Emco 240 Tool Turret
Nerd wrote: 1.In a previous asnwer i said, turn the stepper motor driver lower in power, so it can fasten your lock system with a step over.
Doesn't the drive switch to error mode once it can't move no further?
The adjustment of power of the stepper motor driver you can do with dip switches normally at the front.
A stepper motor driver is like hufter proof. They don't like cable problem's between motor and driver. And they don't like a
dc transformer that has been overfloaded by to high net current.
2.Yes, I used often use a 14mm shaft pulley belt with 22 teeth on the motor side. "T5-22-15-14"
Can't you replace the small pulley at motor side for a bigger one?
In Linux you can adjust your rotary step's/revelution. I think it's called "Pitch" in Linux.
3.You can look for Andy's input's. We can learn about this.
4.In my mail i send a g code example like
This code can be the basis for a Macro to lock your turret in place. 45 degrees is a 8 turret position machine.
So it's getting 5 degrees further and go's dan finally -2 degrees step over.
This kind of programming you can do incremental on the macro side. This make's everything easyer.
I don't have a spec sheet of the motor. I know it's a 2 speed 380V motor, and it got 10 wires. That's about it. I don't have any knowledge about electronics. So i think the easiest way to get this working is to replace the motor for a stepper motor like nerd suggested. And set it up as a A axis.
andypugh wrote: The carousel hal component can probably help with controlling your changer and interpreting the optos.
I think that you would need to configure as uni-directional and use carousel.N.motor-fwd to run the motor forwards and carousel.N.ready (rather than ...rev) to run the motor backwards to the pawl.
Do you know what the 10 wires on your motor are for?
There is a nice set of diagrams here, but only the 3-speed ones seem to have 10 wires.
timmert wrote: So i think the easiest way to get this working is to replace the motor for a stepper motor like nerd suggested. And set it up as a A axis.
How would you incorporate the opto-sensors into this scheme?
Are all the wires on the existing motor the same size?
This is the the wiring of the stock motor.
The right terminal block got 2 wires connected
the left terminal block got 1 wire connect
I think these are for forward/reverse.
The block on the motor got 6 wires connected (cable numbers 1 to 6)
I think that is silly.
timmert wrote: I won't use the opto sensors. Each time when I start LinuxCNC I need to manually set the tool number according to turret position
I think that might be a perfectly normal 3-phase motor (6-wires, dual voltage) with a temperature sensor and a brake.
Does the motor turn freely when not powered up?
timmert wrote: motor turns freely
Probably not a brake then.
I would expect to see 6 wires all the same size that are the ends of the 3-phase windings going to the 6-way connector block.
That block is fairly standard as a way to enable a motor to be wired "star" (Or Wye or Y) for 400V operation or "delta" (or ∆) for 200V operation.
They seem to have taken all 6 wires back to the controller, which suggest that they got the two speeds by running delta forwards and star backwards and re-arranging in the controller.
It ought to be fairly easy to achieve the same thing with a low-power VFD nowadays. I am not sure that doing that makes sense, but it would be simple to operate from LinuxCNC logic at least.
timmert wrote: Hi Andy
Just to be sure...you mean if the motor turns freely when no power is on the motor?
Yes, the brakes are normally spring-applied and released by an applied voltage.
Can you measure the resistance between every wire and every other wire, that should give us some clues. (admittedly that's a lot of combinations)
You can use the orginal home print switches of the turret, but you need a "bit 0-7" logica to see where the turret position is. So you need al of the orginal sensor input.
If we have a I/O controller with plenty I/O it's a good hufter proof way to see where the turret position is.
But most of the sheep's here have only 5 input's to spend for the whole system with an old pc hihi.
A low power vdf turn's the turret like an grizly bear. So it's good to do this way, i agree, i unlike waiting to see the turret moving.
It's better like 1 second boomm. Ready to go for second tool. I wondering how Style machine's are doing this. Their software is like god for lathe.