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Author Topic: Just got a lathe to retrofit  (Read 176984 times)

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Offline Hood

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Re: Just got a lathe to retrofit
« Reply #170 on: January 04, 2009, 08:40:24 PM »
Nope I have an cranked  style threading tool, unfortunately I cant put normal  tools upside down in the turret due to the wedge clamping style of it. So yes I run the spindle the other way but tool is still in the turret. I have a normal tool for the turret  if I want to do left handers :)
Hood

Offline N4NV

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Re: Just got a lathe to retrofit
« Reply #171 on: January 04, 2009, 08:49:35 PM »
Maybe I missed something.  I just read through the installation manual for the Allen Bradley Ultra 3000 drive and I don't see how you are controlling them from Mach.  What is your setup for controlling the drives?

Vince

Offline Hood

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Re: Just got a lathe to retrofit
« Reply #172 on: January 04, 2009, 08:55:56 PM »
They accept analogue(both Torque or Velocity mode)  and also  Follower mode which includes step/dir, step up/ step Down or Encoder.
I use in follower (Step/Dir) mode but may switch to Follower (Encoder ) as the SS can now do that however at the moment I am not sure if there are any benefits as it runs great with Step/Dir.

Hood

Offline N4NV

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Re: Just got a lathe to retrofit
« Reply #173 on: January 04, 2009, 09:06:25 PM »
So you wire your step and direction wires from your BOB to CN1 pins 4 and 6?  It's that simple?

Vince

Offline Chaoticone

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Re: Just got a lathe to retrofit
« Reply #174 on: January 04, 2009, 09:10:33 PM »
A little more to it than that, but it isn't bad.

Brett
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Offline Hood

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Re: Just got a lathe to retrofit
« Reply #175 on: January 04, 2009, 09:13:47 PM »
Yes but I actually have differential inputs as the BOB I have  puts the step dir out as that if I want, so I use pins 4,5,6,7 on CN1. You can however just connect them up single ended.
Hood

Offline Hood

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Re: Just got a lathe to retrofit
« Reply #176 on: January 04, 2009, 09:19:48 PM »
As Brett says you can do all sorts of other things and can have up to 8 digital inputs, 4 digital outputs, 2 analogue I/O and then the relay output as well. These outputs can be configured to almost any function you could think of :D
 Very nice drives and very configurable especially the indexing ones as they allow you to do a gated Index homing which is extremely accurate :) Also they would be excellent for toolchangers as they can index to 64 preset positions with only 6 inputs.

Hood

Offline N4NV

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Re: Just got a lathe to retrofit
« Reply #177 on: January 04, 2009, 09:20:31 PM »
So what BOB had differential outputs for step and direction?

Vince

Offline Hood

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Re: Just got a lathe to retrofit
« Reply #178 on: January 04, 2009, 09:24:19 PM »
CNC Building Blocks but afraid they are not made any more. Would think it easy enough to do it yourself with either a differential chip thingy, sorry getting late and brain has stopped remebering the proper terms :) or even a ready made one of the type that US Digital use for their encoders to turn them into differential encoders.
Hood

Offline zarzul

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Re: Just got a lathe to retrofit
« Reply #179 on: January 05, 2009, 05:08:50 PM »
I can get you a chip number if you need it still.   I had to do the differential driver for my Kollomorgen driver also.  It is fairly simple,  step & direction in to differential step/dir out.