Single-page tool + report flow in one URL
Tool-first screening reduces false starts
Use the checker before long vendor discussions. It forces explicit tradeoffs across step angle, torque, lead time, and documentation burden.
Hybrid Tool + Report
Use one page for both intents: run the supplier fit checker first to get an executable recommendation, then validate the decision with evidence, boundaries, risk tradeoffs, and RFQ-ready actions.
Visible boundary disclosure
This page supports supplier screening and RFQ structuring. It does not replace pilot validation, product-level qualification, or jurisdiction-specific legal review.
Source refresh timestamp
Evidence references and boundary notes (including microstep pulse budget and regional compliance boundaries) were reviewed on 2026-05-22. Time-sensitive supplier and compliance details should be rechecked before purchase order release.
Tool Layer
Start here if you need to shortlist a supplier path quickly. The tool converts your application and procurement constraints into a recommended supplier program, visible risk notes, pulse-budget pressure at your selected microstep setting, and a next-step action you can execute.
This summary block turns the checker output into procurement-ready talking points you can use in supplier meetings.
Single-page tool + report flow in one URL
Tool-first screening reduces false starts
Use the checker before long vendor discussions. It forces explicit tradeoffs across step angle, torque, lead time, and documentation burden.
Precision intent + launch reliability requirements
1 degree intent usually means tighter process expectations
In buyer practice, "1 degree" queries often carry hidden requirements: stronger traceability, stricter CTQ control, and clearer validation responsibility than generic catalog buys.
Command pulse = full-step pulse x microstep divisor
Microstep setting can dominate interface feasibility
Pulse demand scales directly with microstep ratio. A speed target that looks safe at full-step can fail at 1/128 or 1/256 unless controller timing margin is verified.
Lead-time target must cover sample + validation + documentation
Schedule and compliance risk are coupled
Compressed lead time increases failure probability when validation and document closure are not planned as explicit gates.
QMS proof + product proof + execution proof
Certification badges do not replace product evidence
Quality-system certification is useful context, but source approval still requires product-level fit, capability data, and test reproducibility under your conditions.
Pilot split + CTQ freeze + risk-retirement evidence
Boundary outcomes still give actionable next steps
If inputs are beyond screened confidence, the page returns a minimum executable path instead of a dead end.
Region-scoped dossier instead of one global checkbox
Regulatory evidence is region-specific, not interchangeable
EU RoHS/REACH and US workplace acceptance do not share the same approval logic. Treat CE, REACH, and NRTL as separate evidence tracks in RFQ planning.
| Metric | Reference Value | Why It Matters | Source |
|---|---|---|---|
| Full-step count at 1.0 deg | 360 steps/rev | Direct math conversion from mechanical step angle. | Derived from step-angle definition |
| Reference baseline at 1.8 deg | 200 steps/rev | TI lists 1.8 deg as a typical hybrid motor full-step baseline. | TI SLVAES8A (rev. Feb 2026) |
| Fine-step reference at 5-phase 0.72 deg | 500 steps/rev | Shows a different architecture path for finer native step angle. | Oriental Motor technology overview |
| DM556E input pulse limit | 200 kHz + 2.5 us min pulse width | Command-interface timing is a hard integration boundary in stack design. | Leadshine DM556E manual |
| Drive-interface variance example | 200 / 500 kHz (configurable) | Different drives can publish different command-frequency ceilings. | Leadshine EM1-870 product page |
| REACH Candidate List status | 253 entries (update: 4 Feb 2026) | SVHC list drift changes documentation and notification obligations. | ECHA Candidate List update |
| RoHS restricted substances in listed scope | 10 substances | Restricted-substance declaration should be planned in supplier dossier. | European Commission RoHS overview |
| US acceptance boundary | 39 product types under OSHA NRTL approval | CE mark alone is not accepted as a US NRTL-equivalent approval path. | OSHA NRTL FAQ |
This table converts step angle + microstep choices into command interface load. Values use a 200 kHz reference ceiling for comparison only; always verify the exact drive/controller datasheet.
