AF2028-80 Closed Loop Stepper Motor upgrade: Y-Axis/Rotary
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- Опубликовано: 2 окт 2024
- Here I have detailed the upgrade of my OMTech AF2028-80 Laser; including upgrading the Y-Axis Motor/driver to a closed loop motor as well as repurposing the existing driver to control my rotary. this along with the installation of a select switch to select between the Y-Axis Driver and the Rotary Driver. Finally, the expansion of the Alarm detect circuit to include both X and Y closed loop drivers.
The Y-Axis Closed Loop Stepper and Motor were ordered from ALIExpress as follows:
www.aliexpress...
It should be noted that the driver that comes with this motor has been shown to be suspect and needed to be replaced by a known good 2HSS57A Driver, which are available at ALI Express or Amazon.
Can you provide a link to the dual shaft motor/encoder?
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)
I have the parts coming this week to finally upgrade my X- axis. Rather than notching out the frame to prevent the larger motor hitting it, would it be possible to move the stop sensor in slightly and adjust the bed size in Lightburn to accommodate?
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)
Thabks I have been researching this mod and you confirmed my thoughts. Did you modify the driver alarm parameters to catch smaller load defaults? Have you tried stopping head while in motion to see how much force causes error?
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.
This is some good information. I don’t know how you don’t have more subscribers.
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.