On Fri, 2011-04-22 at 16:02 +0100, Kev James wrote: > Just got to test it. X-axis is working fine but I don't seem to be getting > any power to the y/z outputs. I have assigned amplifier enable to the three > enable pins for the three axes. I get about 1.5v across A/!A and B/!B for > the X axis, but 0 for the Y and Z. > > Does this sounds like a hardware problem to you? If so I will see if I can > find someone who knows about electronics to try and help me narrow this > down. > > Cheers, > KEv.
>From a brief search for HY-TB4DV-M I found this board is likely to be based on the TB6560AHQ: http://www.toshiba-components.com/motorcontrol/pdfs/TB6560AHQ_AFG_E_2003_20080407.pdf Short URL: http://alturl.com/gygw6 I started a couple of different replies, but they got too long. I think the crux of the problem is that the basic parts of the driver board are there but are near their performance limit. In these situations, the user will need to have a good understanding of how the board works to recognize were the problems might be and compensate for the faults. For a beginner, this can be a lot of extra work, or a good way to learn about electronics. If you just want to bolt together something that just works, consider not using this driver board. If you want to build and modify more CNC machines, you will need to learn all the details anyway and it's best to learn on something that is inexpensive. I would tend to start with the EMC2 parallel port and verify that the proper signals are created at the port, then look for these signals as they go through the driver board. This means that you will need to become familiar with most of what is in this link: http://www.linuxcnc.org/docview/html/hal_parallel_port.html These might help too: http://www.epanorama.net/circuits/parallel_output.html http://www.beyondlogic.org/spp/parallel.htm It is easy to damage a parallel port while experimenting, so I believe it's best to get a couple of PCI parallel port cards to play with so you don't burn up a motherboard port. Check these for more: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?NetMos and other parallel port cards here: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware Being comfortable with using HALscope and HALmeter will help. Check out the scope and meter sections of this link: http://linuxcnc.org/docs/html/hal_tutorial.html Instead of working with HAL from a terminal command line as covered in the above link, sometimes it's easier to copy a basic stepper configuration while in the EMC2 start screen and modify the .hal file to free up some parallel port pins and use them for experimenting, such as using the mist button to turn an LED on and off, or toggle a connected to the driver enable input on and off while checking the signal at the driver chips with a voltmeter. The above covers just a bit of what you'll need to know, so you will most likely need to come back here and ask more questions, but that is what the list is for. Also, the more specific a question is (one or two at a time), the easier it is to answer. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