| Microstep | Pulses / Rev (1.0 deg) | Max RPM @ 200 kHz (1.0 deg) | Max RPM @ 200 kHz (1.8 deg) | Decision Boundary |
|---|---|---|---|---|
| 1/8 | 2,880 | 4,167 RPM | 7,500 RPM | Lower pulse pressure, but coarser command granularity. |
| 1/16 | 5,760 | 2,083 RPM | 3,750 RPM | Common compromise zone for many open-loop systems. |
| 1/32 | 11,520 | 1,042 RPM | 1,875 RPM | Higher smoothness potential, but command-frequency margin shrinks quickly. |
| 1/64 | 23,040 | 521 RPM | 938 RPM | Speed ceiling becomes a frequent integration constraint. |
| 1/128 | 46,080 | 260 RPM | 469 RPM | Suitable only when speed demand is modest and interface is strong. |
| 1/256 | 92,160 | 130 RPM | 234 RPM | Very high command density; verify controller pulse budget and jitter tolerance. |
Use this as a quick filter before diving into full supplier comparison.
| Audience | Interpretation |
|---|---|
| Fit: OEM motion team with clear CTQ and launch timeline | Needs fast shortlist plus structured RFQ package for 1 degree-intent applications. |
| Fit: Procurement + engineering joint review programs | Requires one page that combines immediate screening and evidence-backed decision rationale. |
| Not fit: Purely price-only spot buy | If no process evidence or validation is required, this framework may feel heavier than needed. |
| Not fit: Safety-critical release without full qualification plan | Use this page as pre-screen only; complete compliance and reliability protocols are still mandatory. |
This section documents where conclusions come from and what was strengthened during the research-enhance pass.
| Audit Gap | Decision Impact | Enhancement Applied |
|---|---|---|
| Tool pulse math ignored microstep multiplier | Teams could underestimate real command-frequency demand and approve infeasible speed/microstep combinations. | Added microstep input, command pulse calculation, and pulse-headroom boundary checks against a 200 kHz reference. |
| Driver-interface assumptions were treated as single-value truth | Buyers could over-generalize one drive manual and miss that other drives publish different input-frequency ceilings. | Added 200 kHz vs 500 kHz reference comparison and explicit "verify exact drive datasheet" boundary language. |
| Regional compliance boundaries were not explicit enough | Cross-border teams could treat CE/UL/REACH obligations as interchangeable and discover blockers late in sourcing. | Added EU/US compliance checkpoint table with trigger conditions, legal references, and practical RFQ actions. |
| Public-data blind spots were implicit instead of visible | Heuristic thresholds could be misread as normative market benchmarks. | Added a dedicated "evidence still missing" table marked as "To be confirmed / no reliable public dataset". |
| Topic | Finding | Source | Checked | Link |
|---|---|---|---|---|
| Hybrid motor baseline and microstep range | TI (SLVAES8A, revised Feb 2026) describes common hybrid baseline at 1.8 deg (200 steps/rev) and microstepping up to 1/256. | TI application brief SLVAES8A | 2026-05-22 | Open source |
| Motor-level stop accuracy and finer step-angle options | Oriental Motor notes no-load stop-positioning accuracy around +/-3 arcmin (+/-0.05 deg) and shows 5-phase options such as 0.72 deg and 0.36 deg. | Oriental Motor technology overview | 2026-05-22 | Open source |
| Torque-speed pull-out boundary | Oriental Motor speed-torque guidance states that operating above the pull-out torque curve causes loss of synchronism (step-out). | Oriental Motor speed-torque curve guide | 2026-05-22 | Open source |
| Pulse interface ceiling reference (DM556E) | Leadshine DM556E manual states pulse input frequency up to 200 kHz and minimum pulse width around 2.5 us. | Leadshine DM556E user manual | 2026-05-22 | Open source |
| Drive-to-drive interface variance | Leadshine EM1-870 product page lists configurable pulse input frequencies of 200 kHz or 500 kHz, showing that interface limits vary by model. | Leadshine EM1-870 product detail | 2026-05-22 | Open source |
| RoHS restricted-substance baseline | European Commission RoHS page references Directive 2011/65/EU and Delegated Directive (EU) 2015/863, describing restriction of 10 substances across covered EEE. | European Commission RoHS directive overview | 2026-05-22 | Open source |
| REACH Candidate List update and thresholds | ECHA Candidate List update (4 Feb 2026) reports 253 entries and reiterates communication duty at 0.1% w/w plus Article 7(2) notification timing boundaries. | ECHA Candidate List update note | 2026-05-22 | Open source |
| Article 33 consumer response window | ECHA Candidate List-in-articles guidance states suppliers must reply to consumer SVHC information requests within 45 days. | ECHA Candidate List in articles guidance | 2026-05-22 | Open source |
| US NRTL boundary and CE non-equivalence | OSHA NRTL FAQ describes 39 product types under approval requirements and states CE mark is not accepted as equivalent to NRTL marks. | OSHA NRTL FAQ | 2026-05-22 | Open source |
| Quality system revision timing context | ISO 9001:2015 standard page indicates the revision project is in FDIS stage with planned publication target in September 2026. | ISO 9001 standard page | 2026-05-22 | Open source |
Use this matrix when sourcing spans EU and US programs. It helps prevent late-cycle surprises from assuming one region's evidence is automatically valid in another.
