Daryl, you aren't being lazy, you're enhancing your efficiency! That's you doing your 5S part to help the company... Gotta love screw adjustable gibs, make everything so much easier. A number of our machines (Toyoda's come to mind) use ground shims to set the gibs, arrrggghhh PITA to adjust, - and a nice trap for young players...
I like to tighten all of the gibs. It is a feel thing, but if you have a load monitor on the controller, you can use that. Write down the loads in both directions and check it after adjusting the gibs. The reason I don't back the z-axis gibs out a 1/4 turn on this machine is because they are pushing a 2-1/2" x 14" long drill. The x-axis gib, I snug them then back them off a 1/4 turn. To access the load monitor on a Fanuc 16 or newer, hit the position hard key, then the right expansion arrow, and you will see a "monitor" soft key on the left hand side. Okuma states to not exceed 35% load, but I like to see about 10 to 12 percent load after a gib adjustment. X-axis will be different load going up as opposed to going down due to lifting the weight of the turret and no counter-ballance. I like to see 10% going down and 30/40 going up on x-axis.
Great info, Daryl. So to adjust the gibs, you're just tightening till you feel snug. I assume this is a very touchy feely sort of adjustment. I've torn my whole takisawa ts-15 down to nuts and bolts before, but I've never readjusted the gibs. I recently discovered some slop in the X slide and not sure if it's gibs or ball screws. But feel gibs should be the first thing to address. I am assuming when I get in there, I won't find much in the way of "snugging room", so how should I determine how much to tighten the gib screws? And which ones? All of them? Keepers and positive?
We've got an old Takasawa at work, I think it's a TS series, been a really good machine for the past 30 years or so. Unfortunately, I've never had to deal with adjusting the gibs on it, so I can't provide any specifics. Be aware that not all gibs are screw adjustable, some use shims that have to be ground down or other methods. You have to keep in mind that the ways tend to be a lot more worn close to the spindle/centerline where it spends most of it's time. If you adjust the gibs in the worn area, it will start to bind as you get closer to reference position (assuming that's set with the axis' at their positive end of travel). Depending on the amount of wear you may not be able to get all the slop out of it without binding at the ends. Most controls have some way of monitoring the load on any given axis. When I'm adjusting gibs on clapped-out machines I watch the load monitor and tighten them up as tight as I can go without causing too much load with the machine referenced. You don't want the axis sitting with a 90% load when you home out the machine, you just have to compromise the best you can, or learn how to scrape ways back in!
Daryl, you aren't being lazy, you're enhancing your efficiency! That's you doing your 5S part to help the company...
Gotta love screw adjustable gibs, make everything so much easier. A number of our machines (Toyoda's come to mind) use ground shims to set the gibs, arrrggghhh PITA to adjust, - and a nice trap for young players...
Thanks for your comment Marc!
God bless you Daryl for these videos!❤
Tight spaces, I see a lot of walking around the machine just to get to them. Thanks for sharing. Charles
I like to tighten all of the gibs. It is a feel thing, but if you have a load monitor on the controller, you can use that. Write down the loads in both directions and check it after adjusting the gibs. The reason I don't back the z-axis gibs out a 1/4 turn on this machine is because they are pushing a 2-1/2" x 14" long drill. The x-axis gib, I snug them then back them off a 1/4 turn.
To access the load monitor on a Fanuc 16 or newer, hit the position hard key, then the right expansion arrow, and you will see a "monitor" soft key on the left hand side. Okuma states to not exceed 35% load, but I like to see about 10 to 12 percent load after a gib adjustment. X-axis will be different load going up as opposed to going down due to lifting the weight of the turret and no counter-ballance. I like to see 10% going down and 30/40 going up on x-axis.
@@OtherBrotherDarylSmith Awesome idea.
Great info, Daryl. So to adjust the gibs, you're just tightening till you feel snug. I assume this is a very touchy feely sort of adjustment. I've torn my whole takisawa ts-15 down to nuts and bolts before, but I've never readjusted the gibs. I recently discovered some slop in the X slide and not sure if it's gibs or ball screws. But feel gibs should be the first thing to address. I am assuming when I get in there, I won't find much in the way of "snugging room", so how should I determine how much to tighten the gib screws? And which ones? All of them? Keepers and positive?
We've got an old Takasawa at work, I think it's a TS series, been a really good machine for the past 30 years or so. Unfortunately, I've never had to deal with adjusting the gibs on it, so I can't provide any specifics. Be aware that not all gibs are screw adjustable, some use shims that have to be ground down or other methods. You have to keep in mind that the ways tend to be a lot more worn close to the spindle/centerline where it spends most of it's time. If you adjust the gibs in the worn area, it will start to bind as you get closer to reference position (assuming that's set with the axis' at their positive end of travel). Depending on the amount of wear you may not be able to get all the slop out of it without binding at the ends. Most controls have some way of monitoring the load on any given axis. When I'm adjusting gibs on clapped-out machines I watch the load monitor and tighten them up as tight as I can go without causing too much load with the machine referenced. You don't want the axis sitting with a 90% load when you home out the machine, you just have to compromise the best you can, or learn how to scrape ways back in!