General CNC Chat > Show"N"Tell ( Your Machines)
9x20 Chinese Lathe Conversion
Hood:
Looking good Dan. Does the Ultra 5000 have limit inputs? I was thinking of using them to halt motion but found I didnt need it on the axis and on the spindles I have brakes.
Hood
Dan13:
Thanks guys.
Hood, the Ultra 5000 has an embedded controller and is intended for stand alone applications. It doesn't have any inputs/outputs tied to any hardware feature and it has a microcontroller which you can program in C to do whatever you want, so I believe you could program it for limit inputs. Are you suggesting this in place of disconnecting the motor from the drive on an Estop? Doesn't look safe to me...?
Dan
Hood:
Was just thinking out loud and curious of what the 5000 actually were like in case I came across one at the right price ;)
My thoughts on previous builds was to cut the power to the drive(like I do) but if the friction of the slides wasnt enough to brake things instantly (or very close) I was going to use the spare contact on the contactor to apply the overtravel inputs thus allowing the drive to instantly halt the motor.
Hood
Dan13:
Be aware that the Ultra 5000 don't accept any external signals (step/direction or other). They were not meant to be used with an external controller. They do have an option for electronic gear follower, however, and this is the mode I am planning to use mine in.
--- Quote from: Hood on June 20, 2012, 05:32:23 AM ---cut the power to the drive(like I do) but if the friction of the slides wasnt enough to brake things instantly (or very close) I was going to use the spare contact on the contactor to apply the overtravel inputs thus allowing the drive to instantly halt the motor.
--- End quote ---
And that is while the drive is not powered already? Not sure I would trust this. I have followed the recommendation in the Ultra manual for switching in braking resistors and it's been working great and I think I will stick with this approach.
Dan
Hood:
How are you doing the follower? Using a SS and quad output?
Not reaally sure what you were meaning by "And that is while the drive is not powered already?"
What I was meaning was I was thinking of cutting the AC to the drive and at the same time having the spare contact of the contactor act as the overtravels into the drive. Hit the E-Stop, the drives AC gets cut, this will take a second or so to use up the power in the caps but with the overtravel getting seen by the drive it should stop instantly.
The resistors are a good way to go for sure. I dont see the wiring diag in the manual I have but there are quite a few manuals on the 2098 drives so likely its in one of the others.
Hood
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