| Ball compatibility | Supported ball types, sizes, materials, and any stated restrictions. | Test the machine with the same ball types intended for regular use. Check feeding consistency and whether the balls move through the machine without repeated jams. | Ball types tested: __________ |
| Feed rate | Stated feeds per minute and whether the rate is adjustable. | Run a timed test at each agreed setting. Count the balls actually launched and note pauses, skipped feeds, or double feeds. | Measured rate: __________ |
| Speed and trajectory control | Available speed, elevation, and trajectory adjustments; control range and adjustment increments where specified. | Request a live demonstration at low, middle, and high settings. Record the settings and measure landing positions from a fixed, marked location. | Settings and results: __________ |
| Drill and oscillation functions | Available shot patterns, random or programmed modes, and horizontal or vertical oscillation functions. | Ask the supplier to demonstrate each listed mode. Confirm that the delivered configuration includes the functions shown in the quotation. | Functions demonstrated: __________ |
| Feeding consistency | Documented test results, test duration, ball type, machine settings, and reported feed interruptions. | Agree on a common test before comparing offers. For example, run each unit for the same number of feeds using the same balls and settings, then record misfeeds and interruptions. | Test conditions and result: __________ |
| Battery and power | Battery type, stated operating time, charging time, charger specifications, and whether the machine can operate while charging. | Request the battery and charger specifications in writing. Check operating time under a stated, repeatable setting rather than relying on an unqualified runtime claim. | Specifications confirmed: __________ |
| Construction and portability | Machine dimensions, net weight, wheel or handle details, materials, and any stated weather-use limitations. | Compare written dimensions and weight with the actual unit. Inspect moving parts, feed components, housing, wheels, and accessible fasteners during a demonstration. | Measurements and inspection: __________ |
| Controls and documentation | Control method, available instructions, setup guidance, maintenance information, and supported languages. | Request the user manual and operating instructions before purchase. Confirm that the instructions match the offered model and explain routine setup and care. | Documents received: __________ |
| Quality control | Pre-shipment inspection steps, functional-test checklist, test records, and process for reporting a defect. | Ask for the inspection checklist and a completed functional-test record for the order. Clarify how issues found before dispatch are handled. | Records and process: __________ |
| Warranty and repair support | Warranty duration, coverage, exclusions, parts availability, repair process, and response expectations. | Review the written warranty terms rather than relying on verbal assurances. Confirm who pays shipping and how replacement parts or repairs are arranged. | Terms confirmed: __________ |
| Spare parts | Availability and pricing of wear parts and other service components; ordering method and estimated dispatch time. | Request a parts list and written quotations for likely replacement items. Confirm that part descriptions correspond to the offered machine configuration. | Parts list received: __________ |
| Order and delivery terms | Quoted configuration, order quantity, production lead time, packaging details, shipping terms, and payment milestones. | Compare like-for-like written quotations. Check that model configuration, included accessories, delivery terms, and any additional charges are clearly stated. | Quotation checked: __________ |
| Supplier communication | Named service contact, technical-response process, language support, and written confirmation of commitments. | Send the same technical and service questions to each supplier. Compare the completeness and clarity of the written replies, not just response speed. | Response notes: __________ |