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Z axis stop turn.

Assembly and Maintenance

Letzter Beitrag von Michael Vor 7 Jahren

9 Beiträge

2 Benutzer

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Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

The Z axis stoped turning suddenly.
My first thought was that any screw has loosened on the axel, but no.
I´m using UCCNC and when I "quick jog" shift+jog it turn for some reason.
Could it depend on any of the three cables that have gone off?

/Mika+

Stepcraft M.1000 + HIWIN Ball Screw + Semi-Closed Loop System + MM-1000 DI + Automatic Tool Changer + 2 Rows Tool Magazine Pneumatic Lifting + Engraving Laser DL445 + 4th Axis + Aluminum T-slot table + 3D Touch Probe + UCR201 + UCCNC + VCarve Pro + Cut3D + CorelDraw 2018 + Autodesk Inventor

Veröffentlicht : 25/05/2017 8:44 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

This is a video of what happening.

https://www.youtube.com/watch?v=rD02LWfB8r0

/Mika+

Veröffentlicht : 25/05/2017 11:50 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

The motor has no power, and I can stop it with my fingers without any problems.

No one has any idea what it might be wrong ???

/Mika+

Veröffentlicht : 28/05/2017 9:07 am

Peter Harrison

(@peterg1000)

Beiträge: 389

Reputable Member

Hi Mikath,

It looks very much as though only one of the two stepper coils is being driven. Three possibilities for this situstion :-

1) Fractured wire or loose connection in the wiring loom. (Most likely)

2) Open circuit winding inside stepper motor. (Not very likely - low resistance and thick wire)

3) Faulty stepper driver chip. (Unlikely for only one channel to fail - usually all or nothing)

Given that it is likely to be a fractured wire, I guess you will have hours of fun unwiring the gantry. 👿

Peter

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

Veröffentlicht : 28/05/2017 12:34 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

Thanks for your reply.
Initially, I'll try to change the X or Y axis to Z to see that there is no error on the PCB.

My fear is to rewire the gantry... 🙁

/Mika+

Veröffentlicht : 28/05/2017 4:24 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

One other thing I noticed is that the motor has a very high frequency of noise, the other motorss are completely silent.

/Mika+

Veröffentlicht : 28/05/2017 4:33 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

Now I have changed the X motor to Z on the PCB and it work like a charm.
I think it´s a fractured wire.

/Mika+

Veröffentlicht : 28/05/2017 11:16 pm

Peter Harrison

(@peterg1000)

Beiträge: 389

Reputable Member

Hi Mika,

Glad you've probably found the problem.

Don't envy you having to unwire the gantry to find the culprit. Good luck!

Peter.

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

Veröffentlicht : 28/05/2017 11:42 pm

Michael

(@mikath)

Beiträge: 59

Trusted Member

Themenstarter

I cut the cables and replaced with new ones and now all the axis work.
It does not look so nice at the moment, but I can fix it when I have new parts.

/Mika+

Veröffentlicht : 31/05/2017 5:29 pm