Stepping Motor Required

[terry32506]

Hello , I am in need of a Stepping Motor part number 57BYGH803 which comes out of an IE 500 laser engraver. I live in Canada , anyone have any contacts as to who I could try in obtaining one of these motors?

Thanks very much,

Terry

[Kelinginc]

It will be similar to this motor
http://www.kelinginc.net/KL23H276-30-8A.pdf
http://www.kelinginc.net/NEMA23Motor.html

[terry32506]

Hi there thanks for the info and yes similar however not quite the same allthough one of these would probably work but a little risky to the mounting of it , I have the defective motor so really trying to duplicate it if possible.

Terry

[zax15uk]

Terry,

Google is your friend...

http://www.yeno-electronics.com/prod...?ProductID=571

http://www.jameco.com/webapp/wcs/sto...oductId=237631

Since it is a NEMA23 stepper motor you could replace it with any other NEMA23 with the same specs, the mounting would be the same as NEMA23 specified the size and mounting hole locations as well as other basic dimensions. The length will change depending on how many stacks, but so would the torque and other factors.

Zax.

[terry32506]

Originally Posted by zax15uk Terry, Google is your friend... http://www.yeno-electronics.com/prod...?ProductID=571 http://www.jameco.com/webapp/wcs/sto...oductId=237631 Since it is a NEMA23 stepper motor you could replace it with any other NEMA23 with the same specs, the mounting would be the same as NEMA23 specified the size and mounting hole locations as well as other basic dimensions. The length will change depending on how many stacks, but so would the torque and other factors. Zax.

Hi Zax I had a look at that site you gave me and there is not a listing for the 57BYGH803 motor but there is for the 303 and even though it looks pretty much the same not sure, so I was wonddering if that would be suitable? Im no expert on the electrical aspects on these motors as you can tell by now. I heard there is a way to prevent these motors from stepping too far...This motor I have is used to raise and lower the bed on my laser engraving machine.

[zax15uk]

Terry,

I'm not sure what you are looking at, the link should take you directly to the correct p/n (57BYGH803) for $29.30.

Steppers can be travel limited by mechanical (physical stops) or software (programmable limits) but not within the motor itself since it doesn't know where it is. Software has to 'home' the motor to a stop or electronic limit (opto or mechanical switch) prior to counting steps.

Zax.

[terry32506]

Originally Posted by zax15uk Terry, I'm not sure what you are looking at, the link should take you directly to the correct p/n (57BYGH803) for $29.30. Steppers can be travel limited by mechanical (physical stops) or software (programmable limits) but not within the motor itself since it doesn't know where it is. Software has to 'home' the motor to a stop or electronic limit (opto or mechanical switch) prior to counting steps. Zax.

Yes and thanks Zax , I have emailed them to find out the cost to ship it.

[terry32506]

Originally Posted by zax15uk Terry, I'm not sure what you are looking at, the link should take you directly to the correct p/n (57BYGH803) for $29.30. Steppers can be travel limited by mechanical (physical stops) or software (programmable limits) but not within the motor itself since it doesn't know where it is. Software has to 'home' the motor to a stop or electronic limit (opto or mechanical switch) prior to counting steps. Zax.

Hi again Zax, after all said and done with suspecting a motor problem well it seems that the motor is ok but looking at a power supply problem...I spoke with the fellow I purchased the machine from and thats what he thinks is gone because of how the motor is performing. I have opened the side panel to have a look but for the life of me I cant identify where the power supply is and I dont think he is referring to the laser power supply at the bottom of the machine or is he maybe?? I havent been able to speak again with the seller because he has gone out of town so I thought to ask you. The machine I have again is an IE 500

Terry

[zax15uk]

Terry,

The motor drivers should be located behind the lower right cover. What is the actual issue? I've seen very few failures from the motor drivers unless you push the gantry around a lot and create back EMF - and even then you'd have to be unlucky.

The simplest way to check is to swap the motor cables.

Zax.

[terry32506]

Originally Posted by zax15uk Terry, The motor drivers should be located behind the lower right cover. What is the actual issue? I've seen very few failures from the motor drivers unless you push the gantry around a lot and create back EMF - and even then you'd have to be unlucky. The simplest way to check is to swap the motor cables. Zax.

Ok the actual issue with the motor is when I send power to the stepper motor from the pc board on the laser engraver it runs very slow, laboring and that happens on both directions clockwise/counter clockwise. The other stepping motors in the machine work fine and when I turn the shaft by hand they feel the same as the one thats laboring so im pretty sure its not a motor issue..I am running the LaserCut 4.0 software and recently I had done some Machine config changes and maybe its a coincidence but it was shortly after I done those changes this motor issue arrised..Could the Machine config settings play a roll in this you think?

[zax15uk]

It certainly could be the configuration - in fact this sounds most logical.

Is this the table lift or one of the axis?

Say it's the Y-axis, if you move it from the origin (0) to a set point does it move the correct distance? If you then move it back to the origin does it end in the exact location it started?

If so, it's the configuration.

Here's why. The stepper has fixed increments, so for it to run slow it is either losing steps (could be due to mechanical, motor or driver fault) or being sent slower pulses. When steppers lose steps they do not recover them unless they have encoders (rare) so it will be short of the commanded distance.

Zax.

[terry32506]

Originally Posted by zax15uk It certainly could be the configuration - in fact this sounds most logical. Is this the table lift or one of the axis? Say it's the Y-axis, if you move it from the origin (0) to a set point does it move the correct distance? If you then move it back to the origin does it end in the exact location it started? If so, it's the configuration. Here's why. The stepper has fixed increments, so for it to run slow it is either losing steps (could be due to mechanical, motor or driver fault) or being sent slower pulses. When steppers lose steps they do not recover them unless they have encoders (rare) so it will be short of the commanded distance. Zax.

I think i got confused with your questio the y axis versus the lift...The motor is controlling the lift , the other two motors to control X and Y axis I believe work fine, and when I hit the origin it goes back to the upper right side as I have it set that way in the configs. I should also note that in the manual the machine configs did not work well with the machine therfor the previous owner had made the values lower then what it said in the manual, so prior to making more changes I had written down what the previous owner had for settings..I could go back to those original settings but I will wait to hear what you have to say , that might do more harm to the settings that I have already messed around with.

Hi Zax, it is the table lift and im sure your right on target with what your saying. I should have known better if it aint broke dont fix it..I was trying to make axis adjustments..To answer your question about the y axis distance of travel yes your correct it ends in the exact location it started...So now a matter of resetting the machine config or have a recommendation what I should do?