Atrump B5AC tool hanger and coolant

[Wkoenigs]

I have my Atrump b5ac mill running with 220 single phase
My coolant pump and tool changer use 3 phase motors
Is it possible to use a vfd to power them if so how would I wire them. If possible can they use the same vfd or will they need their own. Thanks

[cncsnw]

It would be a lot simpler to use one VFD per motor, but you could conceivably install a 3PDT relay, or pair of contactors, to switch the VFD output between two motors.

Here are pictures of an Automation Direct GS1 that I installed in a 2003 Maximill to allow the tool changer to run with single phase service. This customer changed out the coolant pump for a single-phase one, so he did not need a VFD for that.

[BodeRacing]

I have an Atrump A1 3T. Its 2 years old. I know that mine is a smaller but the built in coolant capacity is only 7 gallons. It is pathetic. My machine is single phase - they installed a single phase coolant pump for me. I ended up buying an external 17 gallon coolant tank and pump. I have yet to install it. Your built-in coolant system might be much better than mine.

You can use one vfd for both motors. Will they ever be on at the same time? Either way, some contactors (should be able to reuse your existing contactors) and some PLC or relay logic and you would be good to go.

You need to give us more specifics on what you have in order and want to do to give more detailed advice.

[martyscncgarage]

I have an Atrump Maximill. Same situation. HOWEVER, I installed a small VFD for the coolant pump. GS1 from Automationdirect.com cheap.
I would use small VFD's as Marc suggested.

[Wkoenigs]

Ok I’m finally getting back to this project. I have the automation direct gs1-10p2 drive. If I understand correctly
I need to hook the motor wires to the drive (t123 side) right now they are hooked to the Koyo plc out terminals. Power in on the L123 side. But where do I get the control wires from?

[cncsnw]

You should be able to re-wire the Koyo output relays to control the run signals on your GS1 drive.

It looks like basic control via the GS1 is:
- Close CM to DI1 to run forward
- Close CM to DI2 to run reverse

The attached diagram shows how Centroid wired carousel motor power through Koyo relay outputs on one ca. 1999 Atrump B8AC. It is likely yours is the same, but you should look carefully to be sure.

On that machine, five Koyo outputs were used for carousel control. Y31, Y32 and Y34 were all used for on-off control (on to run, regardless of direction), while Y27 and Y37 were used for direction control (off when running forward, on when running reverse).

If yours is like that, you could use any one of Y31, Y32 or Y34 as a "run" relay, and either Y27 or Y37 as a "direction" relay.

First remove all 240VAC connections to and from those five Koyo outputs.

Then you could, for example:
- Connect VFD/CM to Y31 COM (C1 on output module 2)
- Jumper Y31 OUT (NO1 on output module 2) over to Y37 COM (C7 on output module 2)
- Connect Y37 NC (NC7 on output module 2) to VFD/DI1
- Connect Y37 NO (NO7 on output module 2) to VFD/DI2

That way, when Y31 is off, both DI1 and DI2 will be open and the motor will not run.
When Y31 is on and Y37 is off, DI1 will be closed and the motor will run forward.
When Y31 is on and Y37 is on, DI2 will be closed and the motor will run reverse.

[Wkoenigs]

It was wired as you described. I got the plc as you recommended and tried a tool change and it says waiting for plc operation

[cncsnw]

Without trying to run a tool change, were you able to index the carousel with the "Tool Index +" and "Tool Index -" keys on the jog panel?

Can you post a Report from your control? See http://www.cncsnw.com/report.htm

Is your control still running DOS and CNC7?

"Waiting for PLC operation" can mean different things in different situations. Often it does not mean anything at all, as it was just a fleeting condition and the control has moved on from it. The most common reason for a control to genuinely stop and wait with "Waiting for PLC operation", is if you have switched to Manual spindle control, but then you run a code that tries to start the spindle with M3 or M4. It is likely that your tool-change macro uses M3 while trying to orient the spindle, so if you try to run a tool change while in Manual spindle mode, you might get that condition. However, it is hard to be sure without seeing your Report files.

[Wkoenigs]

I did try the carousel - & + buttons it didn’t do anything
Yes it still is running dos.and cnc7.
Thanks

[Wkoenigs]

I was rereading your post about wiring. When you said to disconnect all 230vac to and from those 5 outputs does that includes wire 52 and 54?