14 HD65 & HD130 Stepper Drives User Guide

14 HD65 & HD130 STEPPER DRIVES USER GUIDE

Step Pulses

Phase 1

Phase 2

Figure 5. Current Profile with Square-off

Fuses	The main fuses are fitted on the inside of the motherboard and are
	accessible by removing the drive. Ensure that the power has been
	turned off before any fuses are inspected. Fuse ratings are as
	follows:
	FS1	- Fan fuse, 500mA quick acting.
	FS2	- Power dump fuse, 2 amp time-delay.
	FS3, FS4, FS5	- 172v AC input fuses;

12.5amp time-delay for HD65, 25 amp time-delay for HD130.

FS6, FS7	-	18v	AC input fuses, 1 amp time-delay.
FS8	-	24v	DC auxiliary output fuse, 500mA quick acting.

In addition there is an internal fuse within the drive module itself, in the 240v DC supply between the main capacitor and the switch set. This is a quick-acting type rated at 10A (HD65), 20A (HD130).

All fuses are 1-1/4 inch type. HBC (high breaking capacity) fuses are recommended for fuses FS3, FS4, FS5 and the internal drive fuse.

Test Points

At the base of the motherboard are test points which may be used to monitor motor current using an oscilloscope. The sensitivity is 10.8 amps/volt for the HD65 and 21.5 amps/volt for the HD130.

TP1 - phase 1 current monitor

TP2 - phase 2 current monitor

TP3 - reference voltage (factory use only)

TP4 - 0v (use for scope probe earth lead)