he was talking REALLY-fast rates, and not the 500 steps/sec. and lower I am used to. MY stoopid mistake! Please ignore!

Hi. Re the gentleman thinking of welding chain to angle iron for his plasma cutter, I seem to have vague recollections of industrial chain with flanges on one "face" so that it could be attached to a

Bryan Mumford wrote: Probably divide by 5 to get 200 steps/rev, which is the usual for fine resolution stepper motors. And, the inductance is the overriding constraint, so half stepping or

The easiest way to build a dyno is with a positive displacement water pump. The input shaft is supported by beaaring blocks while the pump body is allowed to rotate. Mount a lever arm on the pump

Use a long string, so that there is time to accelerate up to a fairly high speed. You know how fast you are turning from the step rate - and the motor eathier keeps up, or starts missing steps at

I know that serious people love servos, and I've seen screaming machines at Westec. But I wanted to do this all myself and I'm not eager to get into the complexity (and additional cost) necessitated

I was in grad school in mechanical engineering at The University of Tennessee, Knoxville, when a friend of mine finished his MS thesis on such a device. He designed, built, and tested it, and I

Since a stepper is a permenant magnet motor, you should be able to use one stepper as a dyno for another? I have seen electric motor dynos, but what do you measure, and how do you calibrate it?

Brian, You have such a nice machine, you should consider servo's instead of steppers. Much better for your machine, high speeds, low speeds, all ok. Bert

Dear List, Let me first say that I am in over my head and need advice. I am trying to put together a DRO to measure travel of my Bridgeport knee. The plan is to use a 2 axis DRO kit from Camtronics

I turned a drum 2" in diameter and mounted it on the shaft, then hung a weight on a string. That allowed measurement of both holding torque and 'lifting' torque over a reasonable range of

Sounds like what we need is a simple way to dyno a stepper. Most of us (I think) are using surplus stuff. Alot of my motors don't even have nameplates. It is unlikely that I would be able to

Hi All, I have run down the link below and spoken to a nice man on the phone regarding prices and resolution. The strip is sold at about ?200 per meter depending on resolution. This can go all the

I have some data on my stepper motors, and there is a small speed/torque graph. But it speaks of steps per second. This probably means conventional whole steps per second. How do I relate this to a