Author Topic: Belt stuck in Aluminium Profile  (Read 1678 times)

Nosferatu

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Belt stuck in Aluminium Profile
« on: April 18, 2017, 09:23:24 AM »
Hi,

i have a small problem with my A5 EleksMaker. The belt from one of the two X-Axes stuck in the score of the Aluminium Profile, where the rollers are rolling over. This causes problem on moving the portal (loosing steps).  On the other Profile it fits smoothly into it.
Is there any way to make it smoother ? Sanding the Aluminium Profile ?

Cheers
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)

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Re: Belt stuck in Aluminium Profile
« Reply #1 on: April 18, 2017, 09:46:52 AM »
Can we see a photo of what this looks like?
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Nosferatu

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Re: Belt stuck in Aluminium Profile
« Reply #2 on: April 18, 2017, 10:39:46 AM »
Hi,

attached you find a picture of the profile. The belt stucks on the edge, when it is liftet out with the pulley of the profile.

Cu
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)

Zax

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Re: Belt stuck in Aluminium Profile
« Reply #3 on: April 18, 2017, 11:21:59 AM »
Is it the belt that's a little too wide or the channel that isn't formed correctly? Either would be simple to correct, or you could order some slightly narrower belts.

Nosferatu

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Re: Belt stuck in Aluminium Profile
« Reply #4 on: April 18, 2017, 04:51:42 PM »
I don't know if the belt or the channel is the cause. Tomorrow i will disassemble that part of the machine and measure the width of the channel each cm to see, if there are different distances.
If that is the cause, what do you recommend how to correct that ?
At least i would measure the belt to see if there are some different in the wide. What kind and type of belt should i order then ?

Thanks for your support.
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)

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wild.bill

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Re: Belt stuck in Aluminium Profile
« Reply #6 on: April 18, 2017, 06:19:46 PM »
I will jump in because I have seen this when I extended my first laser cutter.

There are a number of different companies that make 2020 rails and they are not all exactly the same size, and even the face of the opening is different on some. The maker of your kit might have bought some stock from a new source not realizing that the G2 belt would not fit.

What I did when I had the problem, and I am still using these rails today, is take the rails off the machine and use a good quality, long, fine file and open the channel up until the belt would work. I think I opened them up to 5.3mm.

It was a slow process and I adjusted the face of the rails be be the proper angle for the wheels that I was using but when I finished a had a smooth working machine. Short of buying new 2020 rails of the proper size this is the only option that I know of.
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Nosferatu

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Re: Belt stuck in Aluminium Profile
« Reply #7 on: April 19, 2017, 01:26:29 AM »
I have found the cause of my problems:
The channels are 6.23mm wide on each profile - that looks good. But the belt differs in the width from around 6.07mm to 6.56mm. That might be the problem.
I will order new belts today and hope, that will solve this.

Thanks
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)

Stonemull

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Re: Belt stuck in Aluminium Profile
« Reply #8 on: April 19, 2017, 03:19:46 AM »
Mine is probably the same, belt is tight on parts of the beam, works fine though and I think the belt will wear down.
Have you set the motor currents ?
They are very low standard.
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wild.bill

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Re: Belt stuck in Aluminium Profile
« Reply #9 on: April 19, 2017, 04:43:36 AM »
I have found the cause of my problems:
The channels are 6.23mm wide on each profile - that looks good. But the belt differs in the width from around 6.07mm to 6.56mm. That might be the problem.
I will order new belts today and hope, that will solve this.

Thanks
Nos!

At 6.23 you have the proper channel width, the channel that I had problems with was 5.4mm. Buy a good quality belt and you should be fine.

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Nosferatu

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Re: Belt stuck in Aluminium Profile
« Reply #10 on: April 19, 2017, 04:57:54 AM »
At 6.23 you have the proper channel width, the channel that I had problems with was 5.4mm. Buy a good quality belt and you should be fine.

A new belt from a nearby dealer (germany) is ordered, and should be delivered tomorrow. Then we will see :)

Have you set the motor currents ?

No, i have not adjusted anything on the motor drivers.


Cheers
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)

Stonemull

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Re: Belt stuck in Aluminium Profile
« Reply #11 on: April 19, 2017, 06:14:07 AM »
You can easily double the driver current with zero problems, no heat.
That allows double the motor torque and speed, it is the first thing to look at with missed steps.
Mine was ok but easily missed steps till increased. Not measured it yet even, just turned both both pots about the equivalent of 1 hour on a clock face, 1/12 of a turn..
Then keep an eye on driver temperature and motor temperature just for the next hour,  I cannot feel any heat at all yet these drivers will happily work with a heatsink.

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Nosferatu

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Re: Belt stuck in Aluminium Profile
« Reply #12 on: April 20, 2017, 09:09:41 AM »
The new belts arrived today. Now the axes are running very smoothly,
It looks very promising.

Cheers
Nos!
-- EleksMaker A5 - 2500mW with T2-Laser (Laserweb3/ bCNC)