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Probable spindle pulse encoder fault or belt as suggested.

Without an rpm feedback the axis will stand still. Check and see if there is an rpm value on the monitor screen.

You usually have to press a pallet select button (L or R pallet) to start a pallet change cycle. The machine could be waiting for the pallet door open signal, table unclamp, pallet change program pos...

Try removing the 24v wire from the unit, power on and see if you get the unit up without a blowing the fuse, if yes there will be lots of PLC errors on the screen.

If the fuse blows with only the...

Have you checked to see what is making F000.3 go high or stay high in the ladder ?

The enable (run) signal on a spindle drive is usually a 24vdc signal that is removed from the input i.e. the signal goes "low".

As SLD has said it could be a sticking relay, or a bad PMC output,...

Check the lubrication of the ballscrew and ways, seems to me to be a tight axis.

Check the axis % load on the axis servo page.

You may need to support the axis on a block and undo to ballscrew...

This might help (not shouting, just copied text)

SPINDLE ORIENT POSITION SETTING.

THE KEY MUST BE CENTERED TO TOOL CHANGE ARM WHEN THE ARM IS AT THE ENGAGE POSITION, LOOK UNDER SPINDLE.
ANY...

There may be an OEM PLC "bit select" option to set. Option "bits" are often written in the original OEM paperwork delivered with the machine.

Have a look for the input addresses on the electrical...

I think you need to find out if your machine has a C axis or an indexer.

C axis should hold position like any other machine axis, whereas an indexer will usually dial to position and then be held...

Grus Thomas,
und zwar, zu viel mutter endspiel oder ? z.b. die hydraulische mutter war zu lose und eingestellt nichts.

So, there was too much end play in the locknut i.e. the nut was not...

Remember that not all cycles are active in your control, some have to be activated at an extra charge by Meldas, similar situation to Fanuc options.

Superman you are correct that M20/21 can be used in this way, indeed I recommended this in a previous thread a while ago.

Once again I have to repeat that I know all this, I worked for many years on Meldas controls in many guises.

I didn't really need to be appraised of their respective differences because I know...

Onthebumper, if you read my original post you will see I wasn't confused as you put it.

I stated there was a difference with Mazatrol and Meldas and my info "might" help.

The difference is that...

Check the motor and feedback cables are good and connectors are tight.

Hmmm, I thought these machine controls were cut down Fanuc (OT) controllers designed to be used in auto/ semi auto or as a manual machine.

Can't Fanuc software be used for file transfer ?

I think "Al's" comments are lost in translation, I cant really grasp what point he is trying to make. The 1" = 25.4mm is easily accurate enough for any turned or milled part, it is however dangerous...

This might sound a little simplistic, but are you sure the orientation can happen in both gear ranges? As an interrim fix, put a speed in that changes to the range in which it will orient.

If...

On the bumper, are you refering to these addresses on the "check" page ?

ie; H 66 byte 9 set all to zero, input ??

Is there a password to set "ncpara" or "1001" for example ?

On the Meldas...

It been a long time since I worked on the system 10, but I think you have lost the battery and corrupted the memory.

You need to replace the NC batteries then clear the memory, then you will need...

Can you please write what the text for alarm 1184 is please. It would be of great help.

It could be axis overspeed error, maybe you have lost axis belt tension or a problem with the axis motor...

errr..... pardon my ignorance, but are we talking about spindle orientation; "keylock" position we used to call it or, Z axis positioning for a tool change ?

If its orientation; could be the...

This might help, you need to initialise the memory to delete the spurious data


DELETE MEMORY.
1.NC OFF.
2. PUT TOP SWITCH ON FX01 PRINT TO UP POSITION.
3.NC ON. KEEP EMERGENCY STOP BUTTON...

sounds like you have a problem with the magazine counter. Look at the wiring diagrams and find the inputs for magazine count. It could be a series of switches or an angle encoder, but parity error...

Don't know how old your Okuma is, but it could be one of the drive enable/ release ice cube relays is stuck. Try tapping each one lightly with a screwdriver handle and see if anything happens. But,...

No, but maybe you should have a local sheet metal company make a set up in steel. Use your old ones as a pattern.

When a machine is delivered 4th axis ready there is sometimes some dummy plugs pushed in where the axis plugs should go (motor and feedback).

If you have these, power off and plug them in the axis...

Good advise as always from underthetyre, but remember the switches both need change 1 to 0 (both work) if you have two 1's or two 0's there wont be a "fin" signal.

In your case M11, the bar feed...

Blaineh, as a service engineer for over 20 years I have found that 8 times out of ten the simplest faults are easily missed by people starting their fault finding process at the most complex...

Have you measured physical backlash in the worm drive ?

You need to use a bar and indicator every 15/ 30 degrees and pull and push the bar and measure the free play. If the free play is the same...