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This is an old page when we were considering selling it to upgrade to a new machine. We have since retrofitted the machine with a new Centroid M400 / CNC Matters retrofit.

(clickable link above)

Atrump B5AC with Centroid M400AC control

I ordered this machine 12/01/03, it was delivered and setup on 12/02/03 and had run 4 prototype jobs by close of business on Wednesday 12/03/03. Machine was moved to a new facility 10/08/08.

I mainly do prototype jobs with quantities usually less than 10 pieces. We do the occasional production parts modification job usually always in plastic where we need to make some small modification to 500 o 5000 pieces. I’d say we do this kind of job 8 to 12 times a year and these jobs are always a brainless light duty operation.

We have enjoyed a very low cost of ownership with this machine. I have replaced the PC power supply 3 times, Replaced the PC motherboard 09/08/2010 and rebuilt the air over hydraulic pull stud release mechanism (new O-rings and seals), and replaced the Mitsubishi spindle inverter with a Delta unit on 09/08/11.

Machine runs well and still holds good tolerances and is very repeatable. The machine has not been run hard or abused.

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Atrump B5AC Centroid M400AC control, rigid tapping, programmable coolant nozzle, tool touch probe, digitizing software, rigid tapping. 4 axis AC servo amp wired for fourth axis. 1000 watt ac servos on all 3 axis. Option sheet shown below in another photo.

Specifications

Model  Atrump B5AC

Work Table     305mm x 1270mm (12" x 50")

Table T-slots (WxN)   18mm (0.71")x3

Table load max.           640kg (1400lbs)(center)

X-axis travel    850mm (33-1/2")

Y-axis travel    460mm (18)

Z-axis travel    485mm (19")

Spindle nose to table   110-595mm (4-5/16"-23-3/8")

Spindle center to column        480mm (18-7/8")

Spindle taper   BT [URL=http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=40]#40[/URL]  (CAT [URL=http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=40]#40[/URL] )

Spindle speed  60-6000R.P.M.

Spindle motor 7-1/2HP(*more)

3 Axes drive motor     DC or AC 1kw

Cutting feed    4M/min (1~160 ipm)

Rapid feed      10M/min (350 ipm)

ATC type        Armless Type

Tool change time (Tool to Tool)         12 sec

Max. tool diameter      Ø 100mm (Ø3-15/16")

Max. tool length          275mm (10-15/16")

Max. tool weight         7.5kgs (16 lbs)

Floor space (LxWxH) 270x180x215cm (106x71x85")

Weight (Approx.)        2650kgs (5800lbs)

Packed size (LxWxH) 180x200x230cm (71x79x90")

Positioning accuracy   ∂ 0.01mm (∂ 0.0004")

Repeatability accuracy            ∂ 0.005mm (∂ 0.0002")

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Click here to see current job setup and running on machine as of 03/2016  

Job 02/2016

Job 02/12/2016

Job 11/05/2015

Older Jobs

1

2

3 One of a few stainless jobs

4

5

You can see more parts machined on this machine and the YCI Supermax with centroid control by clicking here.

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One of the best accessories I have ever bought for this mail (and my personal machining center in my home shop) is the SpiderCool programmable coolant unit. This unit allows you to set a coolant position for each tool in the tool changer. You can just have a steady stream or a stream that cycles up and down the tool.

I eventually had to add a coolant filter to catch fine plastic particles that would eventually clog the laminar flow device inside the coolant nozzle. The first filter bag lasted over 10 years and I just replaced it a few weeks ago because I was too lazy to clean it again.

The loc-line shown in this photo is for compressed air on M07 and is being used on the job that is setup in the vise.

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16 station umbrella tool changer!

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For the most part the paint is still intact inside the enclosure. If it were given a thorough cleaning, it would show that it has had an easy life.

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03/16/16 3:44:20 PM

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Another big upgrade to this machine over stock was the addition of a standalone coolant tank instead of using the inside of the main casting as a coolant reservoir. I have only used Castrol HySol MB50 cutting fluid in this machine since new.

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After homing the machine to the limit switches, I set the work coordinate 11 at the home position and moved the machine to end of travel for each axis, this is the actual travel limits of the machine. I know the limit switches could be adjusted to get slightly more travels but I have never attempted it.

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SAMSUNG-SGH-I337
03/16/16 3:42:04 PM

Here is a list of all of the parameters that are turned on in the control.

The most notable are Rigid tapping, auto tool measure, digitizing and probing, Servo 4 drive, C Axis,

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03/16/16 3:42:08 PM

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Replaced the original Mitsubishi VFD with this 10HP Delta with Larger External braking units shown in the photo below.

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I mounted the braking units on a 2x8 piece of architectural aluminum channel to help with heat dissipation. When tapping lots of holes you can feel the heat rising up through the channel like a chimney!

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Programmable coolant unit installed on machine is worth its weight in gold! Once you have one of these you wont want to go back to the old way! No more coolant soaked shirts, no more coolant in your eyes as you try to manually adjust the loc-lines to get the coolant where you need it! Once you have a job setup and dialed n, you don’t have to baby sit the coolant or live with mediocre coolant placement trying to reach all of the tools!

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This is the control unit for the nozzle shown above.

You can read all about them on their web site:

http://www.spidercool.com

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In this image you can see I was cutting black Delrin taking very light cuts. After cutting enough of this the fine particles started getting sucked into the coolant pump and sent out the spider cool nozzle. Inside the nozzle, there is a laminar flow straightener that eventually gets clogged up with these small particles!

I installed a whole house filter that uses a basket filter from Mc Master Carr. There is a photo 2 images below. This solved the problem completely. I think I cleaned the bag filter about 3 times in 10 years. I just replaced the filter bag a few weeks ago because I was too lazy to clean it out by hand! Another good investment!

More photos and details on the SpiderCool can be seen by clicking here!

More photos and details on the Coolant Filter can be seen by clicking here!

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A couple years ago we were dinged on an inspection by our insurance company. In their infinite wisdom they made me install a lock on the door preventing movement of the machine while the door was open. They claimed that the doors were there to protect the operator form injury while the machine was in motion. No relief for the fact that you cannot setup the machine while the door is closed and locked….

So after they left, an interlock switch was installed to allow operation with the door open. I even had the custom PLC macro allow the machine to move at a snail’s pace while the door is open but it’s almost impossible to setup a job this way, it takes forever to move to position.

I fabricated and installed the interlock key switch bezel and made the mounting blocks for the actual locking mechanism. Atrump did the mechanical and electrical assembly of the actual lock. I worked with Centroid directly to implement the new PLC macro and interlock switch.

Now I have full un restricted movement with the interlock set to the off position, and I have a “Safe Mode when I have a production worker using the mill doing a production job!

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Recycled a discarded powder coated aluminum credit card printer cabinet and machined up this nifty Legend Plate for the interlock override switch!

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This should have been listed up higher!