I revently assembled the k8200 and I have a slight problem with my controller board. First, it is missing one of the voltage adjustment screws. Second, the x-axis and y-axis trimming screws won’t adjust the voltage. The screws may be stripped. I am not sure, I can’t see them very well. The z-axis voltage is good and the motor works properly. Is there a way to just replace the screws or adjustment chips, or do I have to replace the entire board?
You can order at your local velleman dealer new stepper drivers
velleman.eu/products/view/?id=415800
The voltage adjustment screws are very (like crazy) small. I was struggling to get them to turn even with my quality set of Snap-on precision screwdrivers. I eventually went a bought one of these.
http://www.ebay.com.au/itm/201331363492?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Alternatively, a 00 Philips head screw driver also works well.
It’s unfortunate you are missing one of the screws though.
Is the printer still covered by the warranty (if the screw was missing out of the box?)
Or you could just buy some DVR8825 drivers off ebay. They are slightly better drivers, and very cheap.
Thank you for the responses. After doing some looking around, and finding out what the part was, I decided to just pickup these.
I order a 5 pack in case something else happened. These are a little better chip. I just have to get a #00 Philips screwdriver now.
If you were willing to buy new drivers, I would have upgraded to the DVR8825. Basically the same price, but finer step control (1/32 vs 1/16). There are reports (I can not confirm until my DVR8825’s arive) that these reduce noise and vibration of the printer during operation.
This is my first 3D printer, RepRap. I want to get it up and run in properly and print a few things. I am looking at upgrade the z-azis and nozzle at a later date to improve print quality. At that time I will probably upgrade the controller boards as well. For now, these will work. Thank you.
That is fair enough. Sorry I don’t want you to think I was lecturing.
The K8200 is my first foray into 3d printing also. Best of luck getting up and running. I have found the people on this forum to be very generous and forthcoming with information and advice.
I am very happy with my K8200. I am very much enjoying fine tuning and upgrading. And as an amateur maker, it is so handy to be able to create virtually any part (within reason) for my projects.
Kind regards.
Justin.
I have solved the board problem and another one came up. After a couple of prints, the y-axis motor won’t turn. With no current, motor actually remove from the printer, I cannot get the motor to spin freely. Is this a bad motor? My other motors work fine. It is as if the magnet is still energized. I have cut the wires and removed it completely and the problem persists. Do I nee a new motor or can this one be fixed?
In repetier host, under the manual control tab, there is a button to disengage the motors so you can move them freely by hand (the button looks like a little motor, with a slash through it)
If that is not successful, unplug the motor plug from the control board, if motor still does not turn, I’d say you have a bad motor.
The motor is bad. Any suggestions on replacements? Factory or otherwise…
Sorry for the late reply. I missed your reply post.
If you are still seeking a solution.
Contact Velleman first to see if the printer is still covered by a warranty. They will most likely send you a replacement if it is.
if not
The stepper motors are readily available online. I purchased a set of 5 Nema 17 (.59 N.m) motors on ebay for $85AUD delivered.
ebay.com.au/itm/171828613083 … EBIDX%3AIT
These are as good (if not better) quality than the ones supplied in the Velleman kit. Check availability in your country. Just be sure to purchase a motor of the correct minimum torque. I am unsure what the Velleman motors are rated at.
Perhaps someone else can answer this?