On Thu, 2012-03-01 at 20:33 +0000, Alan wrote: > Kirk > > > > It looks like the motor driver is an SCR type speed controller like the > > KBIC controllers. > > http://www.wallacecompany.com/machine_shop/kbic/ > > > Not exactly a KBIC board but very very similar. I looked at the manual > online and all the inputs to board corresponded to my pcb. But unlike > manual schematic there are no fuses placed next to board. Still it looks > like the same controller. > > > If the motor checks out okay, the speed controller may be the problem. > I ran the motor from a variable voltage lab bench ps I have. It only > puts out 20v dc at max, but that turned the motor ok but slowly and the > speed varied with voltage. Also at this speed motor was drawing a very > small current. So I am now assuming that the fault is not with the motor.
For the short term you may be able to use a light dimmer or power tool speed controller. http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?productId=202803522 or replace the controller: http://www.ebay.com/itm/190646759537 > Having said that I am still leaning towards the 3phase option. I quite > like the idea of the control box not being on the mill head and would > prefer to place controller on the wall near to the mill and then control > it from a remote pendant. Just about any controller can be mounted away from the machine. The speed controller or VFD can be controlled with three parallel port pins (run/stop, direction, pwm/speed). Then any remote or pendant could be used to tell LinuxCNC how to control the speed controller. USB game pendants seem to be popular. http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_Remote_Pendant > Thanks also for the info on vfd's. I have a cheap one controlling a > machine I made. I need to buy a more expensive one to handle the serial > / modbus connection. Having read the manual, I know that on the vfd I > have I would have to keep manually changing input mode on the vfd to > switch between pendant and serial input. I was hoping that I could do > this via an external switch or something similar on a different model. The three parallel port pin setup can allow you to do normal spindle operations. Modbus just allows you to monitor voltage, current, alarms and such, which really are not required for making parts. Two of the eight VFD's I have, have Modbus, the others use the parallel port pins or pins from an FPGA signal generator (allows higher resolution for the PWM speed signal). It would be easy to have a three pole switch that switches between the parallel port pins and a panel with two switches and a potentiometer. Micheal put a feature in his Modbus VF-S11 Modbus driver that writes to a register as LinuxCNC exits, so before and after LinuxCNC comes up, the VFD is in manual mode. My MVX and SJ200 VFD's have this feature too, so my guess is that most any Modbus VFD will have this. I sense that you have the budget and desire for a more sophisticated system, but I'm thinking it could be inexpensive to get your CNC back in service, then explore the options and do the upgrade at your leisure. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
