Z axis problem
Posted by sveno
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Z axis problem May 30, 2016 11:24AM |
Registered: 7 years ago Posts: 7 |
I have a problem with homing on the z axis. When I run the z axis in manual mode speed is as it should be but when I press Z home the speed is almost 0 and the two drives do not run parallell. I have Marlin firmware Mega 2560 R3 Ramps 1.4 and TMC2100 drivers. Switching drivers does not change any thing nor changing to another driver type. The other axis work as they should both in manual and in go home mode. Suggestions any one.
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Re: Z axis problem May 30, 2016 01:52PM |
Registered: 13 years ago Posts: 7,616 |
Two Z axis steppers on one stepper driver? Then it can't be the firmware at fault.
In case you have wired them in parallel, rewire them in series. Wiring in series guarantees the same torque on both steppers and gives more current ( = more torque), at the cost of maximum speed (which isn't that crucial on the Z axis).
In case you have wired them in parallel, rewire them in series. Wiring in series guarantees the same torque on both steppers and gives more current ( = more torque), at the cost of maximum speed (which isn't that crucial on the Z axis).
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Re: Z axis problem May 30, 2016 03:57PM |
Registered: 7 years ago Posts: 7 |
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Re: Z axis problem May 31, 2016 06:03AM |
Registered: 13 years ago Posts: 7,616 |
If both steppers are on the same stepper driver it can't be a firmware issue. That's physically impossible. Firmware sends only one step pulse out to the driver. Everything behind that can't be influenced by firmware.
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Re: Z axis problem May 31, 2016 05:23PM |
Registered: 7 years ago Posts: 7 |
Why do they run at "normal" speed and power when I run them manualy and at snails pace so slow and no power when I push they Z home button?
That is the problem if I was unclear first. Both z drives run the same manualy but at z home they are out of power and speed. That is the reason for out of synch.
That is the problem if I was unclear first. Both z drives run the same manualy but at z home they are out of power and speed. That is the reason for out of synch.
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Re: Z axis problem May 31, 2016 05:23PM |
Registered: 7 years ago Posts: 7 |
Why do they run at "normal" speed and power when I run them manualy and at snails pace so slow and no power when I push they Z home button?
That is the problem if I was unclear first. Both z drives run the same manualy but at z home they are out of power and speed. That is the reason for out of synch.
That is the problem if I was unclear first. Both z drives run the same manualy but at z home they are out of power and speed. That is the reason for out of synch.
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Re: Z axis problem June 01, 2016 05:39AM |
Registered: 9 years ago Posts: 978 |
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Re: Z axis problem June 01, 2016 02:29PM |
Registered: 7 years ago Posts: 7 |
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Re: Z axis problem June 03, 2016 10:58AM |
Registered: 7 years ago Posts: 7 |
After much searching thinking swearing etc I have now identified the problem. It is an unstable driver in relation to my computer/windows 10 32 bit. After reloading everything all worked fine for about 10 minute then it started to drop the connection to my ardunio. I have used different USB boards different ardunio different RAMPs all have the same problem. So my PC does NOT like Ardunio. I am now going back to Windows XP se if that is the fix.
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