Taking the CNC Plunge

Yes, they will take 24o as we wire it and the European method.. These are a pretty standard universal power supply.
 
Well today was not a good day. I powered up the system after loading the UC-100 software and no motor movement. Apparently I'm not getting power to the power supplies. The light on the BoB lights so I know it has power. The relay is getting 4.06 volts on the control signal side and there is 220V on the AC inlet side of the relay but it appears no power out to the fuse panel. Have I wired the 220v circuit correctly? Could it be a faulty relay? I have a spare so I'll change it in the morning. If that doesn't solve the problem I can bypass the relay. The only problem with that is I also lose on/off switching capability. Could it be a configuration issue? Any other thoughts?

Tom S
 
Those power supplies have a LED in them that comes on when powered. Does the LED on the relay come on?

I assume it's wired something like this?

STEPPER.jpg
 
I would jump out the relay and then turn the power on and see what happens. That would tell you if the relay is not turning on. 4.6 volts may not be enough to turn it on. I know it says 3-24VDC but you never know. If you have a 12VDC wall wart, you might try that.
 
JimDawson said:
I would jump out the relay and then turn the power on and see what happens. That would tell you if the relay is not turning on. 4.6 volts may not be enough to turn it on. I know it says 3-24VDC but you never know. If you have a 12VDC wall wart, you might try that.
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I had a 15vdc transformer originally installed but changed it out for the 5vdc currently installed to power the BoB. I can easily plug it in to power the relay and see if that works. If not I'll bypass the relay.

Thanks for your help.

Tom S
 
Success!!! I bypassed the relay and the power supplies are now powered up and motors turn in both directions. What was interesting is when I changed out the 5vdc transformer for a 12vdc transformer the light on the relay did not come on. Wondering if the relays I have are correct for the installation. I'll try one of my spare relays to determine if the relay is bad.

Tom S
 
I changed out the relay and still have the same problem; no AC power through the relay. Digging through a pile of papers I found the attached wiring schematic that came with my relays. I'm confused by this diagram because it shows a connection to the #4 terminal and load. Is this correct?

I mounted the motors and ran a few tests. The X and Y axis motors run fine. The Z axis travels down but won't travel up. It makes noise in the up direction but no ball screw movement. The coupling is tight. Not sure what's going on with this because I was able to lower and raise the Z axis with my battery powered drill with little effort. I would think the 4200 oz in stepper motor would have more power than the drill.

I also tested the limit switches and nothing tripped. First thing I need to do is double check the wiring. I wired them in series but considering all the wiring I've done on this project I'm not surprised that I might have made a mistake.

I've also attached some pics of a few configuration screens. Maybe it's a setting that is the cause of the Z axis motor and limit switch issues.

I'm making progress but slowly.

Tom S

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TomS said:
I'm confused by this diagram because it shows a connection to the #4 terminal and load. Is this correct?
Click to expand...
'

I don't think you want a connection between the load and terminal 4 in this case. That would be feeding 240V to the 5 volt, I suspect that would let the magic smoke out of several components.

The PDF shows a power source of 3 to 32 VDC, driving both the relay and the load.
 
TomS said:
Not sure what's going on with this because I was able to lower and raise the Z axis with my battery powered drill with little effort. I would think the 4200 oz in stepper motor would have more power than the drill.
Click to expand...

What does your Z-axis profile look like? It kind of sounds like the accel is set a bit high. What is your step resolution set to? They seem to work better at 1/4 step or higher.
 
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