You didnt mention what type of limit switches you're using or how your spindle works. The Y axis itself shouldn't be under any special stress while cutting but the spindle generally takes a hard hit as soon as a tool enters the cut. Is the spindle motor powered by the same power supply your switches are on? Supply could be dropping low. Is the machine not ridgid and vibration tripping the switches?
On Tue, Jul 21, 2020, 8:54 AM Mason Millner <[email protected]> wrote: > Hi All, > > We are developing a 4-axis CNC to mill bamboo poles and are currently > running tests in just three axis (x, y, z). We can dry-run g-code files > successfully, however we receive limit switch errors (primarily on joint 1) > when we begin cutting material. We suspect that the error is occuring in > the y-axis and that possibly our drivers are causing a problem (either they > are too small or not tuned adequately).. It is difficult to tell what is > going on and how the machine is configured from the information given. > > We have the z-axis running on the long x-axis, running on two shorter > dual y-axes. > > The axis shaft is a ½” (12.7mm) , also the motor shaft is ¼” (6.35mm). we > are using polyurethane insert couplers (these have regularly been coming > loose though). > > The motors are NEMA 23s with 3A rating/phase controlled by Pololu > TB67S249FTG drivers on a Cramps 2.2 cape on the Beaglebone Black. The > drivers have a current limit of 1.6A and are further limited to %90 for > safety. The Current limit for the board and drivers are defiantly a bottle > neck, but the motors have enough power to operate. [Could this be the > problem?] > > Any help or recommendations would be greatly appreciated. If more > information is needed please let me know. I'm fairly new to the machine > development side of this project. Thanks. > > -- > website: http://www.machinekit.io blog: http://blog.machinekit.io github: > https://github.com/machinekit > --- > You received this message because you are subscribed to the Google Groups > "Machinekit" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/machinekit/790379d8-160b-4fed-9fa2-d03cbe160926n%40googlegroups.com > <https://groups.google.com/d/msgid/machinekit/790379d8-160b-4fed-9fa2-d03cbe160926n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/CA%2BQ02MOw74vWGQi7CGqXEk_Eu9YpxCq8_xQUi2CC4SPJSOFhPA%40mail.gmail.com.
