Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: dodiano on June 08, 2006, 01:46:57 PM
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Hi,
I bought a CNC machine from www.3drouters.com and well for the past few days I was able to set it up and all with the Help of TOm who is the person that makes and sells these machines, Now for the past few days and literally 100 emails later we can make the machine Jog at around 56 Ipm´s but the motor when it senses a small dent or stop it turns back...
I jog the machine with the Jogging mode and the Axis moves freely but it just detects a little stops it returns so this motor oscillation when making a g code proggram doesn´t allow the machine to move if I want to cut a straight line on hte X axis of 8 inches for example it runs only 5 or less total travel because of the oscillation. Machine has been set per instruction and confirmed by the maker that the setup is correct.
ANy ideas?? Hope I explained myself.
Thanks in advance for any help.
Roberto
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Is the stop that you are talking about a switch? Is the readout showing that the axis is going in the right direction?
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Nope, No switch... actually it has v rollers mounted over a rail so if it senses like a little something on the rails the motor turns to the other side, axis goes in the right direction.
Regards,
Roberto
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Yes the readout shows wether the stepper is running backwards or at the right direction is just that it´s like the motor was too sensitive that the slightest frontal force where it is moving makes the motor turn to the other side. And when in stepping mode it wont move.
Thanks.
Roberto
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So if you are jogging the axis positive from zero and lets say you hit some dust/ dirt on the Vrail... when the axis moves the other way after hitting the dust is the readout still going positive? I am looking to see if this is a software problem or if we have a hardware problem...
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Exactly if it hits dust or something in the rail it goes to the other side but it does detect if it is eother positive or negative so if it is moving positive and it turns back it reads negative, that is on jogging mode when running the proggram it won´t step properlly and it will keep running positive that way it won´t detect the Axis changes... Is there a way to make the motors less sensitive to that??
Thanks.
Roberto
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Try turning down the Max velocity of your motors. Steppers have more torque at lower speeds so see how low you need to go it get them working right.
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Done that my friend, and that makes the axis move smoother but still does not work properlly the motors reverse too damn easilly.
Roberto
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Apparenttly and according to Tom this machine was supposed to work with a 35V power source and I received a 24V one so I think this is the problem and reason why the motors don´t seem so strong... What you think??
Regards,
Roberto
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I would check that but I think you should also check for a wire that has come lose as well... It sounds like you have one coil of the stepper motor that is not getting power all the time. Is this only happening one one axis?
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Brian, when you said something about the wiring, something came up to mind.
Check to see if the direction wirnig for that stepper is not lose. It sounds like the machine is moving, and suddenly loosing contact with the direction wire which makes the stepper turn in the direction it would if the signal were not present. So check the wiring from your parallel port to your stepper driver.
Regards
Fernando
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The thing is that is happening on all 3 axis, the dealer said that apparenttly the voltage is the problem still will re-check the cables. Thanks for the tips!
Roberto
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This is a motor problem... check the current that is going to the motors as well :)
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Will do that!! Will get back to you guys If I need more help have to get the new Power source!
Regards,
Roberto
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Hi Guys,
I change my power source I installed the 35V power source and it won´t work! It jogs very nice still have the problem that if it feels something it reverses back, but I´m getting a Jogging speed of 86ipm but I´m not getting on stepp mode enough strenght to move the axis!! When running a simple program it won´t Move on stepping mode!! ANy ideas?
Thanks.
Roberto
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Made another experiment I took out the motor, and run it on Step Jogging mode and the motor without been connected to the axis it moves back and forth back and forth by itself it won´´t keep on moving to one direction!! COuld it be wiring??
Thanks for the Help.
Roberto
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It could be wiring... Check to see that you have the stepper motor wired correctly... it sounds like you are only running one coil in the motor.
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Hi there,
WIRING was the whole issue two cables on each axis where not properlly wired once that was sorted machine is running beautifully. Now I have a question I´m having problems with Mach 2 when I turn a DXF file from AUTOCAD 2000 the arc is missing now I had one file I was able to make it work after I exploded the file but now I explode it and nothing happens?? Any ideas??
Regards,
Roberto
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Could you take a look at Mach3 :) LCAM is a better importer and is FREE :D
You can have Mach3 and Mach2 on the same computer so you will not mess up the machine.
Thank you
Brian
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Hi Brian,
Is it the same Pin output and everything else for Mach 3?? and LCAM where can I get that?
Thanks.
Roberto
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Download the development version of the Mach3 and it will have Lcam as well :) Just write down all the ports and pins settings and enter them into mach3. This should be a very simple setup :)
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Brian thanks for the help really apreciate!!
Regards,
Roberto