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Messages - cnc-it

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21
The exchange sesteps I've had from Mike are ones that come from scrapped machines I think as they have no repairs on them.
They still have the original leaky seamos buffer battery in them reading about 0.5v! (not sure if the battery does anything anyway?)

Can you write Heidenhain plc programmes or did you use one from a later all heidenhain machine just curiouse!?

I'm sure I can fill the column full of scrap metal and make it weigh around 20 tonnes, then we have a deal  ;)


22
By the way Mark can your guy repair these sesteps as Beaver Mike only does exchange and has no knowlege on how to repair them.

John.

23
The Fanuc control on this machine doesn't have the usual PC model B board so no plc at all on the Fanuc side just a connection board to take outputs from the Fanuc motherboard to the Beaver interface board (all these pin outs are in the manual).

John.

24
Yes Mark that's me from Accrington.
I spoke to Beaver Mike last time I had a sestep exchanged and he said Mark at servotek had fitted a mitsubishi plc to a Beaver with Fanuc so I had just presumed it was possible to do that but I see your point as I was wondering how the sestep did the tool numbers.

Looking at the wiring diags it seems pretty straight forward with inputs and outputs to the sestep all listed but I'm sure to be missing things having not studied it to deeply!

John.

25
Thanks Hood I will check that link.

Hi Mark the machine is on Fanuc 6ML and it has the Beaver interface board which has the TC1 and TC2 cables going out to the tool change interface board which switches solenoids and is wired to the prox sensors for the tool change arm.

John
 

26
That sounds good, maybe a different model a/d plc might be better to get more i/o though.

Most of the i/o seems to be involved with the tool changer air solenoids and checking the states of proximity sensors on the tool changer arm, the power draw bar position and the spindle orientation. Plus there is spindle drive enable, spindle drive ready, emergency stop relay, low lube pressure, low air pressure and tool number digital readout to name a few!

Input plug 1 seems to deal with T word and M words.

The interface board puts out 24v I think but will need to check that.

Are the extra modules expensive or can they be found on ebay?

John.

27
According to my Beaver manual the sestep will do up to 48 inputs and 48 outputs. I've counted approx 94 pins being used on the list in the manual.

As long as I know I can use a modern PLC that would be worth looking at..I'm on my 3rd sestep in 4 years and spares are getting hard to find not to mention the cost!

Plus when they do pack in its usually half way through a tool change!

Might try Servotek to get it running again then work on a new plc for the future.

Presumably I will need to know the voltage and current of the signals coming from the interface board to the sestep and the same for the outputs from sestep back to the interface board..?

Thanks, John.


28
Hood looking at your Automation Direct D06 plc and wondering if it is possible to fit one to my Beaver vc35. My Sestep 400 PLC has gone down and its going to cost a fortune to get an exchange for another which could also go down any time as these are very old and no one seems to know how to repair them!

The sestep has two 30 pin plugs for inputs and two 30 pin plugs for outputs. I have the full input and outputs list for the machine so I can trace each pin on the sestep to an input or output on the machine.

The 30 pin plugs come off the interface board which takes signals from the Fanuc control and sends them to the sestep. Signals then go back from the sestep to the interface board which then outputs to relays and solenoids etc

Could I connect  upto an Automation Direct plc by using female plug sockets attached to the 4 off  30 pin male ones I have now and take wires from the back of these plugs to the a/d plc input and output terminals?

Then write a new ladder for the plc?

My friend has the Boxford vmc that you fitted an Automation Direct D06 to, that gave me the idea!

John.






29
Looks like they were using the big motor to keep the torque at 6000rpm mines limited to 3500rpm. Did it use a servo spindle a 1ft5074?

John.

30
Looks like the machines are copies of each other don't know which design came first? This is one of the  early Partsmasters with the single door..most have two doors and the Z axis encoder is on the ball screw on the later machines.

It  has a 7.5 hp dc spindle motor although the manual says it should be 7.5kw but this one isn't was maybe ordered with the smaller motor not sure why though..

John

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