  We present the most recent technical improvements on SpIOMM, an Imaging
Fourier Transform Spectrometer (IFTS) attached to the 1.6 telescope of the Mont
M\'egantic Observatory. The recent development of SpIOMM demonstrates that the
concept of IFTS for ground telescopes is a promising astronomical 3D
spectroscopy technique for multi-object spectroscopy and multi-band imaging.
SpIOMM has been developed through a collaboration between Universit\'e Laval
and the industry (ABB Bomem). It is designed for optical observations from the
near UV (350 nm) to the near IR (850 nm) with variable spectral resolution. The
circular FOV of the instrument covers 12 arcmin in diameter. We have recently
improved the servo system algorithm which now controls the mirror displacement
and alignment at a rate of ~7000Hz. Hardware improvements to the servo and the
metrology system will be described along with their impacts on performance in
the laboratory and in observing conditions. The instrument has successfully
been operated at the 1.6 meter telescope this year using the revised control
systems and acquired several datacubes. We will discuss some issues regarding
the sensitivity to environmental conditions implied by the use of such an
instrument. An overview of the datacube reduction procedure will show some
solutions proposed for observational problems encountered that affect the
quality of the data such as sky transmission variations, wind, changing gravity
vector and temperature.
