Find your cut-off.
Choose your exact JPT M7, M8 or LP source, pulse width and frequency. See where average power levels off — and how much energy each pulse carries.
Laser settings
Average power vs. frequency
● Selected frequency ┆ Manual cut-offPulse-width reference
Select a row to use that pulse width. Frequencies are in kHz. Power estimates use your current frequency and power setting.
| Pulse width (ns) | Cut-off (kHz) | Max. (kHz) | Est. power (W) |
|---|
What does cut-off mean?
Below cut-off, the source reduces average output as frequency falls. Above cut-off, average power approximately plateaus, while energy per pulse decreases as frequency increases. Cut-off is a reference point, not a universal best setting for every material.
The maximum allowed frequency is a separate limit, determined by pulse width and source revision.
How the estimates work
For ordinary profiles, estimated average power = rated watts × power setting / 100 × min(frequency / manual cut-off, 1). Pulse energy in mJ = average watts / frequency in kHz.
This is an illustrative linear approximation, not a measurement or a calibrated source model. Actual low-power control, simmer, mode and firmware can change the result. The manual cut-off remains the full-power reference when the power slider changes. Performance mode shows table values only; output estimates are withheld.
Model revisions, source notes and supported profiles
Match the full model code and the manual revision to your laser label. M7, E-M7, E2-M7, L1, M8 and LP versions are separate profiles; data are never scaled from wattage alone.
Reviewed on 21 October 2026: ten supplied JPT manuals cover standard M7 60/80/100/120 W v1.0 and 200 W v1.1; E-M7 20/30 W v1.4, 60 W v1.0 and 80/100 W V00 2022; E2-M7 100 W Normal Mode; M8 20 W V01, 100 W V01, and 120/200/300 W S-W-V2; LP 20/30/50 W Version 02. Their complete PDF files are linked below each model table. Other retained models use their earlier, separately identified reference manuals. M8 50 W continues to use the previously uploaded V01 manual.
E-M7 20/30 W: the manual footnote caps frequency at 400 kHz for pulse widths ≥80 ns, overriding the general table maximum. Standard M7 200 W v1.1 includes a 55 ns setting at 750 kHz cut-off. Its 2/4/6 ns entries give only lower-bound output at 4000 kHz (>45/>75/>100 W), so estimated watts and pulse energy are withheld. Older E-M7 and E2-M7 200 W profiles keep their own short-pulse notes. The uploaded E-M7 80/100 W manual has no Performance-mode table, so those profiles do not offer that mode.
M8 20 W marks setting 1 as CW. The previously uploaded, machine-translated M8 50 W V01 instead lists a 1 ns pulse and setting 500 as CW; the calculator preserves those assignments. M8 50 W at 250/350 ns has an ambient-temperature condition of 10–35 °C. M8 S-W-V2 uses different preset pulse widths, and its cut-off rises again from 60 ns onwards, exactly as printed in Table 5. LP sources have fixed 200 ns pulse width, cut-off 25/37/40 kHz for 20/30/50 W respectively, and maximum 600 kHz.
Green/red indicates only whether the entered frequency lies between that manual's listed cut-off and maximum. It is not a measurement of output power or a material recommendation. CW is excluded. Power and pulse-energy values are illustrative estimates; real output control may be nonlinear and can remain nonzero at a 0% setting. This tool does not control a laser.