Boxford A3 HSRi Axis overtravel and spindle overheating - help!

[Clive S]

Hi I have a Boxford A3HSRi which keeps diving into the work and aborting saying "Axis overtravel, machine requested to move to x= 123...

I have also noticed the spindle collet and casing getting hot - nearly too hot to touch. The spindle clamp and gantry get warm but not hot.
Boxford say its a motherboard issue. £1500 to replace so thought I'd see if anyone had experience of this before I spend money!!

Ant comments gladly received!

Many thanks

Tom

Why would the gantry and the spindle getting hot have anything to do with the mother board. .. Clive

[Tom Aylwin]

Why would the gantry and the spindle getting hot have anything to do with the mother board. .. Clive

Hi Clive,
Someone told me perhaps the heat was affecting the grease in the sliding / screw mechanisms - changing its consistency - and causing a momentary stall, hence mother board losing itself??

My instinct is it doesnt get that hot but I'm a woodworker, not a metal engineer!!

[Clive S]

Hi Clive,
Someone told me perhaps the heat was affecting the grease in the sliding / screw mechanisms - changing its consistency - and causing a momentary stall, hence mother board losing itself??

My instinct is it doesnt get that hot but I'm a woodworker, not a metal engineer!!

Ok I personally would not go down the route of changing the MB until I had checked out the mechanics.
You mention that the spindle collet get hot and clamps get warm. Have you tried running the machine without the spindle running (doing fresh air cuts) and then see if the machine loses position?.
.
You really need to give more info and a clear description of the problem you are having. ..Clive

[Tom Aylwin]

Ok I personally would not go down the route of changing the MB until I had checked out the mechanics.
You mention that the spindle collet get hot and clamps get warm. Have you tried running the machine without the spindle running (doing fresh air cuts) and then see if the machine loses position?.
.
You really need to give more info and a clear description of the problem you are having. ..Clive

Apart from my first post regarding the over-travel message I'm not sure what you need to know.

As it happens I did do a fresh air cut with the same outcome.
The first time when doing a proper cut it aborted but didn't dive into the work. Feed rate was running at 'half' speed.
Second time - the air cut - I ran at full speed (not sure why!); it did the same "Machine error - machine requested to move to x=123...blah" and aborted but this time also dived into the work before coming to a stop.
Is that any help?

[Tom Aylwin]

Apart from my first post regarding the over-travel message I'm not sure what you need to know.

As it happens I did do a fresh air cut with the same outcome.
The first time when doing a proper cut it aborted but didn't dive into the work. Feed rate was running at 'half' speed.
Second time - the air cut - I ran at full speed (not sure why!); it did the same "Machine error - machine requested to move to x=123...blah" and aborted but this time also dived into the work before coming to a stop.
Is that any help?

Also.... might it be the computer not keeping up?. The machine stalled on pretty flat part of the job so assume the computer wasnt being overloaded but mybe I'm being naive!

[Clive S]

Did you run it with the spindle off? When you did the air cut you said it dived into the work piece how much higher than the work was it? Did the spindle get hot? Do you hear any abnormal noise? ..Clive

[Tom Aylwin]

Did you run it with the spindle off? When you did the air cut you said it dived into the work piece how much higher than the work was it? Did the spindle get hot? Do you hear any abnormal noise? ..Clive

Any chance I could give you a call or vice versa?... my number is 07854774881

[Tom Aylwin]

Any chance I could give you a call or vice versa?... my number is 07854774881

Have just run the same project on an air cut. It hasnt finished but its nearly there - about 30 mins off which is closer than on a real cut buy a couple of hours.
I have noticed the x axis stepper motor is really hot - too hot to touch - is that right?