EGX-400/600 TS-400 Z motor lock

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paolo8453
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EGX-400/600 TS-400 Z motor lock

Post by paolo8453 » Sat Oct 12, 2013 12:46 pm

Hey folks! It's been a while and the fact I'm back can mean only one thing - I need help again ;)

I have a problem with a 'Z motor lock' error. It only occurs with rapid acceleration - never under normal moving conditions.

An example is when setting Z Zero with the sensor. Once the machine touches the sensor and zeros, it does a rapid move up. Z lock!!!

So before I go ripping the machine apart - is there anything obvious I should be looking for?

The servos - even if I could source one - will be more than the machine is worth.


Servo is -

SHINANO KENSHI
LA052-040E7N03


Not sure if the other 2 servos are the same kind - will take machine apart in the next few days.

Cheers.
Last edited by paolo8453 on Fri Oct 10, 2014 8:58 pm, edited 1 time in total.
Hardware: TS-400 which seems to be the same as an EGX-400/600...

paolo8453
Bronze Member
Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: TS-400 Z motor lock

Post by paolo8453 » Sat Oct 12, 2013 1:44 pm

It helps to talk it through... :D

Seems to be mechanical. If I put upward pressure on the cutting assembly I don't get the lock! Strip, clean and rebuild time?
Hardware: TS-400 which seems to be the same as an EGX-400/600...

paolo8453
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Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: TS-400 Z motor lock

Post by paolo8453 » Sun Oct 13, 2013 12:30 pm

Panic over - seems to be as good as new after a strip and clean 8-)
Hardware: TS-400 which seems to be the same as an EGX-400/600...

paolo8453
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Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: TS-400 Z motor lock

Post by paolo8453 » Fri Oct 10, 2014 8:56 pm

Ha - how bizarre! Pretty much a year to the day when I last had this problem. It must be that time of year again when I venture back in to the garage for dark night activities :D

Anyway - same problem - it's doing my head in. It locks when retracting the cutting head - as in 'going up'. It's fine at slow speeds but locks when going fast - like the split second after setting 'z zero'

It's also usually fine after about 15 minutes of manually raising and lowering the cutter - like it's just limbering up ;)

In really cold conditions - applying extreme heat with a heat gun seems to sort it too.

The screw doesn't seem tight and is well lubricated.

Any ideas at all?
Hardware: TS-400 which seems to be the same as an EGX-400/600...

paolo8453
Bronze Member
Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: EGX-400/600 TS-400 Z motor lock

Post by paolo8453 » Mon Oct 13, 2014 4:19 pm

Can almost imagine the tumbleweed in this forum ;)
Hardware: TS-400 which seems to be the same as an EGX-400/600...

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Kai Perry
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Re: EGX-400/600 TS-400 Z motor lock

Post by Kai Perry » Tue Oct 14, 2014 12:34 pm

What is the temp where the machine is?

The operating environment is - Temperature: 5 to 40°C (41 to 104°F) humidity: 35 to 80 % (no condensation).

Anything out of this range would make the machine potentially fail.
Kai Perry
Application Engineer
Roland DG (UK) Ltd
http://www.rolanddg.co.uk

paolo8453
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Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: EGX-400/600 TS-400 Z motor lock

Post by paolo8453 » Tue Oct 14, 2014 5:43 pm

It happens at summer temps +15°C and colder too. The heat gun trick seems to work in the middle of winter. This would suggest it's mechanical.

There's no play anywhere I can see/feel. It's been cleaned and the screw lubed.

It's the initial acceleration of a quick move that locks it up. Once it's working it generally stays working - until the next time which is usually weeks.

It's just frustrating that when I suddenly have some inspiration to do something, I spend 40 minutes getting the machine working!
Hardware: TS-400 which seems to be the same as an EGX-400/600...

paolo8453
Bronze Member
Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: EGX-400/600 TS-400 Z motor lock

Post by paolo8453 » Thu Oct 16, 2014 12:03 pm

Kai Perry wrote:What is the temp where the machine is?

The operating environment is - Temperature: 5 to 40°C (41 to 104°F) humidity: 35 to 80 % (no condensation).

Anything out of this range would make the machine potentially fail.

Why though? What components are affected? That might help me pinpoint the issue.

Cheers

Paul
Hardware: TS-400 which seems to be the same as an EGX-400/600...

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Kai Perry
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Re: EGX-400/600 TS-400 Z motor lock

Post by Kai Perry » Thu Oct 16, 2014 2:23 pm

That just the machines spec, likely it's down to the power or main board.

The issue sound more like a problem with the spindle or motor, have you tried starting the process at a slow speed?
Kai Perry
Application Engineer
Roland DG (UK) Ltd
http://www.rolanddg.co.uk

paolo8453
Bronze Member
Posts: 96
Joined: Sat Feb 25, 2012 11:27 am

Re: EGX-400/600 TS-400 Z motor lock

Post by paolo8453 » Thu Oct 16, 2014 5:13 pm

Slow movements are fine. I can't control the speed when it's zeroing z though - it retracts full speed once it's zeroed.

It's not the spindle as it works fine even if that's removed. The motor? Why would it be affected only by quick movements and be remedied by application of heat?

It wont trigger a fault if I try and stop it going up by applying pressure with my hand - it pulls like train!

There's a rotary encoder built in to these AC servos. I suppose it could be related to that? Getting a SHINANO KENSHI
LA052-040E7N03 will be next to impossible though...
Hardware: TS-400 which seems to be the same as an EGX-400/600...

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