| Market Context | Rule Boundary | Trigger Condition | RFQ Action |
|---|---|---|---|
| EU - RoHS + REACH baseline | RoHS 2011/65/EU (amended by 2015/863) restricts 10 substances; REACH Candidate List updated to 253 entries on 4 Feb 2026. | If any SVHC in articles is above 0.1% w/w, Article 33 communication applies; Article 7(2) can require notification within six months of list update. | Request homogeneous-material RoHS declaration, SVHC statement, and candidate-list monitoring plan before PO release. |
| EU - Consumer disclosure boundary | ECHA Article 33 guidance states consumers can request SVHC information and suppliers should reply within 45 days. | Consumer-facing or distributor-facing programs where article disclosure requests are likely. | Predefine response owner, evidence template, and document retention scope in supplier agreement. |
| US - Workplace electrical acceptance | OSHA NRTL FAQ lists 39 product types requiring approval and explicitly notes CE mark is not accepted as equivalent to an NRTL mark. | Equipment installed in US workplace environments subject to OSHA product-approval pathways. | Confirm applicable NRTL pathway (or AHJ-equivalent acceptance route) early; do not treat CE as a direct substitute. |
| Global quality-system timing | ISO 9001:2015 page indicates the revision project is in FDIS stage with a planned publication target of September 2026. | Programs that rely on long-term supplier certification continuity across launch and ramp-up periods. | Ask suppliers for transition planning and audit timing, not just current-certificate snapshots. |
Evidence uncertainty disclosure
ECHA dynamic pages are not always machine-readable in all crawlers. Values above are linked to official pages and should be reconfirmed on the latest publication date before contract lock.
| Data Need | Status | Current Evidence Limit | Minimum Executable Path |
|---|---|---|---|
| Supplier on-time-delivery reliability by route and seasonality | To be confirmed | No reliable public dataset provides comparable OTD distributions for stepper suppliers by trade lane and demand volatility profile. | Collect supplier historical OTD evidence directly and validate with pilot and buffer-policy assumptions. |
| Application-specific Cpk benchmark for 1 degree-intent programs | No reliable public data | Public sources do not provide a universal legal or industry-wide Cpk threshold for all stepper applications and failure-cost classes. | Define Cpk targets by failure consequence, process capability study method, and containment plan in the RFQ package. |
| Comparable field-failure PPM benchmark after supplier switch | To be confirmed | Public, peer-level post-switch PPM datasets are sparse and not normalized by duty cycle, environment, or control architecture. | Run staged pilot reliability sampling with explicit acceptance criteria before full migration. |
Keep these limits visible during supplier selection meetings so the team can decide quickly when to escalate the sourcing model.
| Dimension | Recommended Zone | Caution Zone | Action |
|---|---|---|---|
| Target step angle | 0.72 to 1.0 deg when precision intent is strict | >1.2 deg while still marketed as "1 degree" intent | Clarify whether native angle or equivalent system resolution is required. |
| Process capability target | Cpk >= 1.33 for stable industrial launch | Cpk < 1.0 on high failure-cost applications | Raise control plan and incoming inspection criteria before RFQ closure. |
| Lead time vs validation | Validation window <= lead-time window | Validation window exceeds planned lead time | Split pilot and MP milestones or extend timeline before commercial lock. |
| Traceability level | Batch traceability minimum for OEM scaling | Shipment-only records under recall-sensitive programs | Define lot/serial fields and retention duration in contract appendix. |
| Sourcing model | Program matched to complexity and compliance burden | Catalog-only selection for deep-custom, short-cycle programs | Move to co-engineering path with CTQ and pilot evidence gates. |
This comparison matrix is designed for cross-functional decisions, not vendor marketing copy.
