Option MOTF > Hardware setup > Card Specific: USC-1

For the USC-1 card, there is one channel available: the single ended MOTF_CH_0 channel of the 37 pin connector:

USC-1
single ended tracks: Channel 0
37-pin connector: MOTF_CH_0_A
37-pin connector: MOTF_CH_0_B

Table 54: Required MOTF connection for USC-1

Here, the individual options for a USC-1 card are described. To get to the dialog window below (figure 352), select Menu bar → Settings → System → Optic → Advanced.

MOTF_Setup_USC-1

Figure 352: MOTF Settings for USC-1 Cards

Marking On The Fly:

Enable: Activate this checkbox to enable Marking On The Fly.

Simulation: Activate this checkbox to enable Simulation Mode.

Multiplier [µm/count]: Enter the value of the multiplier here in µm/count. If you enter a negative value, the MOTF compensation is switching the direction.
Example of a USC-1 MOTF-Multiplier calculation. In this calculation the radius of the encoder wheel is 50 mm and the encoder is generating 2000 pulses per track (A and B) and full rotation:

MOTF-Multiplier_Calculation_USC-1

X/Y: Choose the direction in which the target is moving during Marking On The Fly (for neutral optic settings).

inv. Offset: ScMotfOffset control objects can only be positive. It is possible that the MOTF compensation is set up correctly but the MOTF counter value is decreasing (counting negative). In this case, you have to enable this checkbox to be able to use ScMotfOffset control objects.

Only the following configurations allow correct compensation and advanced MOTF features (like ScMotfOffset):

Setup			USC-1 MOTF settings
MOTF direction	Phase shift track A - B	Orientation of MOTF coordinate	Sign of MOTF multiplier	Inv. Offset checkbox
→ or ↑	B after A	normal	positive	unchecked
→ or ↑	B after A	inverted	negative	checked
→ or ↑	B before A	normal	negative	unchecked
→ or ↑	B before A	inverted	positive	checked
← or ↓	B after A	normal	negative	checked
← or ↓	B after A	inverted	positive	unchecked
← or ↓	B before A	normal	positive	checked
← or ↓	B before A	inverted	negative	unchecked

Table 55: USC-1 MOTF settings for different setups

Phase shift track A - B (refer to chapter Encoder Signals):

•B after A: track B is 90° (pi/2) phase-shifted to track A.

•B before A: track B is -90° (-pi/2) phase-shifted to track A.

Orientation of MOTF coordinate:

•normal: the MOTF axis is not inverted in SAMLight → Settings → System → Optic

•inverted: the MOTF axis is inverted in SAMLight → Settings → System → Optic

The orientation of the coordinate system of the UCF correction file has no influence on the MOTF settings.

It is highly recommended to set 'Settings → System → Optic → Rotation' to '0':

•The rotation rotates the entity, but not the MOTF direction.

If a rotation is required, implement the rotation directly in the UCF correction file.

note

•If the marking is started with an external trigger (sensor), it is recommended to start the marking in trigger mode (Mark →Trigger) to avoid jitter of the position.

•ScMotfOffset control objects do not work in MOTF simulation mode for USC-1 cards.