Controller wiring????????

[native34]

I have some questions regarding wiring my controller as i have problems with grounding i believe but i'm not sure and could use some help troubleshooting to make sure i don't have anymore problems. I have a CNC4PC C11 Multifunction board, Gecko G203V drives, Antec 50V 16A power supply, Kelinginc 906 In/oz Stepper motors. I have a metal enclosure The G203's are attached to a heatsink, power supply is bolted directly to the chassis. I have the main 110V power cord attached to a toggle switch the green wire is connected directly to the chassis The wires coming from the switch go to the input of the power supply. On the output side of the power supply i have the Positive side going to a fuse block then connecting to the positive side of the gG203's. The nevative side of the power supply is going to a block which then goes to the negative pin on the G203's I also have a 5V 3A power supply connected to a toggle switch and coming out of the other end of the switch is being connected to the C11 BOB power side. I have the USB Power supply connected to the Power side for the C11 and then going to the computer. coming from the BOB i have the step and direction wires going to the G203's and the common wire pin 10 going to the BOB. Now that i have my setup explained here is my question. When i attach my Multimeter set to OHMS if i connect to the chassis on - side and any of the powers + side i get a reading but if i connect to negative on power saupplies and connect to any of the positive sides except for the on that directly corresponds i get no reading is this correct or do i have a problem? Any help on this issue would be greatly appreciated

[Al_The_Man]

If you are measuring to ground and to any of the system powers supplies and you are getting anything but a close to zero resistance it means your power supplies are floating and not referenced to ground, these floating readings can be confusing and inconclusive if using a regular electronic meter.
If you intend them to be floating then they are probably OK.
Your parallel port common on your PC may show continuity to ground (zero ohms) as if anything other than a laptop, the PC power supply is usually grounded.
Al.

[native34]

I'm not sure what you mean but i tested them again and my meter goes from OL to 0.00 this is with no power on i have the controller unplugged from the wall power and not connected to the machine until i get this possible issue fixed.

[Mariss Freimanis]

Please take this the right way. I am not trying to insult you in any way.

1) Pose a question in a single sentence up front.
2) Don't run-on sentences in a long paragraph. Separate each new thought with a new paragraph.
3) Don't include needless and extraneous detail in the body of the question. Save that for the end of the post. Then it acts as further reference for your question if it's needed. Otherwise it seriously detracts from understanding the core issue of the question you are asking.

I read your post 3 times. 3 times I couldn't understand what you are asking. Please clarify your thoughts and I will try to help.

Mariss

[native34]

1. i am using 4G203v's, 1 CNC4PC BOB C11 Multifunction, 1 Antec 50V 16A Power Supply, 1 5V 3A power supply

2. I have them wired in a metal enclosure, and when i place one side of my multimeter on the chassis and the other end on my ground wires for any of my 2 power supplies i get an OHMS reading is this normal or do i have something wrong?

3. My G203's are connected to a Heatsink and the heatsink is directly mounted to the chassis when i put my volt meter on chassis and the other end on pin 10 i get a reading is this normal. Should i have the heatsink sperated from the chassis by some non conductive sheild or is Direct mounting the correct way for this to be setup?

I'm sure i have more questions i just can't think of them right now thank you for your help i am hoping to get these issues narrowed down as being problems or normal as i am not very knowledgable about electronics wiring, but am eager to learn.

[Al_The_Man]

When you say ground wires, I assume you mean the power supply commons?
You need to specify exactly WHAT the reading is in ohms and exactly the power supply terminals being tested.
Also check if the same for either polarity of the leads.
Al.

[native34]

I believe that is correct there are two wires coming from power supplies 1 red and one black. There are three wires on the power cord that goes to the 110 wall plug the green wire from that power cord is going to the chassis the rest are going to some screw terminals either on the geckos, or the BOB the black wires are what i am referring to as grond or negative. When testing these ofr resistance it starts out on my display as OL then when i connect the probes to the terminals of each power supply i get 0.00 as a reading. But if i place on lead on one power supply lets say red wir and the other lead to the 2nd power supply black i get no reading it just says OL. Now when i place my black lead from Multimeter on Chassis and then touch one of the wires on the power supply i get 0.00 as a reading.

[Al_The_Man]

It would appear that the power supplies you tested are referenced to ground through the common, if you desire them to be floating or isolated from Earth ground, then it should not take much to find out where the grounding is taking place.
There are usually not that many connections to a power supply so if you disconnect everything at the P.S. DC source and test the PS output, if this shows isolated, then you connect each circuit up in turn leaving the meter connected from PS to ground.
As soon as the 0 ohms shows on the meter then you will have to check at that particular circuit for common ground connection.
Al.