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Post by juliang on May 8, 2017 19:45:50 GMT
Hey Everyone. I was super excited to get my M3 in the mail I pulled an all nighter and got it built. I waited till I got some rest to come back to it and do the electrical portion which was challenging for me but got it figured out. I have got the machine all fired up and was running through the steps but during the homing it would always fail. Sometime the x axis would get about an inch from the trigger and just stop with a homing fail alert. Other times it would hit the trigger and just stop and go no further. I will try to upload a video but wondering if in the meantime there are any tips. Also the motors are really hot to the touch...is this normal?
Thanks in advance!
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Post by Derek the Admin on May 8, 2017 19:53:32 GMT
Did you configure the drivers to 0.6 volts? Hot to the touch is ok. Essentially about 130 or 140 degrees F is ok. 200 degrees is not.
How are the other axis behaving on homing? Anything really electrically noisy running nearby? It's most likely some electrical noise causing it to stop. Does it alert a homing fail after a period of time or does it stop moving then immediately indicate a homing fail?
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Post by juliang on May 10, 2017 10:43:10 GMT
Thanks Derek. While I was waiting for my kit to arrive I read through almost the whole forum and I really appreciate how responsive and helpful you are. And I apologize in advance because I fear I may keep you busy with all my questions.
So I was doing a bunch of things wrong. First my X and Z motors were crossed. The pulleys were not screwed down to well. Then the homing wires were crossed and I missed the part that the RED wires need to be plugged in on the left side. I very slowly figured this all out but I've got all that sorted out now.
My issue now is that when I initiate homing the Z axis raises, hits, and backs off. It starts going up slowly but every once in a while the motor slips slightly and it never re-triggers. I re-read this portion of the manual and I did miss that one of the pulley screws needs to be against the flat part of the motor so I corrected that but it has not fixed my issue. Any ideas on why the pulley would slip? Is it too much tension...not enough? I feel my tension is good. I don't have my drill loaded on yet so I'm concerned with the added weight it will slip even more.
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Post by Derek the Admin on May 10, 2017 12:40:55 GMT
Glad to hear you are making progress. How are you determining that the belt or pulley is actually slipping? This is often something you can actually see under close inspection. The configuration of the Z belt assembly has the most tooth engagement possible, so the belt would have to be very loose to jump cogs whenever it's not under load. What happens if you command a $X (to unlock the machine and bypass homing) then use the Z jog buttons in UGS?
Are the drivers set to 0.6v? Too much and you will blow drivers, melt windings, blow the supply etc. Too little and you won't get proper movement. Are you sure the multimeter is set to the proper setting? I have seen it before where someone had the multimeter set to millivolts and set .06 volts instead of 0.6 Volts.
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Post by juliang on May 10, 2017 20:47:21 GMT
From what I can see is that it's the motor that is slipping. The pulley is on tight and the belt has a good grip but the motor slips. From watching it several times I thought it might be the tension from the spring pushing it down but I tweaked that a little and it's making no difference. Here is a link to a video of what I'm talking about I have an analog meter which I'm not a 100% I know how to read it but I did use a 1.5v battery as my reference so I'm fairly confident. Maybe it will be worth getting a more expensive multimeter just to make sure. Thanks again.
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Post by Derek the Admin on May 11, 2017 2:47:07 GMT
Thanks for posting the vid. For the sake of diagnoses, was the background noise stepper motor noise or something else?
This looks to me like an issue with power to the stepper motor or connection. There are a few things that I recommend to get to the bottom of it. First, stop homing for a minute and try some manual jogs (this is when you hit the arrow keys on the buttons on the machine control screen of UGS). Type $X into the command line to unlock without homing. Hit the Z- jog button and see if it goes down. Hit Z+ and see if it goes up. Does it repeat. Jog X and Y to see if you have movement on the other two axes.
How do you have the stepper motor set? Are you by chance one prong off on the motor connection? I've done this before myself... where you plug it off and it's one pin or or down on the 4 pin header.
EDIT: Also wondering if you've been into Easel at all? That software has a trap or two that will reflash your settings after it kind of directs you to click a couple things you don't think are going to reset your settings. If you have, give us a screen shot of your settings which can be seen by typing $$ in the command line.
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Post by juliang on May 11, 2017 9:42:28 GMT
It looks like it was a voltage problem...it was a bit too high. I got it all set correct and ran a homing process and it worked! I do have an issue with the Supernight AC adapter. It appears to have a short as it does not always power up. At first, I was able to toggle it a bit and get it to work but now that is no longer working. Can I order a new one? And do you think this is something I may have caused or just a faulty unit...just want to make sure I don't do it again if it was my fault.
Thanks
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Post by Derek the Admin on May 11, 2017 11:07:19 GMT
Not sure. The over voltage is more likely to take the motor and driver down before it takes the supply, plus there is enough head room in the supply for even another motor. We can handle this under warranty at no cost to you. Before we do, however, can you confirm that there Ius no issue with your connections through the power supply adapter into the board screw terminals?
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