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kcsl
1 post
Popping In
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25-03-2008 10:26
Well, after a 10 week wait, my profiler arrived, tho I'm having my unfair share of problems.
Some of the black machine bolts that were supplied were faulty. Instead of having a thread on them, they have been cut with just rings. The outcome is that they "look" fine, but they wont screw in, no matter how hard you try. Took me a while to figure out that one. Rapid electronics in the UK stock replacements bolts for those that need to know.
Then the Z-Axis stepper wouldn't turn. The tollerances are way too tight here and a flexible (or better quality) coupling is required. I've got a temporary solution by loosening the top two black bolts 50% of the way out, and fitting a rubber spacer to each but it's not a good permanent solution.
However, now I have a problem with the controller.
When the profiler is powered up, all 3 axis move to their home position and using a comms analyser I can see traffic between the PC and the profiler but the software always reports that the controller cannot be found; and it does this on 3 different PCs all using their own in-built serial ports (no USB to Serial converters etc). i've also checked the cable they supplied and that seems fine.
So, after sending an Email to them, and them telling me to basically check everything I told them I checked in the Email, I have to return the controller back to them. Another 2 weeks down the drain probably.
One question I have tho, is the steppers are making a hissing sound, like escaping gas. Power the profiller up, all the 3 axis move to their home position and then stop, but you can hear this hissing sound... is this normal ??
I'll report back what happens.
Joe
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BoeingBrown
335 posts
Power User
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25-03-2008 10:37
Hi Joe, This question was also raised in the Dutch Profiler forum. http://www.elektor.nl/forum/forum/actuele-projecten/zoemende-motor.338380.lynkx Yes, we all hear some noise when the motors are under electric tension. The way people describe it is quite different  but essentially it's the same. Look also in the difference linguage Profiler forums here ! Lots of information. Hessel
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binraker
43 posts
Occasional Visitor
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25-03-2008 18:55
Only a 10 week wait? mine arrived last week after 18 weeks!!
As for z axis problems, I had the same problem only worse, the lead screw was so tight that the motor couldn't turn it. I fixed both problems by running in the lead screw by removing the motor and driving the lead screw up and down a few dozen times with the aid of a cordless drill. This seamed to fix the problem. Although this is one reason I'm not entirely convinced about this nut with non-adjustable backlash.
I too get the same hissing sound but I have been rebuilding a boxford duet cnc machine recently and this does the same thing so i just ignored it.
hope you get it working in the end.
P
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ravilez
10 posts
Popping In
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09-05-2008 16:43
Hi
I am still waiting for a replacement coupling for the Z-axis from Colinbus. The coupling's bore was off by ~0.3mm at one end which impeded homing (maximum separation between zero-backlask nut and the splindle) when all the bearings were adjusted for a very tight contact with the guiding rails. The stepper's torque was just not able to lift the housing all the way. One other solution is to file a larger hole, but it does not remove the problem of the wobble. CNCPlus.de has suitable Oldham couplings for a reasonable price and they sell other useful material to make up for the 25 euro delivery charge.
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