| Program Model | Best For | Strength | Tradeoff | Risk Control |
|---|---|---|---|---|
| Catalog Distributor Program | Lower volume, limited customization, moderate urgency | Fast quote turnaround, broader SKU availability | Limited control over deep process customization and capability evidence depth. | Lock exact BOM variant, substitution rules, and incoming inspection checks. |
| Application Engineering OEM Program | Mid-volume with electrical/mechanical adaptation needs | Better technical collaboration and stack-level guidance | Program success depends on communication quality and milestone discipline. | Define joint test protocol, engineering signoff points, and issue-closure SLA. |
| Certified Platform Supplier Program | Global OEM, stronger compliance and traceability burden | Structured documents, repeatable process controls, clearer audit trail | May carry higher qualification and management overhead. | Predefine document matrix, revision control, and lot-level evidence retention. |
| Co-Engineering Factory Program | Deep customization, tight schedule, higher failure-cost projects | Direct process control and faster issue iteration loop | Higher coordination load and stronger dependency on governance quality. | Freeze CTQ map, pilot gates, fallback plan, and dual-source trigger policy. |
Risks are grouped by practical trigger conditions so teams can act before failure modes appear in late launch stages.
| Risk | Trigger | Consequence | Mitigation |
|---|---|---|---|
| Spec ambiguity risk | Step-angle intent is unclear (native 1.0 deg vs equivalent system resolution). | Supplier quotes become incomparable and qualification loops extend. | Define mandatory interpretation in RFQ and bind it to measurable acceptance tests. |
| Schedule compression risk | Requested lead time does not include sample validation and document closure. | Late-stage delays, emergency shipments, and unstable launch cadence. | Split pilot/MP milestones and require explicit gate exit criteria per milestone. |
| Compliance closure risk | RoHS/REACH/marking evidence is requested late in the cycle. | Shipment hold, customs friction, or internal release rejection. | Issue document matrix at RFQ stage and verify supplier response completeness early. |
| Process capability mismatch | High failure-cost product with low capability target or weak traceability. | Field failures, higher warranty burden, and expensive containment actions. | Raise Cpk targets and lock incoming/process audit checkpoints before release. |
| Single-source concentration risk | No fallback route for critical parts or long custom qualification path. | Disruption exposure when supplier capacity or quality drifts. | Define dual-source trigger conditions and keep a pre-qualified backup plan. |
Keep uncertainty explicit. Unknown items should trigger additional evidence work, not hidden assumptions.
| Status | Detail | Decision Impact |
|---|---|---|
| Known | Step-angle-to-steps conversion and microstep-scaled pulse-frequency math are deterministic for given inputs. | Useful for immediate shortlist screening and RFQ structure definition. |
| Known | Public references provide compliance framework boundaries (RoHS/REACH obligations and US NRTL acceptance logic). | Helps define documentation scope early and reduce late-stage surprises. |
| Unknown | Supplier-specific process stability and actual launch behavior are not visible from public pages alone. | Pilot evidence and audited process data are still required before final source approval. |
| Unknown | Application-specific universal Cpk benchmark for 1 degree-intent programs. | No reliable public dataset exists; keep thresholds explicitly heuristic and tie them to failure-cost assumptions. |
| Unknown | Real lead-time reliability under your forecast volatility and engineering-change pattern. | Keep fallback schedule, escalation path, and dual-source trigger policy in the sourcing contract. |
These scenarios show how the hybrid page can move teams from screening to executable sourcing action.
| Scenario | Premise | Process | Outcome |
|---|---|---|---|
| Packaging indexing module upgrade | Need tighter angular repeatability than current 1.8 deg baseline with moderate annual volume. | Use checker to compare application OEM vs certified platform path, then require pulse/torque evidence and sample protocol. | Team selected application OEM path with explicit CTQ and reduced supplier rework cycle. |
| Medical fluid control sub-assembly | Higher failure-cost impact and stricter traceability requirement. | Set higher Cpk/traceability target and enforce compliance document matrix before commercial terms. | Program moved to certified platform supplier path with clearer audit readiness. |
| CNC retrofit with short launch window | Deep customization requested with compressed delivery target. | Boundary result triggered pilot/MP split and co-engineering factory review. | Avoided unrealistic one-shot schedule and reduced launch slippage risk. |
| Cost-sensitive regional machine line | Lower failure-cost impact and limited customization needs. | Checker recommended catalog/distributor route with strict substitution and incoming checks. | Procurement kept speed advantage while controlling fit-risk exposure. |
Questions focus on sourcing decisions and implementation risk, rather than glossary-only definitions.
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