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Ok so I've solved this problem. The servo drive board had been wired incorrectly, so the motor was turning the wrong way for a given command.
Next issue:
The Z and Y axis reference fine, but the X...

They appear to be working ok, but I will check this in the morning.

Just to update I have now loaded a new PLC code, which appears to be working ok, except for I can no longer reference the X axis. The axis travels to the first limit switch, as it should do, then...

Hi all,
When I start my 720x machine, it finds the reference points for Z and Y axis, but not X.
When the start button is pressed, the axis moves to the first limit switch, as it should do, then...

Hi all,
would anyone have PLC code file for a Bridgeport 720X running Heidenhain 2500 control?
I have just installed a new control in mine, but the PLC appears to be different, so the machine is...

I think I come under number 4 in your options.
There is a rotary encoder on the non driven end of the ball screw, which feeds back to the control.
There is also an encoder on the back of the motor...

That's great to see thank you. Since I started the thread I've actually managed to get the boards with the same numbers as yours which is good to know!

Having fitted them, sadly, I'm still getting...

Hi,
I looked at this and the 355 has different sockets, so some parts will not plug in. I am told even if I rewired them to suit, the boards are too different to work.
The earlier 150/151 boards...

Hi all.
Could anyone give me the id numbers for the two Heidenhain LE2500B circuit boards. I sent mine away for repair and they have been lost in the post, and I didn't take a copy of the numbers....

I have an ongoing problem with my Bridgeport 720x with Heidenhain 2500 control. I am getting a gross positioning error X every time I try and reference it. I have tried the following tests:
New ROD...

Hi all,

I have a yang ml-25a and have a turret indexing fault. When it indexes round to change tool it doesn't always lock into the station. You can spin the turret freely until it finds the next...

Hi
did you ever get this stripped and sorted? I have the same problem right now but can't get anything to move.

Andy

Yes the encoder was replaced with the motor

I checked for resistance end to end which was very low and even between the cables. I also flexed them while connected to check for breakages.

Hi all,
I have been getting a 414 x axis detect error alarm on my Yang ML25 lathe becoming more frequent over the last few months. When it happens it goes to a 'not ready' state and no alarm shows...

ALL SORTED!!!

So I tried turning the encoder round 120° on its three mounting screws and it's all systems go!!

csg67 I guess now this is what you meant?

Thanks every one for the input. I'm...

How do you mean conversely? I can only see one way to install it. It came pre wired (I assume the same terminations as the original as it's the same part number??) so just plugged in. There are two...

The encoder, although a slightly older serial number is the same part number. I guess even the same part numbers could have slightly different outputs that would need setting in the parameters? I...

Hi All!

I've had an ongoing fault with my Bridgeport 720X with Heidenhain 2500 control. If I rapid move the Z axis it stops and throws up a 'Z Measuring System Defective A' error. This was getting...

Ok so now my mill will release its axis, zero return and run a cycle fine but it will not start the spindle clockwise in M03. M04 is fine which is annoyingly no use. No error message appears and the...

Hi all
After a couple of trouble free years my Bridgeport has started getting temperamental.
If I run it up from cold it is fine for a few minutes then it will start disabling the axis drives. It...

Hi all
I have (another) problem with my mill. When moving in rapid in X & Y the axis 'stutter' as they move. Almost as if I am momentarily taking my finger off the button. There are no error...

Do you mean the control panel with the screen, buttons etc on it or a control board in the back of the machine?
The manual says its 3 AA battery's so as you say a tube somewhere...!

Andy.

Hi all,
Can anyone here tell me where the buffer battery is on a Bridgeport 720x interact with Heidenhain 2500 control? I am getting the message up to change it but cannot find it! I've been through...

I've changed Parameter 1390 but I'm still getting the same symptoms. Does M90 need to be on every move line? My post puts it only on the first one.

Hi
I am using TNC Remo to send programs to my mill. I am using Heidenhain language though not G code. The M90 still works the same way with it and I use it on my programs but I am not sure it is...

Hi all,
I have recently purchased a Bridgeport 720x mill with a Heidenhain TNC2500 control. I have connected a pc link to download programs from my pc but am having a few issues.
I don't seem to be...