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Project "YOU Bit It Off, YOU chew it", aka installing a Bridgeport CNC

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AdeV:
David - I can't put G-code into the controller, it's a conversational thing... There is a book (in German, which I don't speak/read/write unfortunately) which has some conversational examples, I will see if I can't key one of those in.

Andrew - yep, I've got it plumbed into air. When I operate what I assume is the airbrake switch on the front of the machine, I get a very faint "clonk" noise - too faint for me to think it's actually done anything, so maybe the brakes are seized on. Then again, I can't say I've heard the main motor try to do anything, and the tool change light isn't going out, so as far a I can tell it's not even trying to run the spindle?

If I try to set the table position with a "spindle start" function, the machine sits there for a while & does nothing. so I assume something is stopping it...

awemawson:

Lub tank needs to be above the limit level, a contact on it is in the control chain iirc.

The TNC 150 can be in 'conversational' mode or ISO G code mode by changing a parameter. There is a magnetically retained overlay keyboard that sits over the usual keys and has the G code markings.

DMIOM:
Hi Ade,

will reply in more detail later - just going out now.

I use my machine in conversational so can send you simple start-up prog later.

Startup can be monitored by some extent by watching the bottom of the monitor.

Problems may also be due to a limit either genuinely being tripped or a wiring issue making it think that - limits / e-stops are usually wired using normally-closed microswitches, relays etc. so if anything fails, or a wire breaks (which is deemed more likely than a short) then the machine will fail safe.

Will also PM you my phone number - can also talk you through entering a conversational program etc.

cheers / Dave

AdeV:
:ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb:
IT'S KICKING!!!!!
:ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb:

I now have 3-axis movements and a spinny spindle - yay!

The problem was the fan motor overloading, causing a breaker trip. I didn't recognise it as a breaker, hence not pressing it sooner.... pressed it, everything started up then clonk, off it went again. Disconnected the fan motor, and then it kicked in and stayed in.

Andrew - It doesn't seem to need an air supply after all. I wonder if it used to be connected to an auto toolchanger, I believe they are air powered?

Dave - Number will be in a PM soon, thanks for the kind offer  :nrocks:


So.... next issue - the magnetic spindle brake doesn't work properly... it consists of an electromagnet, a slightly domed metal disk (I assume a magnet enhancer), a clutch which is supposed to go up & down, and a brake disc. The problem is, when assembled as per getting the machine, other than emitting a faint clonk, nothing much happened. I am able to assemble the parts in a configuration which causes the spindle brake to work (albeit weakly), but bass ackwards - i.e. applying power turns the brake on. It should be the other way around...

Can anyone who happens to have a manual :wave: tell me if there's any info about the magnetic spindle brake, e.g. how it goes together? I can at least trial run the machine without the brake, what I'm not sure of is whether it's getting all the volts it should be (~27v) and therefore is a bit on the weak side.

But, hey, IT WORKS! Thank goodness for that!

Rob.Wilson:
 :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: Truly happy for you Ade  :headbang: :headbang: :headbang: :headbang: :D


Dose this mean  you be machining engine blocks from solid now  :poke:



Rob 

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