Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On Fanuc drives you need to be careful as bad or worn motor cable insulation can easily take out a Fanuc drive. :-( Dave On 2/26/2016 5:07 PM, Todd Zuercher wrote: > I had to replace all of the servo power cables on a Fanuc 0i controlled > gantry router (only 10 years old). The insulation

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On 26 February 2016 at 21:31, Forum Deswysen wrote: > I have another problem: > > https://drive.google.com/open?id=0B5hmBjm5ot8NaTRkSlRWZVc4d2M > > I have a difference between 0.2-0.3 mm !!! That sounds about right for 10 degrees of play in the screw. The question now

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

I had to replace all of the servo power cables on a Fanuc 0i controlled gantry router (only 10 years old). The insulation had hardened from oil exposure, was badly cracked, and some of the conductors were broken. Made for some rather erratic servo performance. - Original Message -

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

I just replaced the power cables, not the encoder cables, and I didn't use shielded cable, I used the same stuff that is pictured. I used 12/4 AWG. Rick Original Message Subject: Re: [Emc-users] Stake in ball screw Cincinnati Arrow From: "Forum Deswysen"

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

For Rick : A problem identified, thank you Rick. I will replace cables. You changed the power and encoder? Given the color and the type of cable, I do not think this is the original cable. For power, did you use shielded cable? What section did you use Andy: I have another problem:

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

You are seeing pretty much exactly the same issues that I was having with both of my machines, you have the A2100 control, and that was the fault that I was getting on my machine, before I replaced the cables. That is definitely physical damage on the X axis cable, but the damage I am talking

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

For Rick : Your reply came at once: I just found a fault in the power cable of the Y axis https://drive.google.com/open?id=0B5hmBjm5ot8NLXFFTXBMbmVuWVk For Andy : I will try now 2016-02-26 20:04 GMT+01:00 andy pugh : > On 26 February 2016 at 18:46, Forum Deswysen

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

I asked for your help because I had an axis error "CR_AXES_RDY" that caused the shutdown of the machine: https://drive.google.com/open?id=0B5hmBjm5ot8NSFlVNFZ6OFFpOGc Before we heard creaking on the screw axis Z ??? Therefore first I thought of a default of the screw. It's not that. The servo

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On 26 February 2016 at 18:46, Forum Deswysen wrote: > I'm going to do tests with a comparator in the motor spindle. > Perfect, I no difference. > So all is well with the ball screw !!! I don't think you can necessarily say that with that test. You would need to try to

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

What error are you getting on the control, what is the machine actually doing? I have the Sabre 750 which is a 1995 and has the A2100 control, and we also have a Lancer 1250 with the 850SX control, which is from 1996, the Sabre has the Kollmorgen drive package, and the Lancer has the Red Cap

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

I'm going to do tests with a comparator in the motor spindle. Perfect, I no difference. So all is well with the ball screw !!! https://drive.google.com/open?id=0B5hmBjm5ot8NNGdkYmo4WHRSSXM https://drive.google.com/open?id=0B5hmBjm5ot8NanpxT1hzaGxsYTg

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

With about 95% certainty, all the milacron, lathes and machining centers, the ball nuts all sit in and bolt to the mounting block ( we have at least a dozen Cincinnati Milacron machines, mix of lathes and mills, from 1978 to 1996, and they all have the same configuration, and I have worked on

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On 02/26/2016 08:00 AM, Forum Deswysen wrote: > https://drive.google.com/open?id=0B5hmBjm5ot8NSDhCTmpsWkk3aVU > > This 3rd picture seems to show you indicating you can rock the screw forward/backward by 10 degrees. This would seem to indicate wear and looseness in the ballnut, or possibly in

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

No we have never had any issues like this, that is why I would be looking at the mounting of the physical ball nut and mounting block, It doesn't appear to have any taper pins, just 4 bolts to attach the mounting block the the casting, and 4 bolts to mount the cartridge into the mounting

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

For everyone, Thank you I'll watch carefully. For Rick Lair, Have you ever had this problem with your Sabre 750 ? 2016-02-26 16:03 GMT+01:00 andy pugh : > On 26 February 2016 at 14:00, Forum Deswysen > wrote: > > *Can someone** tell me if this

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On 26 February 2016 at 14:00, Forum Deswysen wrote: > *Can someone** tell me if this nut **is adjustable ???* It doesn't look likely to be. The first place I would be looking would be at the screw thrust bearings, though. -- atp If you can't fix it, you don't own it.

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

If this is any help, here is a link to a copy of our Sabre 750 Z axis ball screw layout, your machine looks identical to our machine. https://app.box.com/s/tt0favgpkqrvd0e6uisglg0p6jutdoh4 Rick On 2/26/2016 9:00 AM, Forum Deswysen wrote: > Hello Andy, > > Thank you for this additional

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

Is the ball nut mounting block solidly attached to the back of the main spindle casting? There are probably 4-6 10mm or 12mm bolts, and 2 taper pins that attach the mounting block to the spindle casting, maybe the pins are sheared and the screws loose. Unless the mounting block is part of the

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

Hello Andy, Thank you for this additional information. *Can someone** tell me if this nut **is adjustable ???* Some pictures of the problem: To have no more weight on the screw, the head of the machine is placed on its transport support

Re: [Emc-users] Stake in ball screw Cincinnati Arrow

On 26 February 2016 at 06:02, Forum Deswysen wrote: > Yes that's it. Don't ignore the possibility that the backlash/ slack might be in the ballscrew bearings. Depending on the style of the ball-nut, it might be possible to adjust the backlash. Isel make adjustable