What size linear scales for Seig SX3L

This topic has 8 replies, 7 voices, and was last updated 14 June 2016 at 17:21 by Clive Hartland.

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14 June 2016 at 01:02 #242718
Mark Eisen
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@markeisen61287
What size linear glass scales would I need to fit a Seig SX3L mill.

The table size is 700 mmX 160 mm , spindle to table is 380 mm.
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14 June 2016 at 01:02 #18124
Mark Eisen
Participant
@markeisen61287
14 June 2016 at 01:21 #242719
not done it yet
Participant
@notdoneityet
It is not table size that matters; it is table travel. Scales must be sufficientlly long so that the readers do not foul at the extremities of travel.
14 June 2016 at 07:17 #242731
John Hinkley
Participant
@johnhinkley26699
Rather than post a long-winded explanation, go to http://www.dropros.com and follow the links to videos. There you will find a long-winded video on how to size your mill for scales. There is other useful info there, too. Also available on youtube, just put the relevant keywords into a search.

John
14 June 2016 at 08:13 #242737
JasonB
Moderator
@jasonb
I have a standard length table and use :

X – 370mm

Y – 170mm

Z – 570mm ( makes fitting easy if its a long one)

So as the table is 150mm longer you will need a 520mm (370 + 150)

This is based on teh GS 500 scales from Allendale, other sizes may be different as will magnetic scales.

Edited By JasonB on 14/06/2016 10:54:11
14 June 2016 at 08:56 #242742
Paul Lousick
Participant
@paullousick59116
The travel of the scales should be slightly longer than the maximum travel of the mill. The scales could be damaged if they bottom out at the ends.

I have an Easson ES-14 readout on my SX3 mill with a 600mm glass scale for the X-axis (this is longer than I need but was on special and they had it in stock), 250mm for Y-axis and 400mm for the Z-axis.

Paul.
14 June 2016 at 12:26 #242774
Neil Wyatt
Moderator
@neilwyatt
You need travel + reading head size + length taken up by two mounting points + an allowance for a gap between the read head and the mounts at each and of travel.

With capacitative scales the extra required can be 3-4".

Neil
14 June 2016 at 14:45 #242789
Clive Hartland
Participant
@clivehartland94829
When I did my conversion I also made table stops to fit in the slot on the side of the table so that any inadvertent over run could not happen. So far I have not had a job that was any where near that long.

Also when drilling fixing holes ensure that the location is square/parallel to the table. The 'Z' slide fixing meant I had to drill a fixing from above and had very little headroom. You may find that you will need to remove the table off the machine as well. Or, remove the spindle so you can push it to left as far as you can.

Clive
14 June 2016 at 17:21 #242812
Clive Hartland
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@clivehartland94829
A correction there, for left read 'Right'.

Clive
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