Let the fun begin !!! ???

**JAZZCNC** · 08-04-2015

If you have one just for testing sake then try a 10amp Mcb it may work for you to get going and check all the sytem correctly.
Don't cut corners with the electrical safety or hot wiring system just to get going as it will bite you if not careful either by frying components or not stopping as expected etc.!! . . . . I'm very confident with wiring these machines and still I get caught out when hot wiring to get some thing going so be warned.!!!

**PAULRO** · 08-04-2015

i changed out the relay and it didn't trip ! this is something that i don't uderstand , i have a bank of 8 second hand relays from a m/c that was decommissioned about 6-7 years ago so maybe it's because the one i used had some mileage up on it, i don't know. but anyway it great to resolve that issue. i had ordered a D rated MCB before i got around to changing it out so at least i will have that as a backup.
on reflection i dont think my latest dwg of the alarm circuit will cut the mustard. my understanding of open collector terminals was not correct, i'm thinking. i have my alarms in the circuit and expected them to work as normally closed contacts, so i will go with the 2nd relay as suggested by your good self Jazz .

**PAULRO** · 17-04-2015

My broadband went down early in the week so i decided to get the cable runs organised. i also fitted the home/ limit switches. i had gathered switches down the years so i decided to use them istead of sensors . Clive posted a link some posts back to some sensors that i will use if these don't work out. i also cut an opening in the door for a small window on hinges so i can see the VFD and adjust accordingly. i'm still a bit unsure about the inputs to the BOB ( which i plan to tackle next) i have a dwg. organised relating to the E/ STOP input to the BOB which i hope some will have alook at and give me the thumbs up or down.
my query related to if i have the e/stop connected to the BOB correctly . is it o.k to take a tap after the e/stop as per dwg and use this as an input? this terminal disables the enable to the drives . i'm still trying to get my head around the fact that i can hook a supply and a ground to the terminals provided without having a dead short and blowing the BOB .

**Clive S** · 17-04-2015

Are you controlling the vfd via mach3 or are you changing the speed by the panel on the vfd if so I did a post here http://www.mycncuk.com/threads/7388-...se-Spindle-VFD post 1 its a very simple mod only taking a few minutes. The front panel just clips out ..Clive

**PAULRO** · 17-04-2015

i have a breakout board that has PWM capability , from what i can gather. i haven't got around to the spindle side of the build yet! i'm trying to get my head around getting these motors to turn and getting the inputs to signal. i was hoping to get the M/C up and running with the basic controls and safety functioning and when i become comfortable with the operation going back at the spindle control. for the time being i would use the VFD . if the PWM doesn't work out , then i would definitely go the route of the link you posted, in fact it would be quicker to adjust a pot and have an instant response i would think, especially if the pot was mounted in a home made pendant that could be brought to the front of the M/C? i have my machine e/stop on a lead that i can mount either side of the machine on a hanging bracket and i could incorporate the pot and some other controls as i become more familiar with the process. by the way , is my understanding of how i should incorporate the e / stop to the BOB correct? i'm reallly not too sure if i'm right.

**Clive S** · 17-04-2015

The way I read the manual the inputs will take up to 30V there is a 1k Resistor in circuit that will limit the current at 24V to 24mA so not a dead short. Dean will no doubt pop along and give you the advise re the Estop and that bob. ..Clive

**PAULRO** · 17-04-2015

cheers Clive, i'm just hesistant at this point because of smoke fear!!!!!!!!

**JAZZCNC** · 27-04-2015

Originally Posted by Clive S

The way I read the manual the inputs will take up to 30V there is a 1k Resistor in circuit that will limit the current at 24V to 24mA so not a dead short. Dean will no doubt pop along and give you the advise re the Estop and that bob. ..Clive

Hi Paulro Clive brough this to my attention did you get this sorted.? . . . If not what's your fear with releasing magic smoke.?