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@@Ikarazu unfortunately, there are numerous different lasers out there. Each may share similarities, but invariably, there will be differences. I glad you were able to upgrade your machine and how you will experience vast improvements

@@jamesalexander5388 Yup! So many different omtech models. Thanks for all your videos, just wired in the Y Axis as well - Ordered parts for the Alarm / Alarm reset as well. Your videos are easy to follow, Even if the machines aren't exactly the same...your explanations as well as detailed "Why" you do things makes incorporating them into a different model easy, much appreciated!

Not exactly sure what your are suggesting, but, when the Alarm function activates, Alm+ and Alm- are not shorted, the pass Vcc and Grnd - Vcc to Alm+ and Grnd to Alm-

I chose the 36VDC power supply for two reasons. First, because I was adding another driver to power the rotary, I was concerned with the power of the stock power supply being maxed out. The second reason was the increased torque at the X and Y axis stepper motors due to the increased voltage.

That is definitely on my wish list…

@@jamesalexander5388 well I had no choice as mine oem tube decided to fire in a donut shaped beam. Decided I would bite the bullet and just get a A grade tube not whatever they decided to send as a replacement.

If the alarm is on, it could be a few different issues. One, the motor is hitting something and it tripping. Two, something is wrong with the wiring… best to DM me through Facebook messenger facebook.com/jimAlexander1961

You need to be sure the motor you selected will fit. You will also need a pulley to match the one on your current stepper (most are pressed on and hard to reuse).

Are you sure your machine uses Nema 24?, most use Nema 23

I didn’t know that the number was equivalent to the size of the mount. I just received the motor, I was in my way to install it. If it does not fit, I will order the 23. As far as wiring. Is that similar to what o already have installed?

@@renanuspfzea for wiring, most is already there from the stock open loop stepper motors. The only added wire is the encoder feed back from the stepper motor to the driver, which comes with closed loop motor.

@@jamesalexander5388 I can’t emphasize more how I’m thankful for not only the awesome video you made and also replying to all comments. You worth more than gold!! 😀🙌

Answered your question on your comment on the other video…

I don’t see why not. The amount, needed to notch is not a huge amount. Mind you, if you move the sensor and adjust the bed size, you only loose 5mm, maybe

@@jamesalexander5388I think I'm overthinking this - can probably just glue a small piece of ferrous metal to the Y-gantry to trigger the magnetic limit switch ~5mm sooner

@@JensRatsey pretty sure that will work as well

@@jamesalexander5388I have my new x closed loop driver and motor installed - you're right, not for the feint hearted! The motor is so tight against the metal trough that the new track runs in that I can barely get a piece of paper in there, yet it doesn't rub at all. I need to add my y-limit sensor trigger but holding a screwdriver over it for now works fine while I test. So all good so far - except that when I power up now, my z-axis just continues to lift the bed until I hit Escape on the controller. I removed the AF sensor a while back and took the opportunity to completely remove the wiring this time - is something still expected there? Before it would raise momentarily and then stop. Seems I'm missing a NO or NC connection somewhere. Any suggestions? Also wondering what you're settings are for the new x-axis - speeds and acceleration?

@@JensRatsey you will have to go into the Machine Settings, under the Z-Axis, and disable the homing function (I don’t know exactly what it is called, but you should know it when you see it)

The link for the closed loop dual shaft motor is in the description. It comes with a driver, but I opted to use a different one (same driver as I used for the X-Axis)

Exactly. Also, the closed loop uses a different driver, that is capable of reading the encoder.

Unfair comparison as pointed out, the open loop motor has no encoder. Maybe re do it in a fair way or better to do this comparison to show acceleration & torque, also interestingly I can use my closed loop motors with my open loop driver (no encoder wired but not the other way round

Because it prevents them from becoming entangled as the gantry is moving forward and aft, and also keeps everything neat and tidy.

