if im not mistaken, you have a very dangerous situation. If you get a power loss your lathe will stop, but as soon as the power returns it will start spinning again. Please check to see if it is soo. Remember also to check that your e stop dossent do the same. Hope i am wrong!
I have a "704.064.2 - Stop switch actuator" that is dead... I removed all the HV systems, but now I need to short the wiring to be able to "skip" this... how can I do so?
Good video, I think you wired this correctly. But please test the estop by activating it and then press the start button to make doubley sure it doesn't start. (and mind those fingers).
I know you don't want to have high voltage in your control cab, but if the octal relay contacts weld you will have no stop control. One set of E-Stop NC contacts could break that circuit.
I thought about breaking the contactor coil voltage as well. The circuit is fused at 1 amp and I don't think the contacts can weld at that current, but maybe, haven't tested that.
@@jtkilroy I figured you probably thought of that. Fixing old equipment is always a compromise. You would have speced a low voltage coil in the first place if building from new.
@@RambozoClown I doubt there is much danger that they weld with such a small load. (Well, at least if you actually connect it to power the starter coil, and not short out the mains supply like James has drawn in the schematic for lack of a better connection point. ;-) You could use two relays or at least two contacts if you really wanted to. At work they always use a safety relay, big yellow or red thing that costs over a hundred bucks. Also two contactors in series, just in case one sticks, to meet CE. I think it is maybe a bit much safety equipment sometimes and no money is left over to employ operators with some common sense, but what do I know....
@@stefantrethan In normal operation they would be fine, but the whole point of E-Stop is for abnormal things. Never great to have a single point of failure. I sorta think of 3 phase contactors as semi redundant as even if a phase welds, they usually just sit there and hum. A lot has to do with the kind of equipment powered. Most operators don't have any sense until you beat it into them.
@@RambozoClown If you want better safety the E-Stop should have a set of normally Open contacts that when E-Stop is activated power up another Octal relay driving a "crowbar" contactor to short the 3 phase output of the main contactor. If for any reason the main contactor is still closed when this occurs, the "crowbar" will trip overloads and/or supply fuses/breakers. Additionally even when all of the rest works as intended it will shunt the motor windings to act as a brake to more quickly eliminate the danger of moving parts.
Nice work JT, but it must be; to the global suppliers, orange is red. As a red blooded American I feel safer with a RED switch lol! Unless my computer color is off, switch looks orange, not red to me? As Mr Pete says...I digress.
@@jtkilroy I tried tweeking colors on my pc, the background emergency stop plate is green now, was yellow, please don't tell me it is not a light yellow lol!
Heck. The switch would barely fit on that shipping box. Great video as usual James!
your casting looked great watched the video last night
Great video.
Glad you're son is doing great. ( he's a chip off the old block )
I would appreciate a video on how you traced the wires. Thank you
Can do...
Glad you have got it to where you can use it! How is the stairlift fundraiser coming?
Going well locally, email blast soon
Need to plan on a tare down of those arms for your "test".
👍Thanks for sharing
if im not mistaken, you have a very dangerous situation. If you get a power loss your lathe will stop, but as soon as the power returns it will start spinning again. Please check to see if it is soo. Remember also to check that your e stop dossent do the same. Hope i am wrong!
I have a "704.064.2 - Stop switch actuator" that is dead... I removed all the HV systems, but now I need to short the wiring to be able to "skip" this... how can I do so?
James I see power from the controller to L1 and L2 but not power to L3 . Just curious am I missing something
No your not missing anything except my questionable schematic drawing skills!
ENJOYED...
What's up Chuck? Love that 10EE, been enjoying your vids.
Where is a good place to learn more about modular electrical components like you used?
Don't underestimate manufacturer catalogs and brochures, they are well worth looking through.
Automation Direct web site has an extensive video library
Good video, I think you wired this correctly. But please test the estop by activating it and then press the start button to make doubley sure it doesn't start. (and mind those fingers).
I know you don't want to have high voltage in your control cab, but if the octal relay contacts weld you will have no stop control. One set of E-Stop NC contacts could break that circuit.
I thought about breaking the contactor coil voltage as well. The circuit is fused at 1 amp and I don't think the contacts can weld at that current, but maybe, haven't tested that.
@@jtkilroy I figured you probably thought of that. Fixing old equipment is always a compromise. You would have speced a low voltage coil in the first place if building from new.
@@RambozoClown I doubt there is much danger that they weld with such a small load. (Well, at least if you actually connect it to power the starter coil, and not short out the mains supply like James has drawn in the schematic for lack of a better connection point. ;-)
You could use two relays or at least two contacts if you really wanted to.
At work they always use a safety relay, big yellow or red thing that costs over a hundred bucks. Also two contactors in series, just in case one sticks, to meet CE. I think it is maybe a bit much safety equipment sometimes and no money is left over to employ operators with some common sense, but what do I know....
@@stefantrethan In normal operation they would be fine, but the whole point of E-Stop is for abnormal things. Never great to have a single point of failure. I sorta think of 3 phase contactors as semi redundant as even if a phase welds, they usually just sit there and hum. A lot has to do with the kind of equipment powered. Most operators don't have any sense until you beat it into them.
@@RambozoClown If you want better safety the E-Stop should have a set of normally Open contacts that when E-Stop is activated power up another Octal relay driving a "crowbar" contactor to short the 3 phase output of the main contactor. If for any reason the main contactor is still closed when this occurs, the "crowbar" will trip overloads and/or supply fuses/breakers. Additionally even when all of the rest works as intended it will shunt the motor windings to act as a brake to more quickly eliminate the danger of moving parts.
Nice work JT, but it must be; to the global suppliers, orange is red. As a red blooded American I feel safer with a RED switch lol! Unless my computer color is off, switch looks orange, not red to me? As Mr Pete says...I digress.
I'm glad you said something, thought it was just me.
@@jtkilroy I tried tweeking colors on my pc, the background emergency stop plate is green now, was yellow, please don't tell me it is not a light yellow lol!
Here is a easy way tho try out your schematic skill ---veppa.com/ekts/
try it its simple and a good you can try if the circuit works