The Finger Joint Capacity Calculator estimates the production capacity of a lumber finger jointing line. It combines operating schedules, production losses, feed speed and block dimensions to calculate annual output, hourly production, fibre loss and required RF tunnel length. Results are available in Metric or Imperial units.

Operating schedule and production time:

• Enter operating weeks, statutory holidays, shifts per day, shift hours and scheduled breaks. Adjust order-file availability, operational downtime, time waiting on other equipment, and the frequency and duration of dimension changes.
• The calculator reports available hours and net production hours per year. Operational readiness expresses production hours as a percentage of available hours.

Finger jointing throughput:

• Enter average block length, lineal feed speed and the maximum number of blocks the infeed system can process per minute. For equipment that stops during jointing, enter the jointing stop time and deceleration/acceleration distance. Set stop time to zero for continuous-feed operation.
• The calculator estimates blocks processed per producing minute, limited by the entered maximum infeed rate. It also reports blocks per available minute after accounting for the operating schedule and production losses.

Finished dimensions and production volume:

• Enter block thickness and width, end-trim allowance, finger joint length, eased-edge radius, minimum planer allowance and finished lamella thickness.
• The calculator determines lamella width and estimates net production volume after trimming, finger jointing and planing allowances. Results include annual volume, volume per available hour and volume per production hour. Fibre loss is reported as a volume and as a percentage of net finished volume. Flying cut-off saw losses are excluded.

RF tunnel length:

• Enter the RF tunnel glue cure time. The calculator multiplies lineal feed speed by cure time to estimate the minimum tunnel length, rounded up to the next whole metre or foot.

Using the results:

• Change an input, then press Enter or leave the field to update the results. Switch between Metric and Imperial units to view equivalent measurements. Reset restores the supplied defaults, and Print produces a summary of the inputs and calculated results.
• Use the calculator to compare operating scenarios, identify throughput constraints and assess how scheduling, downtime, block dimensions and feed speed affect estimated production capacity.