There are a number of motors and drivers out there. Amazon has a set, www.amazon.ca/RTELLIGENT-Stepper-Driver-Closed-Encoder/dp/B08692LFRH/ref=sr_1_50?crid=3UDQ386RWSGQA&keywords=nema+23+closed+loop+stepper+motor&qid=1670613692&sprefix=Nema+23+closed+loop%2Caps%2C87&sr=8-50

You will have to give me a little more… do you mean why why was mine tripping? There are a number of reasons an axis may trip - an obstruction on the bed is most likely. I have had it, in the past, where I was engraving inside a bowl, and forgot the machine would try to home after… when it struck the side of the bowl, the driver tripped.

Agreed, in part. Yes, the motor does not need to be as large as the one I choose, but it was the most readily available for a descent price. As for it fighting it’s own inertia, the physical size difference is not that much larger and as such any increase in inertia is more than compensated by the increase in torque. So far, I have been operating the X-Axis for over two months and have been impressed by the increased resolution and accuracy of the closed loop, over the open loop. All in all, as I have said in the past, I consider this the upgrade to have the most beneficial improvements, over all the other upgrades I have done to my machine.

I made no mods to the Driver default settings. So they are all as they were. As for testing, I ran extensive tests, by turning off the limit switches. When the head hits an obstruction, the alarm energizes the relay, braking the door protect circuit, which disables the laser. Once I was satisfied, and started using it, I did inadvertently hit an obstruction, while lazing, and it worked as expected. Only down side (and I am working on a solution) is the drivers need to have the power to them cycled to reset the alarm. Looking at adding a rest power interrupter to the drivers.

I have two of these lasers, and do my best to follow your every instruction

I am not on any forum’s, so the only ones who know of my work are those that happen across it or search for the AF2028…

@@redsixonefive best of luck. These machine can be very capable and highly reliable when using the right components.

Not yet. The original idea was to use a single shaft Nema23 with a Cloudray reducer, but I realized it would block the pass through, so I am, now, going for a dual shaft motor from Ali Express.

@@jamesalexander5388 yes I was curious about this as well. Does OMtech use the same type of motor for the y axis as they did for the X axis aside from it being dual shaft? I have found just a few closed loop dual shaft motors.

@@anthonymyers-35 depends on the machine, I am guessing. On my AF2028-80, they use a Nema23 1.2Nm single shaft motor for the X-axis and a Nema23 1.2Nm dual shaft for the Y-Axis. I replaced the X-axis with a Nema23 2.0Nm closed loop motor with a 2HSS57 driver.

No, they are not. However, only the X and Y would need to be replaced. The X-axis is the most straight forward; Standard Nema23 closed loop motor and driver. Y-Axis has been an ongoing problem for me. At first I thought is could use a standard Nema23 with a Cloudray Reducer to compensate for the dual shaft motor on that axis. Unfortunately I forgot about the pass through, which would have been blocked had I installed the closed loop on that axis. As such,mi am now looking at a dual shaft closed loop stepper and driver, from ALI Express. More to follow.

@@jamesalexander5388 man, thank you so much. I haven't been able to find anyone who knows about this..lol Isn't there different sizes..like 2.1 or something else...sorry not really sure. You said the y axis is something different? I'm sure I'll be following intently and picking your brain. Thanks again! Great stuff

@@anthonymyers-35 the stock X-Axis stepper motor was a Nema 23 1.26Nm open loop motor. This motor is only 2.2” deep, where as the motor I selected is the Nema 23 2Nm, which is 3 3/4” deep due to the encoder on the back. It is just small enough to fit in the AF2028-80, although I had to cut out a small section of a bracket to allow the full travel of the Y-Axis.

@@jamesalexander5388 is there a smaller version of nema closed loop servo

Had to watch your video a few times...lol really informative

Thanks, they make a huge difference

Just got an OMTech and would love to do these upgrades

Links to the motors, sprockets and drag chain are in the description

first, I am expecting reliable speeds, on the Y-axis up to 500mms and 1000mms on the X. Previously, I could not exceed 250mms on the X without loosing steps. I am also expecting improved acceleration and offset performance.