Microrouter v3 with undocumented modifications.
Posted: Sat 16 Mar , 2024 2:50 am
I'm trying to get a microrouter V3 up and running and having a spot of bother. The machine was built in May 2001 but has obviously been upgraded to the USB nextmove, and the "door drawings" have an updated set of 3A steppers, vacuum pump and Sprint 1200. How can I tell the difference between the Sprint 800 and the 1200 spindle board?
Things were going well to begin with and the nextmove connected and the motors pulled in once e-stop was reset. Things went South as soon as I clicked on "HOME", the z-motor squealed for a second or two and then silence, followed by that unmistakable smell of burning.
I've taken it apart and started probing. The z-axis L298 has a big hole in it, one of the catch diodes to ground was a dead short, the 6.3A PCB fuse was taken out and the L297 has a suspicious line running across it that looks like a package crack. I need to order some new parts and possibly replace the bridge rectifier while I'm at it. I'm sure that at least one of the other L298's has been replaced in the past too. I've had a look at the steppers and X and Y are the usual Sanyo Denki 2A types but the Z is a 3A/ph MAE HS200-2221 stepper (pictured). Can anyone confirm what stepper should be fitted to the z axis?
I'm wondering if the school that had this mixed up the controllers and this should have been a pro version or if the stepper failed, the wrong one was fitted. Having removed the faulty parts, I'm wondering if I should "side-step" the issue and use a DM542 or 556 and a fused 24V power supply and pick off GND,enable, step and dir from the nextmove for channel 2 and drive the stepper from that.
Any suggestions most welcome.
Gillian
Things were going well to begin with and the nextmove connected and the motors pulled in once e-stop was reset. Things went South as soon as I clicked on "HOME", the z-motor squealed for a second or two and then silence, followed by that unmistakable smell of burning.
I've taken it apart and started probing. The z-axis L298 has a big hole in it, one of the catch diodes to ground was a dead short, the 6.3A PCB fuse was taken out and the L297 has a suspicious line running across it that looks like a package crack. I need to order some new parts and possibly replace the bridge rectifier while I'm at it. I'm sure that at least one of the other L298's has been replaced in the past too. I've had a look at the steppers and X and Y are the usual Sanyo Denki 2A types but the Z is a 3A/ph MAE HS200-2221 stepper (pictured). Can anyone confirm what stepper should be fitted to the z axis?
I'm wondering if the school that had this mixed up the controllers and this should have been a pro version or if the stepper failed, the wrong one was fitted. Having removed the faulty parts, I'm wondering if I should "side-step" the issue and use a DM542 or 556 and a fused 24V power supply and pick off GND,enable, step and dir from the nextmove for channel 2 and drive the stepper from that.
Any suggestions most welcome.
Gillian