Micro-step A4988 Stepper Motor Driver Module+Heat Sink for 3D Printer Reprap, US $6.75 – Picture 0

Micro-step A4988 Stepper Motor Driver Module+Heat Sink for 3D Printer Reprap, US $6.75 – Picture 1

Micro-step A4988 Stepper Motor Driver Module+Heat Sink for 3D Printer Reprap, US $6.75 – Picture 2

Micro-step A4988 Stepper Motor Driver Module+Heat Sink for 3D Printer Reprap, US $6.75 – Picture 3

Micro-step A4988 Stepper Motor Driver Module+heat Sink For 3d Printer Reprap

US $6.75

Hong Kong, Hong Kong
Jun 9th

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Micro-step A4988 Stepper Motor Driver Module+Heat Sink for 3D Printer Reprap Description: • A4988 surface mount QFN package (ES), the size of 5 mm *5 mm nominal overall package height of 0.90 mm??, and with exposed pad for enhanced thermal dissipation. The package is Pb (suffixes-T), with 100% matte tin leadframe plating. • A4988 is a complete microstepping motor driver with built-in translator for easy operation. The product can be full, half, 1/4, 1/8 and 1/16 step mode to operate bipolar stepper motor output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator can slow or mixed decay mode. The converter is the key to the easy implementation of the A4988. In inputting one pulse on the STEP input drives the motor one microstep. No phase sequence tables, high frequency control lines, or complex interfaces to programming. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened. • Micro-step operation, the chopping control in the A4988 automatically selects the current decay mode (Slow or Mixed). In the mixed decay mode, the device is initially set to fast decay in the part of the fixed off-time, then a slow decay in the rest of the downtime. Mixed-decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry to improve the pulse-width modulation (PWM) power consumption when operating. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover current protection. Special power-Sort. Feature: Micro-step operation, the chopping control in the A4988 automatically selects the current decay mode (Slow or Mixed). In the mixed decay mode, the device is initially set to fast decay in the part of the fixed off-time, then a slow decay in the rest of the downtime. Mixed-decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry to improve the pulse-width modulation (PWM) power consumption when operating. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover current protection. Special power-Sort. Package Included: 5 x StepStick Stepper motor driver module 5 x Mini Heat Sink 1. We Do Accept Paypal only. 2. eCheque will be held until cleared. 3. Great appreciate for prompt payment. Unpaid order will be opened an unpaid case by ebay after 14 days without receiving payment. 1.Orders will be processed and dispatched within 24-48 hours after payment is clear. 2.We only ship to confirmed eBay addresses. Your eBay address MUST MATCH your Shipping address. 3.If you have not received your shipment within 35 business days from payment, please contact us. We will track the shipment and get back to you as soon as possible. Our goal is customer satisfaction! 4.Please note that estimated delivery time is depended on destination countries, and may subject to customs clearance process, and weather condition in your area. 1.Return is accepted within 30 days after the buyer's receiving the item. 2.If you are not completely satisfied with your purchase, you may return it to us for a prompt exchange or we will refund your payment. 3.Delivery fees will not be refunded.Please understand that shipping and handling fee is not refundable. Buyer is responsible for shipping costs incurred shipping products back.(Include your name, address, item, daytime telephone, how you paid, and if you are requesting a refund or exchange.) 4.After getting the returned item, we will refund the customer at the item's price ( excluding the shipping costs to and fro ). 1.We are always striving to offer our customers high product quality, reasonable prices, excellent customer service and a reliable credit standing. If you like our products, please add my eBay shop to your "My Favorites" list. 2.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us or feedback, so that we can satisfactorily address your concerns. 1.If you have any question, Please contact us by ebay message(not e-mail). we will reply to you within 24 hours. 2.We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please allow 24 business hours for us to response. On Sep-04-15 at 02:55:48 PDT, seller added the following information: inkFrog Analytics

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	MPN	Does Not Apply
Brand	Sanzo
Country/Region of Manufacture	China
Model	SZ1123
UPC	Does not apply
ISBN	Does not apply
EAN	Does not apply