Acceleration parameters

those values determine the acceleration of your cmm, if they are set low (zero) then your acceleration will be extremely slow if not null. try tuning up the values to an acceleration that seems acceptable. i don't have a vintage minstral, we primarily use B&S advantages but we use accel values of approx 300 as a standard value here.

Our Mistral 7-7-5 was built and installed in 2000 also.
Ours is set for 175, 175, 175.
I've never changed them and I've been the primary user since day one.

Look at the movespeed / touchspeed in your programs too.

I would also be concerned as to how and who changed the accellerations.

mines 175,175,175 also.

We too have had issues with speed on our Global. Its one of the fastest machines B&S makes but when the tech looked at our accel settings, we too found them at 175 across the board. Found out the max acceleration rating for this machine was around 1500. Machine moves MUCH better now.

how can i check what mine should be? in-case it can be sped up?

We too have had issues with speed on our Global. Its one of the fastest machines B&S makes but when the tech looked at our accel settings, we too found them at 175 across the board. Found out the max acceleration rating for this machine was around 1500. Machine moves MUCH better now.

According to every quote I have received (Sept 2010 thru Feb 2012), the 5.X.X thru 9.X.X Global Advantages have a maximum 3D speed of 866mm/s, and a maximum 3D acceleration of 4300mm/s2. Basically, this means maximum speed for each axis is 500mm/s, and maximum acceleration is 2500mm/s2. The difference between 1500mm/s2 and 2500mm/s2 is not going to be very noticeable, you'll just get to your max speed in a slightly smaller fraction of a second.

Also, the Renishaw SP80, and Leitz LSP-X1c, -X3c, and X5 are specified to have a max 3D accelleration of 800mm/s2, which equates to 460mm/s2 for each axis (may only apply to 12.X.X and up, trying to find confirmation.) As far as I know, all your common probes (TP20, TP200, SP25) can go as fast as you can push them without false triggering. Check their spec sheets if you're unsure.

Edit: Are you running a Global Advantage, or a Classic or Performance?

how can i check what mine should be? in-case it can be sped up?

Unfortunately, I don't have specs for the Mistral. I would recommend calling applications at your local Hexagon or distributor office. Unless someone else can chime in?

So I think I have found dynamics figures for a lot of the recent machines. Unfortunately, not all the source documents can be found in one place, but luckily I have most of this data in one place gathered fron numerous quotes (with exception of Mistral and Scirocco). A few caveats, before we get to the actual numbers:

•USE AT YOUR OWN RISK!!!
•These figures may not apply to all machine sizes for a certain model.
•USE AT YOUR OWN RISK!!!
•These figures do not take into account probing systems, which may impose further limitations.
•USE AT YOUR OWN RISK!!!
•These figures may not be correct at all. All are sourced from Hexagon documents (no third parties), but whose to say if they apply only to certain years of mfg., country, etc.
•USE AT YOUR OWN RISK!!!
•Further limitations may be set in your computer or machine controller. Your mileage may vary.
•USE AT YOUR OWN RISK!!!
•Other machine parameters may have an effect on realized acceleration or traverse speeds. Your mileage may vary.
•USE AT YOUR OWN RISK!!!
•Keep in mind, the 3D speed is all three axis moving at full speed. I have calculated a single-axis speed, which is what needs to be entered in PC-DMIS.
•USE AT YOUR OWN RISK!!!

With all that said, here's what I found:

Global Classic & Performance
•Max Three-dimensional Speed: 520mm/s
•Max Three-dimensional Acceleration: 1732mm/s2
•Max Single-Axis Speed: 300mm/s
•Max Single-Axis Acceleration: 1000mm/s2
(Source: Global Product Line Datasheet, dtd 11/07)

Global Advantage 5.X.X - 15.X.X
•Max Three-dimensional Speed: 866mm/s
•Max Three-dimensional Acceleration: 4330mm/s2
•Max Single-Axis Speed: 500mm/s
•Max Single-Axis Acceleration: 2500mm/s2
(Source: Global product line datasheet dtd 11/07; multiple quotations dtd 9/10 to 2/12)

Global Advantage 12.X.X - 15.X.X
w/Renishaw SP80, or Leitz LSP-X1c, -X3c, or X5 probe
Per recent quote:
•No change to max speed
•Max Three-dimensional Acceleration: 2598mm/s2
•Max Single-Axis Acceleration: 1500mm/s2
Per analog probe parameter datasheet:
•No change to max speed
•Max Three-dimensional Acceleration: 800mm/s2
•Max Single-Axis Acceleration: 460mm/s2
(Source: Global Analog Probe Controller Constants table dtd 05/10; multiple quotations dtd 9/10 to 2/12)

Mistral
•Max Three-dimensional Speed: 433mm/s
•Max Three-dimensional Acceleration: 1000mm/s2
•Max Single-Axis Speed: 250mm/s
•Max Single-Axis Acceleration: 577mm/s2
(Not specified if speed is 3D; will assume it is to be safe)
(Source: "Turbomeca" white paper on Hexagon website accessed 9/12)

Scirocco
•Max Three-dimensional Speed: 666mm/s
•Max Three-dimensional Acceleration: 1600mm/s2
•Max Single-Axis Speed: 385mm/s
•Max Single-Axis Acceleration: 925mm/s2
(Source: "mfg." Brown & Sharpe's corporate magazine dtd winter 1997)

Xcel
•Max Three-dimensional Speed: 500mm/s
•Max Three-dimensional Acceleration: 1000mm/s2
•Max Single-Axis Speed: 290mm/s
•Max Single-Axis Acceleration: 577mm/s2
(Not specified if specs were 3D; will assume they are to be safe)
(Source: "B&R Machine and Tool Corp." white paper on Hexagon website accessed 9/12)

One
•Max Three-dimensional Speed: 520mm/s
•Max Three-dimensional Acceleration: 1732mm/s2
•Max Single-Axis Speed: 300mm/s
•Max Single-Axis Acceleration: 1000mm/s2
(Source: One product line datasheet dtd 11/07)

Reference HP 5.4.3
•Max Three-dimensional Speed: 450mm/s
•Max Three-dimensional Acceleration: 4000mm/s2
•Max Single-Axis Speed: 260mm/s
•Max Single-Axis Acceleration: 2310mm/s2
(Source: Leitz Reference product line datasheet dtd 04/10)

Reference HP/Xi/XT 10.7.6 - 45.12.9
•Max Three-dimensional Speed: 520mm/s
•Max Three-dimensional Acceleration: 4000mm/s2
•Max Single-Axis Speed: 300mm/s
•Max Single-Axis Acceleration: 2310mm/s2
(Source: Leitz Reference product line datasheet dtd 04/10)

Thanks to all of you for the input & info. I've been super busy & just now checked the thread.
It sounds like I should go with 175. It seems reasonanble & I have run it at 100 with no problems. It will definately be a big improvement over the '0' I'm finding in some of the programs. You wouldn't believe what I find in some of these programs... alignments to features that no longer exist, etc. etc.
Thanks again!

ewe 0006, great, careful and appreciable work. Thanks.

What is the max acceleration that can be used? I am at 1800 and do not see a lot of difference between that and the 600 which is the default.

MODE/DCC
CLEARP/ZPLUS,0.4,ZPLUS,0,ON
MOVESPEED/ 200
ACCELERATION/MAXACCELX=1200, MAXACCELY=1200, MAXACCELZ=1200