Stepper motors keep starting and stopping

[Davo242]

Introduction
The TB1H is a high performance microstepping driver based on the latest original TOSHIBA high-efficiency TB6600HG IC. The TB6600HG adopts PWM chopper-type single-chip bipolar sinusoidal to ensure the low vibration and high efficiency. Moreover, the brand new design with BiCD0.13 (50V) process technology on the chipset also ensures maximum 5.0A output current and 50V output withstand voltage. Consequently, as long as the current range of the stepper motor is within 0.2-5 amps, all the 2 Phase or 4 Phase of Nema17, Nema23, Nema24 and Nema34 stepper motors will work perfectly with this new-type TB6600HG Stepper Driver.
Features
High performance, cost-effective
Automatic idle-current reduction
Supply voltage up to 50V DC
Output current up to 5.0A
Suitable for 2-phase and 4-phase motors
High speed optoelectronic isolation signal input
Overload, overcurrent, overheat, overvoltage and undervoltage protection
Single-chip PWM bipolar sinusoidal chopper ensures low vibration and high efficiency
1, 2, 4 (New Mode), 8, 16 adjustable microstep control, motors run more precisely and smoothly
Equipped with the 3rd generation of breakout board, display panel and control pad to control the motor manually.
Cooling Aluminium Box Design for Cooling, and protect the driver board from being damaged by dirt, dust or other liquids.
Applications
Suitable for a wide range of stepping motors, from NEMA size 17 to 34. It can be used in various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, pick-place devices, and so on. Particularly adapt to the applications desired with low noise, low heating, and high speed performance.Both of regulated and unregulated DC power supplies can be used to supply TB1H stepper driver. However, unregulated power
supplies are preferred due to their ability to withstand current surge. If regulated power supplies (such as most off switching
supplies.) are indeed used, it is important to have large current output rating to avoid problems like current clamp, for example
using 4A supply for 3A motor-driver operation. On the other hand, if unregulated supply is used, one may use a power supply of
lower current rating than that of motor (typically 50%～70% of motor current). The reason is that the driver draws current from
the power supply capacitor of the unregulated supply only during the ON duration of the PWM cycle, but not during the OFF
duration. Therefore, the average current withdrawn from power supply is considerably less than motor current. For example, two
3A motors can be well supplied by one power supply of 4A rating. Although the unregulated power supplies are preferred,
considering the cost, the cheap and easy-to-use regulated switching supplies in the market is also a good choice for the TB1H
stepper driver and motors, as long as the total output current of the regulated switching supplies is larger than the motor’s total
rated current. Anyway, if users don’t know how to select the suitable power supplies for the TB1H stepper driver and motors,
please feel free to contact with us for assistances.
II. Selecting Supply Voltage
The TB1H stepper driver can actually operate within 12-50V(Peak Voltage) DC for different motors. Higher supply voltage can
increase motor torque at higher speeds, thus helpful for avoiding losing steps. However, higher voltage may cause more motor
vibration at lower speed, and it may also cause motor overheat and drive damage. Therefore, it is suggested to choose 12-24V DC