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<HTML>
<HEAD>
<TITLE>POLDI motors</TITLE>
</HEAD>
<BODY>
<H1>POLDI motors</H1>
<P>
<h2>Physical Motors</h2>
<DL>
<DT>D1HL
<DD>2-axis diaphragm - horizontal translation (left)
<DT>D1HR
<DD>2-axis diaphragm - horizontal translation (right)
<DT>D2HL
<DD>4-axis diaphragma - horizontal translation (left)
<DT>D2HR
<DD>4-axis diaphragma - horizontal translation (right)
<DT>D2VU
<DD>4-axis diaphragma - vertical translation (upper side)
<DT>D2VL
<DD>4-axis diaphragma - vertical translation (lower side)
<DT>SHU
<DD>sample table x-translation
<DT>SHL
<DD>sample table y-translation
<DT>SV
<DD>sample table z-translation
<DT>SA
<DD>sample table rotation
<DT>SGU
<DD>sample goniometer rotation (alpha)
<DT>SGL
<DD>sample goniometer rotation (beta)
<DT>RSU
<DD>sample table overlay for radioactive samples (x-translation)
<DT>RSL
<DD>sample table overlay for radioactive samples (y-translation)
<DT>RSA
<DD>sample table overlay for radioactive samples (rotation)
</DL>
</P>
<h2>Virtual motors</h2>
<p>
Virtual motors are instrument parameters which can be driven with the
drive and run commands, though they are not physical motors. Mostly
this encompasses coordinated movements of motors around several axis
or other lengthy and error prone hardware operations.
<dl>
<DT>flightpathlength
<DD>distance between chopper and detector [in mm]
<DT>chopper_sample
<DD>distance between chopper and sample [in mm]
<DT>chopper_dia
<DD>distance between chopper and 2-axis diaphragma [in mm]
<DT>dia1_dia2
<DD>distance between 2-axis diaphragma and 4-axis diaphragma [in mm]
<DT>dia2_sample
<DD>distance between 4-axis diaphragma and sample position [in mm]
<DT>detectordist
<DD>distance between sample position and detector [in mm]
<DT>chopperspeed
<DD>disk chopper speed
<DT>twotheta
<DD>scattering angle to the middle of the detector
<DT>x0_det
<DD>centre of the detector circle (x-coordinate)
<DT>y0_det
<DD>centre of the detector circle (y-coordinate)
<DT>nodet
<DD>number of detector cells (400 really cells exist)
<DT>det_size
<DD>size of a single detector cell [in mm]
<DT>det400
<DD>automatic configuration of the histogram memory to 400 detectors with
a cell size of 2.5 mm
<DT>det800
<DD>automatic configuration of the histogram memory to 800 detectors
(including 400 virtual detectors) with a cell size of 1.25 mm
</dl>
Note: The adjustments of det400 and det800 will be activated after giving a
HM init command!
</p>
</BODY>
</HTML>