Emco 240 Tool Turret

More
11 Jul 2017 10:04 #95649 by timmert
timmert replied the topic: Emco 240 Tool Turret
I use a mesa 5i25/7i76, don't know if it has enough inputs?
But the sensors for turret position is done before
wiki.linuxcnc.org/cgi-bin/wiki.pl?Contri...oolchanger_component


This is the information I found inside the motor cover
And the 2 speed wiring diagram.



More
11 Jul 2017 10:27 #95653 by andypugh
andypugh replied the topic: Emco 240 Tool Turret

timmert wrote: I use a mesa 5i25/7i76, don't know if it has enough inputs?


Yes, the 7i76 has 32 input. That should be plenty for even a very complex lathe. And you can add up to 48 more on the serial expansion port on the 7i76. And then up to 384 more on the spare header on the 5i25.

But the sensors for turret position is done before
wiki.linuxcnc.org/cgi-bin/wiki.pl?Contri...oolchanger_component


That looks like it might work, though the description says "Gray code" and I thought that your truth table looked like straight binary.
However, that is a detail. Using the built-in "carousel" HAL component might be easier through software upgrades, but it needs a bit more HAL effort to make it work. (only very slightly).

This is the information I found inside the motor cover
And the 2 speed wiring diagram.


OK, that's useful, and presumably the relays to make all that happen still exist in the control box? Do you have the required 3-phase supply?
More
11 Jul 2017 10:33 #95654 by timmert
timmert replied the topic: Emco 240 Tool Turret
Yep I got the complete (working) controls
More
11 Jul 2017 13:28 #95657 by andypugh
andypugh replied the topic: Emco 240 Tool Turret
Can you see what type of relay is used to control the ATC motor? (whether it is small enough to be driven directly by the 7i76 GPIO, or whether intermediate relays are needed)
More
11 Jul 2017 14:25 - 11 Jul 2017 14:26 #95665 by timmert
timmert replied the topic: Emco 240 Tool Turret
Fiew....somehow the wiring schema I made before disconnecting the cables came into the trashcan.
But I found it

It's one big PCB with all the relays
Cable 8 and 9 are connected to the relay (3 pin terminal block)
Last Edit: 11 Jul 2017 14:26 by timmert.
More
11 Jul 2017 14:59 #95670 by andypugh
andypugh replied the topic: Emco 240 Tool Turret
So, do the 6 wires at the bottom of the picture go to the 6 terminals on the motor, and the three terminals at the top go to a relay controlled by the motion controller? (or direct to the motion controller). In either case yo should be able to leave everything just as it is, and control the board and motor from LinuxCNC.
More
12 Jul 2017 12:24 #95723 by timmert
timmert replied the topic: Emco 240 Tool Turret
Just checked. I think it's a bit easier to install a stepper motor :laugh:
I really have no clue how to wire it since my electronics knowledge is almost 0. I really appreciate the help though! But I think I can't provide you the information you need.
I just want to get the turret working. And installing a stepper motor is a bit more straight forward I think
More
12 Jul 2017 12:42 #95726 by andypugh
andypugh replied the topic: Emco 240 Tool Turret
It's your machine.
More
06 Sep 2017 14:24 #98583 by timmert
timmert replied the topic: Emco 240 Tool Turret
I finally installed the stepper motor on the turret. Stepper is working, turret is turning.
But not sure how to approach the following. And what's the most user friendly method.

I can set the turret as a rotary axis. 360 degrees is a complete turn.
8 tool positions. 45 degrees for each tool.
The turret needs to move behind the locking pin. And a few steps back to lock it in place.
So maybe it needs to go +/- 48 degrees forward, and 5 degrees back to lock it.

Should work fine and I can manually add the G0 for the turret turn to my code. But that's not very user friendly. I would need to edit the code each time.

Isn't there a easier solution to accomplish this?
More
06 Sep 2017 15:20 #98585 by andypugh
andypugh replied the topic: Emco 240 Tool Turret
I told you not to use a stepper...

You could run the stepper motor in velocity mode, that way it doesn't matter if it slips.
Time to create page: 0.091 seconds
Powered by Kunena Forum