Grizsly 8689 tram
Posted by
ebiz_59
on 2010-12-04 07:03:21 UTC
Well the recent videos on Tormach attachments have created some questions, cuz I have recently acquired an 8689 that someone else CNC'd with ACMEs, and I'm pretty sure that I could not produce the attachments shown in the videos, due to alignment and backlash. Here are a couple questions that occur to me...
1 - how do you tram and maintain tram of these units? It looks to me like there should be a turnbuckle from an outrigger leg up to the column that would help adjust and maintain tram.
2- My unit has 276 oz-in steppers on X n Y and when I tighten the gibs enough to take the slop out of those tables, the steppers miss steps. Do I just need higher torque steppers, or ??
3 - The drill chuck holder in the video looks pretty interesting, although it looks like it could be subject to ongoing axis alignment errors. But maybe there is a clever way to align those axises?? I know boring the final holes would help with this, but we are still subject misalignments, altho they would result in a tapered hole, not one offset.
4 - What other attachments have folks found useful for their CNC'd mini mills.
thanks, Chuck
1 - how do you tram and maintain tram of these units? It looks to me like there should be a turnbuckle from an outrigger leg up to the column that would help adjust and maintain tram.
2- My unit has 276 oz-in steppers on X n Y and when I tighten the gibs enough to take the slop out of those tables, the steppers miss steps. Do I just need higher torque steppers, or ??
3 - The drill chuck holder in the video looks pretty interesting, although it looks like it could be subject to ongoing axis alignment errors. But maybe there is a clever way to align those axises?? I know boring the final holes would help with this, but we are still subject misalignments, altho they would result in a tapered hole, not one offset.
4 - What other attachments have folks found useful for their CNC'd mini mills.
thanks, Chuck