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I am upgrading a lathe with ANILAM control with DC servos. On that side I have no problem. The problem is with the turret for the automatic tool change. This turret is manufactured by BARUFFALDI and model TOE 100. The tool change is completely electric and the motor is 3-phase AC. It has a 4-bit absolute encoder plus a parity signal and a strobe signal. I have consulted all the components for managing lathe turrets, including the carousel, but due to the way it operates, none of them fit its operation. For what reason? All tool changes include the change of motor rotation direction, this is done by the carousel but automatically and only when the motor initially rotates forward, then if the time of the carousel pin is programmed.N.rev-pulse it will rotate in the opposite direction, but when the initial movement is in reverse it does not change direction subsequently. I understand that this function is for some type of ATC on Boxford and Emco lathes. Another problem is that the strobe pin is usually used to indicate that the position feedback signal is valid. In this turret, this encoder output does the same but in the operation of the turret it is used differently, it is not used to indicate the valid position of the selected tool, but to indicate when the strobe signal falling, but from the previous tool to the one selected, for example from T1 to T3, what is used is when the stobe signal of the tool T2 is falling and if the change is from T1 to T11, the turret rotates in the opposite direction along the smaller path , and what is used is the falling side of the strobe signal from tool T12. And what is the use given to this signal in the operation of this turret, when the drop in the strobe signal of the tool previous to the selected one is detected, this activates a solenoid that drives a cam, which initially lowers to the edge of the axis that rotates the turret and later when the axis continues rotating that cam falls into a slot inside the axis, this slot corresponds to the selector tool, which causes this cam to block a crown and in turn when completely lowered by The action of the solenoid activates a proximity sensor that changes direction of the motor rotation in the opposite direction to the initial rotation, this causes the motor to push a piece forward blocking the turret and also activates the signal from a proximity sensor indicating that The turret is locked and this in turn stops the motor and activates the magnetic brake on the turret motor.In this video you can see how the TOE 100 turret is unlocked. Initially the motor rotates an internal crown that causes the crown locking proximity sensor to be deactivated, this can be seen at the top, then it looks like The piece that locks the turret moves backwards, unlocking it and then you can see how the axis that rotates the turret begins to rotate, you initially see that the edge of the turret axis appears and then a slot appears that corresponds to the position correctness of each tool. The blockage was already explained previously.

These photos show the turret locked and unlocked as well as the soleinoid deactivated and activated.     

 


 

 

About ready to run a prototype...

 

Sounds good. Ill start poking around with a multimeter this evening.

How about this?
linuxcnc.org/docs/stable/html/gui/halui.html#_feed_override

Of course you can do this with python code too.

andypugh wrote:

All you really need to do is figure out whether the common wire is a ground or a voltage. With the multimeter in voltage mode look for a wire that stays at a constant voltage WRT ground regardless of the position of the knob.

I meant to go on to say that, once the inputs are connected to inputs in LinuxCNC we can work out the encoding then. 
 

The switches seem to be generic wafer switches, so as PCW says, you might need to figure out the wiring/encoding with a multimeter.

15 positions and 5 wires hints at binary encoding but it could be straight binary or gray-coded.

One wire will be common, and then others will be connected to that (probably through diodes) . If this is the case then you would need to set your multimeter to diode-check mode as the ususal voltage used to measure continuity is too low to overcome the forward voltage drop in diodes.

All you really need to do is figure out whether the common wire is a ground or a voltage. With the multimeter in voltage mode look for a wire that stays at a constant voltage WRT ground regardless of the position of the knob.

meister wrote:

Hi means an output for RC-Servos

Yes, exactly, a three wire RC servo to control the gripper.  I overlooked how to control this pseudo axis.

The switch is possibly binary encoded so there may be one common
connection and 4 outputs. Unless you have further details on the
switch, you will likely need to determine its operation with an
ohmmeter.

 

Not shure if this is what you looking for

www.forum.linuxcnc.org/38-general-linuxc...tter-control?start=0

Good morning everyone.
I have a Fry ET18 lathe I am in the process of updating. I am using a Mesa 7i77 and 6i25 board. The lathe has rotary switches for both feed and speed overrides, which I would like to use. The problem is that I cannot find any documentation on the switches, and therefore dont know how to wire them into the Mesa
I attached the factory wiring diagram, and a few pictures of the switches. They are 15 position switches, have 5 wires coming out of them, and appear to be '4 deck' switches from what I can tell. The numbers on the back of the switches are C4D0115N-4471 and I think they are made by Electroswitch. The only documentation I was able to find is from Mouser (here is the link: www.mouser.com/datasheet/2/128/c4-2309149.pdf) but I still could make sense of how the wiring would work...with only 5 wires, how is it possible to make 15 different unique positions??? I am assuming at least one of the wires must be DC power?

Thanks folks!


EDIT:
I now believe it is possible to have 15 combinations with one pole and 4 outputs. I have attached that image as well. 

EddySPalm wrote:

Does this mean I can control all AC servos (1x 1kW for the spindle, plus 2x 200W for X and Z) with only the RS485 interface?
 

This is my personal opinion, so take it as such, i would never use RS485 to control a cnc machine, ever.
It works, i have seen it used on industrial machines for automated food and drink lines, but never on a cnc machine to actually control machine axis, it is used on some ATC, vacuum hold downs, some hydraulic stuff, spindle feedback, etc.

A 7I84 or 7I73 are common Serial expansion devices used with the 7I96S

It sound like the drive support Modbus. There is experimental Modbus support
for the 7I96s (and most Mesa cards) but it still has a few known bugs