Things You SHould Know when BUying a Used Pocket NC
A Pocket NC machine is a versatile tool for makers, engineers, and small-scale manufacturers. Buying one used can be a smart way to enter the world of 5-axis CNC machining at a lower cost. However, before making your purchase, there are a few key factors you need to consider to ensure you’re making a sound investment.
1. Inspect the Machine’s Condition
When buying any used desktop CNC machine, condition is everything. Pocket NC machines are known for their precision, but that accuracy can be compromised if critical components show signs of wear. If you are buying the machine at a distance - it could be difficult to perform an inspection. The Pocket NC V2 machine design has been relatively the same since 2017 - so there can be a wide range of wear and tear. For Pocket NC machines be sure to consider:
Stepper motors and lead screws: Pocket NC machines rely on stepper motors and lead screws for movement. Check for any signs of excessive wear or backlash in the lead screws, as this can effect the machine’s precision.
Spindle condition: A noisy or wobbly spindle could indicate wear and tear. Since the spindle is the heart of the machine, repairing or replacing it can be costly.
Overall cleanliness: A dirty machine—especially one with accumulated dust, oil, or debris in hard-to-reach places—can be a sign it wasn’t well maintained. Poor upkeep can lead to excess wear on critical components and future repair costs.
Overall wear and tear: Take note of how well the machine has been maintained. Gouges in the table or dents on the corner of the machine may indicate the machine was crashed or dropped.
2. Consider the Kinetic Control Update
One important update to look out for is the Kinetic Control Update. This upgrade can improve machine performance, giving you more control over your cuts. If the used Pocket NC you’re considering was manufactured before November of 2021 and has not yet been updated, factor in the cost of this update if you plan to improve the machine's capabilities. More information about the Kinetic Control update is available here.
3. Remote Service Options
When buying used, a common concern is the availability of maintenance and support. The Pocket NC Remote Service Subscription can help you keep a used machine in peak condition by offering virtual assistance, troubleshooting, and support for ongoing maintenance. This subscription is a great option if you’re concerned about servicing needs over time although you will want to take the cost of it into consideration. New Pocket NC V2-10s and V2-50s come with a 2 year remote service subscription while the Pocket NC V2-8Lite comes with a 1 year subscription.
4. Availability of Support and Parts
Another factor to consider is the availability of support for the model your purchasing. If you’re looking at an older V1 Pocket NC machine(these machines are green or silver), note that Penta Machine Co. no longer carries replacement parts for V1 machines and offers minimal suuport. However, there are still valuable resources available for V1 users, which can be accessed online here.
5. Total Cost of Ownership
While the initial price of a used Pocket NC might seem like a bargain, make sure to account for the total cost of ownership:
Service and maintenance: Used machines may require more frequent service, especially if they haven’t been well-maintained.
Repairs if you receive the machine and find out that it was damaged, you may choose to send it to Penta Machine Company for repair.
Accessories: Depending on the condition and inclusions, you may need to purchase additional tools, workholding accessories, or fixtures.
CAM Software: Whether you’re buying new or used - it’s important to consider the cost of 5-axis CAM software in your purchasing decision.
6. Seller Reputation
When buying used, it’s essential to trust the seller. Ask the seller about the machine’s history, including how often it was used, what kinds of materials were machined, and whether it has undergone any significant repairs. Buying from a reputable source can reduce the risk of purchasing a machine that needs costly repairs.
7. Test the Machine, If Possible
Before finalizing your purchase, try to see the machine in action. If possible, request a demonstration to ensure everything is running smoothly. Pay attention to the quality of movement in the axes, the sound of the spindle, and whether the control software is functioning without issues.
8. Export Considerations
Due to the export-controlled nature of 5-axis CNC milling machines - it is against the law to ship the machine out of the country it was delivered to without approval from the U.S. government.
Conclusion
Buying a used Pocket NC can be a smart investment, but it’s important to do your homework before committing. By thoroughly inspecting the machine, verifying software updates, and considering support options like the Kinetic Control update, you can ensure you’re getting a machine that will serve you well. Remember, Penta Machine Co. offers service subscriptions to help keep your machine in top condition, and user resources for older V1 models are still available online.
If the used Pocket NC shows too many signs of wear, you might want to consider purchasing a new Pocket NC. The Pocket NC V2-8Lite was recently released to offer a lower cost option while still maintaining the excellent service and quality our customers expect. A new machine ensures top performance right out of the box, complete with the latest updates, remote support and a full warranty. If you've already purchased a used Pocket NC and need support, or if you find yourself interested in exploring the option of a new machine, feel free to contact Penta Machine Co. for assistance.