Instruction manual

- DA321G5321

- 13 -

NOTE

If no valid select resistor is detected upon commissioning or after a master reset and parameter 290 = 0, no

valid mode is selected.

The maximum speed is limited to 1000 RPM (for R-select 200 Ω to 200 RPM), and thread trimmers and

wipers are turned off. Only after changing the setting of the maximum speed and turning the thread trimmer

and/or wiper on will these settings be permanently in effect.

Exception: For R-select = 100 Ω, parameter 290 = 0 is a valid mode.

5.4 Transmission Ratio

NOTE

The transmission ratio must always be input, because only motors with integrated incremental transmitter will

be used. The transmission ratio should be determined and set as precisely as possible!

The transmission ratio between motor shaft and shaft of the sewing machine head must be input, so that the set

speeds of parameters 110...117 correspond to the sewing speeds.

Function with or without control panel

Parameter

Transmission ratio between motor shaft and machine shaft

(trr)

272

The transmission ratio can be selected within a range of 150...40000 using parameter 272.

Example: With a motor pulley diameter of 1.57 in and a sewing machine head pulley diameter of 3.15 in the

value 500 can be calculated using the formula below. If the value 2000 has been selected in

parameter 272, it follows that the motor pulley is double the size of the sewing machine head

pulley.

Motor pulley diameter

Value of parameter 272 =

-------------------------------------------------------------------- x 100

Machine pulley diameter

5.5 Positioning speed

Function with or without control panel

Parameter

Positioning speed

(n1)

110

The positioning speed can be set using parameter 110 on the control within a range of 70...390 RPM.

5.6 Maximum Speed Compatible with the Sewing Machine

The maximum speed of the machine is determined by the selected pulley and by the following settings:

 Set the maximum speed using parameter 111 (n2)

 The limitation of the maximum speed to the level typical for the application is set by the function "Direct

entry of maximum speed limitation" (DED) (see instruction manual for controls on the series 221/321,

general operation)