On-board weighing systems on forklift trucks

On-board weighing on forklift trucks and stackers

Feature	A. Hydraulic weighing system	B-1. Weighing carriage, permanent	B-2. Weighing carriage, ‘Quick-Tach’	C. Weighing forks
Measuring principle	1. static: forklift and forks must stand still 2. NEW: pressure measuring while controlled forks lowering	forks and forklift stand still	forks and forklift stand still	forks and forklift stand still
Accuracy	1: 1% 2: 0,25%	0,2%	0,2%	0,2%
Can be stamped?	no	no	yes, OIML class III (0,1%) up to FEM III - 5 tons	yes, OIML class III (0,1%) up to FEM II - 2,5 tons
Min/max weight per weighing	500 / 40.000 kg	50 / 15.000 kg	50 / 15.000 kg	50 / 3000 kg
Installation	easy on each forklift truck, on each type of lift carriage	less easy, in your workshop	easy on each forklift with standard fork carriage up to ISO/FEM IV	easy on each forklift with standard fork carriage up to ISO/FEM II and III up to 3000 kg
Front attachment	any	any except integrated side shifters	any	only with side shifters and some fork positioners
Harsh working conditions	insensitive	good	good	medium

A1. Check weighing by measuring the hydraulic pressure to the lift cylinders at a certain fork height:
Static measurement at standstill: forks are lifted to a certain height where the pressure is measured and weight displayed after about 2 seconds;
The height is detected by an inductive switch;
From 500 to 40.000 kg;
Standard accuracy : average 1% on 10 weights, 2% on an individual weight.

A-2. NEW: check weighing by measuring the hydraulic pressure to the lift cylinders during a controlled fork lowering:
A hydraulic block with a flow regulator valve and electric lowering valve in installed parallel to the pressure hose to the lift cylinders. The operator press the weighing button: the forks lower spontanuously during 5 seconds. Meanwhile the pressure is measured and converted to a weight.
Maximum error is average 0,25% of the rated capacity with a maximum of 0,5%.
Microprocessor features: tare weighing or keying in, accumulate the weights, print, weighing data transfer.
No cables over the mast.

TC2000 display TC 2000 ventielblok

B. Add a weighing carriage with 4 weigh bars between the lift carriage and the forks or front attachment:
From 100 to 10.000 kg,
Standard accuracy: 0,2%,
Can be trade approved in class OIML III with fork carriage FEM/ISO 2 and 3,
Permanent signal: weight is displayed at any fork height; forks can be (un)loaded and display shows actual weight which can be useful to mix several components,
Very strong and reliable, even in harsh conditions as foundries and wet applications.

2 ways to install:

	B-1. permanent: we drill 4 holes in your fork carriage to fix the weigh bars into. Benefit: small own thickness and weight, hence more residual lifting capacity of your forklift truck.
	B-2. ’Quick-Tach’: the 4 weigh bars are located between 2 strong carriages. The rear one is easily hung at your lift carriage or integrated sideshift, the front one takes the standard forks or any front attachment like a rotator, clamp, bucket, ... Benefit: easy installation on any standard fork carriage, also slim line carriage.

C. Weighing forks instead of standard forks Wegende vorken

Weighing forks LTF with integrated display

for reach-trucks, warehousing trucks and carefully driven counterbalanced trucks,
Digital indicator:
+ installed in the cabin, readable at any fork height,
+ integrated in the left fork with a rechargeable battery: easy installation and transfer to any other truck.
Rated capacity up to 3.000 kg,
With fork carriages FEM/ISO 2 and 3,
Fork section is only slightly wider and higher as on a standard fork,
Standard accuracy: 0,2%

Digital microprocessors with
25 mm high digits backlit,
Strong enclosures IP65,
Many models to suit your needs:
- simple indication the actual weight,
- summing up consecutive weighings,
- tare by weighing or by arrow keys or numerical keyboard,
- ad an ID number to be printed or transferred,
- alarm when a target weight is reached while filling or while emptying,
- mix several components while filling or while emptying,
- output to printer on paper coil or slips or tags,
- 2° display with small or large figures, to be read from the forks side,
- transfer weighing data to PC by contactless chip cards or handheld terminals
- Atex-protection,…

Installation.
Electrical supply to the weighing system by the forklift, straight up to 24 Volts or through a voltage converter.
Types B and C: transfer the signal between weighing carriage or forks to the microprocessor via:
- coil cable along the mast: easy installation and replacement.
- straight cable inside a rubber hose with steel wire reinforcement, parallel to the lifting chains.
- wireless radio transfer between the weighing carriage and the indicator.

Stackers:
Straddle fork stackers with standard forks can be equipped with systems A, B1, B2 and C.

Stackers with forks over the legs can be easily equipped with type A.
When a higher accuracy is requested, we can transform your fork carriage to fit weigh bars inside. Fork height is increased by 5 mm, fork width mostly by 20 mm.